Bolthole Index

Jefferson County, Oregon

Building permits, zoning and land rules in Jefferson County, Oregon

65Index Score / 100
#3 of 36 in Oregon

Unincorporated Jefferson County, Oregon requires residential building permits under Oregon's statewide building-code system12. County zoning governs unincorporated land; incorporated cities may have separate development codes34. Jefferson County Community Development handles land-use review and most residential septic approvals before building-plan review56. County RV rules prohibit permanent habitation but allow temporary occupancy under specified conditions7.

At a glance

Building permit
Required for a new home and specified residential alterations18
Zoning
Yes; county zoning regulates development in unincorporated Jefferson County910
Septic permits
Jefferson County Community Development administers the On-Site Septic Program116
RV living
No permanent habitation; temporary visitor stays and occupancy during permitted home construction have conditions7
Tiny home
County occupancy and siting rules remain unconfirmed; zoning and building review come first91
Owner-builder
A limited Oregon exemption is available, but a building permit is still required12
Driveway access
A county-road driveway connection requires a permit; state-highway access needs ODOT approval13
Septic soils
Only 3.3% of county soils are rated “not limited” for a conventional drain field14

Who to call

Building permits

Jefferson County Community Development

Land-use review, building-plan review, building permits and inspections for Jefferson County

(541) 475-4462

85 SE D Street, Madras, OR 97741

Online permits →

Codes & inspections

Jefferson County Community Development — Building Codes and Permits

Online applications and permit searches through Oregon ePermitting

(541) 475-4462

85 SE D Street, Madras, OR 97741

Online permits →

Planning & zoning

Jefferson County Community Development — Planning

Parcel zoning, permitted uses, development standards and land-use review

(541) 475-4462

85 SE D Street, Madras, OR 97741

Septic permits

Jefferson County Community Development — On-Site Septic Program

Rural septic site evaluations, construction applications and installation inspections under delegated Oregon DEQ authority

(541) 475-4462

85 SE D Street, Madras, OR 97741

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in Jefferson County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Jefferson County, Oregon?

Yes. Jefferson County, Oregon requires a building permit to construct, enlarge, alter, repair or move a residential building or structure, subject to the listed exemptions and conditions8. Jefferson County Community Development says no construction is allowed without a permit5. Oregon cities and counties administer a single statewide building-code system; residential construction in Jefferson County falls under the Oregon Residential Specialty Code2.

Permitted work is inspected, must remain accessible until approval, and cannot proceed beyond an inspection point without the building official's approval15. A new dwelling cannot be occupied until the building official issues a certificate of occupancy or a temporary certificate16.

Oregon's owner-builder provision is narrow: qualifying owners who intend to occupy the home and perform the structural work themselves or with unpaid help receive limited relief from certain standards but still need a building permit12. A qualifying agricultural building on designated farm or forest-use land may be exempt only from the structural code; the exemption does not cover a dwelling, replace zoning review or eliminate electrical, plumbing or mechanical permits1718.

Who is the Jefferson County building department, and how do you reach it?

Jefferson County Community Development is the county building and planning office at 85 SE D Street, Madras, OR 97741, phone (541) 475-44625. The office reviews land use, septic approval, site plans and building plans before issuing a construction permit5.

Applicants can apply and search for Jefferson County permits through Oregon ePermitting; county permit records begin with 45119. Online availability depends on what the participating local jurisdiction offers, and applicants can use the state system to track status, pay fees, upload documents, schedule inspections and review results20.

Permit costs vary by the work: Oregon's methods use valuation for structural work, fixtures or rooms for plumbing, equipment for mechanical work and square footage or circuits for residential electrical work21. Jefferson County also assesses development-type-based system development charges for qualifying new development and redevelopment22. Ask Community Development for a current parcel-specific estimate before setting the construction budget5.

Does Jefferson County, Oregon have zoning?

Yes. The Jefferson County Zoning Ordinance regulates development in unincorporated Jefferson County; incorporated cities may have separate development codes234. Community Development can identify a parcel's zone, allowed uses and required land-use review24.

Setbacks depend on the district: Forest Management requires at least 40 feet from every property line, with larger setbacks possible for siting, fire safety and waterways25. Three Rivers Recreation Area requires 30 feet front and 15 feet side and rear, plus applicable rim, riparian and fire-safety standards26. Camp Sherman Rural Residential requires 30 feet front and 15 feet side and rear; its riparian setback is generally 100 feet from the top of bank, subject to specified exceptions27.

Oregon's resource-land minimums generally require 80 acres for non-rangeland exclusive farm use and forestland, and 160 acres for designated rangeland, with statutory exceptions for lower county minimums28. Camp Sherman Vacation Rental zoning does not authorize ordinary principal residences in vacation units, except management and employee housing; owner stays are limited to 30 days per calendar quarter with required breaks29.

How do septic permits work in Jefferson County?

Jefferson County Community Development administers Oregon DEQ rules for most residential and small-business onsite systems, while DEQ retains systems requiring a Water Pollution Control Facilities permit630. Septic permits are required for new systems, alterations and repairs; a site evaluation generally comes first, and an installation permit is valid for one year31. The county's development sequence puts land-use approval before septic evaluation and septic approval before building-plan review5.

Only 3.3% of Jefferson County soils are rated “not limited” for a conventional septic drain field; septic feasibility and system type require a site evaluation1430. Pressure-distribution, sand-filter and alternative-treatment systems have required inspection lists, although the onsite agent may waive some inspections32. Off-grid wastewater disposal is possible only where sewer is not legally and physically available and the site meets soil, groundwater, setback and sewage-flow rules33. For property within a city limit, urban growth boundary or sanitary district, the sewer authority must determine whether sewer connection is practical, legally available and supported by capacity34.

Can you live in an RV or tiny home on land in Jefferson County?

The general RV rule for unincorporated Jefferson County prohibits permanent habitation and limits temporary visitor housing to 60 days in any 12-month period7. An owner may occupy an RV during home construction after a building permit is issued, with necessary plumbing permits and inspections; the RV must be removed if the building permit expires7. Permanent utility connections and subsurface septic connections are generally prohibited, with exceptions for Three Rivers Recreation Area, specified Crooked River Ranch Residential provisions and permitted home construction7.

Three Rivers Recreation Area allows seasonal RV or tent camping with a DEQ-standard septic system or vault toilet and gray-water sump35. One month after a permanent home's certificate of occupancy, the owner must decommission the RV septic connection and remove permanent electrical and other utility hookups35. Ask Community Development which district and exception apply to an unincorporated parcel24.

We could not confirm Jefferson County's tiny-home or tiny-home-on-wheels occupancy rules; ask Community Development about classification and siting before purchase24. Oregon's residential code includes specialized small-home provisions, but building-code coverage does not establish county zoning permission363.

Building a home in Jefferson County: what are the steps?

Jefferson County's own development sequence makes the order clear5.

  1. Ask Community Development to identify the parcel's zone, allowed residential use and required land-use approval24.
  2. Establish legal physical access before building or septic permits are issued; new county-road or local-access-road driveways need a driveway connection permit, and state-highway access needs ODOT approval before the building permit13.
  3. Secure land-use approval, then apply for the county's on-site septic site evaluation530.
  4. Submit the site plan and building plans after land-use and septic approvals5.
  5. Apply through Oregon ePermitting where the county offers the permit online, then pay the assessed fees when requested1920.
  6. Keep work open for required inspections and do not advance past an inspection point until it is approved15.
  7. Obtain the certificate of occupancy or temporary certificate before occupying the new dwelling16.

What should you check before buying land in Jefferson County?

Start with zoning, lawful access, wastewater feasibility and flood status before treating an unincorporated Jefferson County parcel as buildable9133738. Development in a mapped special flood hazard area needs a floodplain development permit before work begins, including structures, manufactured dwellings and fill38.

Groundwater use generally needs a water-use permit, but Oregon exempts specified uses, including domestic use up to 15,000 gallons per day and lawn or garden irrigation of no more than 0.5 acre39. A water-use exemption does not waive Oregon's well-construction standards39. A landowner constructing, altering, converting or abandoning a water-supply well needs an Oregon Water Resources Department landowner permit before work unless licensed and bonded as a well constructor; the fee is $550 with a $10,000 bond or irrevocable letter of credit40. Only the owner of record, an immediate family member or a full-time employee whose main duties are not well construction may operate the drilling machine under that permit40.

Jefferson County's effective property-tax rate is about 0.7%, the median annual bill is $2,506, and building permit fees and system development charges vary by project41422122.

Watch-outs

  • Do not assume a seller's description of a parcel as buildable answers the zoning question; Jefferson County Planning identifies allowed and prohibited uses through the zoning ordinance24.
  • Only 3.3% of Jefferson County soils are rated “not limited” for a conventional septic drain field; a low rating does not make septic impossible, but makes the site evaluation essential1430.
  • A county-road driveway connection needs a permit, and state-highway access needs ODOT approval before the building permit13.
  • Jefferson County prohibits permanent RV habitation; do not treat seasonal camping or an RV construction exception as permission for a permanent residence735.

Sources

  1. Jefferson County Community Development - Building Codes and Permits (2026 county census)
  2. Building Codes Division, quoted and re-checked
  3. South Madras Concept Area Refinement Plan — Technical Memo 2: Policy Review, quoted and re-checked
  4. South Madras Concept Area Refinement Plan — Technical Memo 2: Policy Review, quoted and re-checked
  5. Jefferson County Community Development (jeffersoncountyor.gov)
  6. Residential Septic Permitting, quoted and re-checked
  7. ecode360.com, quoted and re-checked
  8. About Oregon residential building permits, quoted and re-checked
  9. South Madras Concept Area Refinement Plan: Technical Memorandum #3.2 – Policy Review, quoted and re-checked
  10. South Madras Concept Area Refinement Plan: Technical Memorandum #3.2 – Policy Review, quoted and re-checked
  11. Residential Septic Permitting, quoted and re-checked
  12. Oregon Revised Statutes, ORS 455.320, quoted and re-checked
  13. Chapter 17.4: Supplementary Provisions - Jefferson County, OR, quoted and re-checked
  14. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  15. 2023 Oregon Residential Specialty Code - Chapter 1, quoted and re-checked
  16. 2023 Oregon Residential Specialty Code - Chapter 1, quoted and re-checked
  17. Oregon Revised Statutes, ORS 455.315, quoted and re-checked
  18. Statewide Statutory Interpretation 13-03: Agricultural Building Exemption, quoted and re-checked
  19. Jefferson County Community Development — Building Codes and Permits (jeffersoncountyor.gov)
  20. Online building permit application process for homeowners (Oregon statewide rule), quoted and re-checked
  21. Valuation and fee requirements by work/record type (Oregon statewide rule), quoted and re-checked
  22. Jefferson County, Oregon - System Development Charges (SDCs), quoted and re-checked
  23. South Madras Concept Area Refinement Plan — Technical Memo 2: Policy Review, quoted and re-checked
  24. Jefferson County Community Development — Planning (jeffersoncountyor.gov)
  25. Chapter 17.3: Land Use Zones, quoted and re-checked
  26. Chapter 17.3: Land Use Zones, quoted and re-checked
  27. Chapter 17.3: Land Use Zones, quoted and re-checked
  28. Oregon Revised Statutes, Chapter 215 — County Planning; Zoning; Land Development, quoted and re-checked
  29. Chapter 17.3: Land Use Zones - Jefferson County, OR, quoted and re-checked
  30. Jefferson County Community Development — On-Site Septic Program (jeffersoncountyor.gov)
  31. Residential Septic Permitting, quoted and re-checked
  32. Onsite Wastewater (Septic) Rules Update, quoted and re-checked
  33. Housing and Onsite Wastewater Management, quoted and re-checked
  34. Onsite Wastewater (Septic) Rules Update, quoted and re-checked
  35. Chapter 17.3: Land Use Zones, quoted and re-checked
  36. Residential Structures Code Program, quoted and re-checked
  37. Housing and Onsite Wastewater Management, quoted and re-checked
  38. Chapter 17.3: Land Use Zones - Jefferson County, OR, quoted and re-checked
  39. Oregon Water Resources Department: Permits, quoted and re-checked
  40. Landowner Constructed Wells, quoted and re-checked
  41. Effective property tax rate: Bolthole Index county data
  42. Median property tax bill: Bolthole Index county data

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 6 of its neighbors, Jefferson County requires a building permit for a home.

RuleJefferson CountyDeschutes CountyWasco CountyWheeler CountyCrook CountySherman CountyHood River County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Community DevelopmentCounty Community DevelopmentNorth Central Public Health DistrictOR DEQ Onsite Wastewater ProgramCounty Community Development On-Site Septic ProgramNorth Central Public Health DistrictCounty Env. Health

County locator

Jefferson County in Oregon

65
County map
Jefferson County highlighted among the Oregon counties · colored by Index score

How Jefferson County scores

Seclusion74100% ev.
Self-Sufficiency45100% ev.
Admin Boringness42100% ev.
Durability53100% ev.
Property Autonomy72100% ev.
Carry Cost71100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$433kTypical home
0.7%Property tax
$1,816Land / acre
18.4"Annual rain
28.5% of yrsSevere drought
5.7 / yr (+4.5)Mid-century 100°F days
33.2 daysMid-century dry spell
1.06" (+6.4%)Mid-century 1-day rain
1.21×Wildfire change factor
100%Forward climate coverage
$1,183Home insurance / yr
3.3% / yrInsurance growth
0.94%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
4,443Radius comparison (15 mi)
14.3People / sq mi
28.2%Federal land
58.4%Land at 15% slope or less
3.3%Soils rated "not limited" for septic (strict USDA rating)
31,189 acWorkable land screen
35.7%Wooded land
22 tonsBiomass / forest ac
47.6°FAvg temp

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Cities and towns in Jefferson County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Madras

Answers from the rulebook for Jefferson County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Jefferson County rules

  • County-wide zoningPresent (with conditions)

    Development in unincorporated Jefferson County, Oregon.

    • The county zoning ordinance applies to unincorporated Jefferson County.
    • The ordinance addresses access, transportation improvements, clear-vision areas, traffic impact analysis, and parking.
    • Road design standards, including minimum rights-of-way, are addressed in Chapter 12.18 of the County Code rather than the zoning ordinance.
    • A traffic impact study may be required as part of an application for Site Plan Review, a conditional use permit, a land division, or a zoning map amendment.
    “The Jefferson County Zoning Ordinance regulates development within unincorporated Jefferson County and implements the long-range land use vision embodied in the Comprehensive Plan and TSP.”
    2 more reviewed findings on this topic
  • Local zoningVaries (with conditions)

    Aggregate local zoning across Jefferson County, including the county’s unincorporated jurisdiction and incorporated municipal areas.

    • Jefferson County zoning regulates development within unincorporated Jefferson County.
    • The City of Madras has a separate City of Madras Development Code, identified as Title 18 of the City of Madras Municipal Code, governing land-use development potential and requirements within the city context.
    • This claim aggregates local zoning and does not treat the county as the administrator of municipal ordinances.
    • The cited source does not resolve the zoning authorities and current zoning sources for every incorporated municipality in Jefferson County.
    “The Development Code is located within Title 18 of the Madras Municipal Code. It establishes the zoning standards and land use procedures for the City.”
    One more reviewed finding on this topic
    • Varies (with conditions) — Local zoning across Jefferson County, aggregating county zoning for unincorporated areas and separate municipal development-code regulation within incorporated jurisdictions.
      “The Jefferson County Zoning Ordinance regulates development within unincorporated Jefferson County [...] City of Madras Development Code (Title 18 of the City of Madras Municipal Code)”
  • SetbacksSpecified

    Buildings in the Camp Sherman Rural Residential CSRR-3 and CSRR-5 Zones.

    • New development and structures must comply with applicable riparian protection standards in Section 17.419; except as allowed by Subsections 17.419.2 through 17.419.5, the riparian setback is 100 feet from the top of bank of a river, stream, or other natural water body.
    • Alterations, replacement, and remodels of existing structures within the 100-foot setback are subject to Subsection 17.501.6 and Section 17.419.

    front setback: 30 feet · side setback: 15 feet · rear setback: 15 feet · riparian setback: 100 feet from top of bank (Except as allowed by Subsections 17.419.2 through 17.419.5)

    “Setback Requirements. The minimum building setback shall be 30 feet front and 15 foot side and rear.”
    2 more reviewed findings on this topic
    • Specified — Buildings and other development in the Forest Management Zone.
      “In the Forest Management Zone, the minimum setback from all property lines shall be 40 feet. However, a larger setback may be required to comply with the siting standards in Subsection 17.303.8 and the fire safety standards in Section 17.426.”
    • Specified — Buildings and development in the Three Rivers Recreation Area Zone.
      “Setback Requirements (Minimum). Front – 30 feet, Side – 15 feet, Rear – 15 feet. Rim setback distance shall be in accordance with the standards in Section 17.412.”
  • Living in an RVTemporary only (with conditions)

    Occupancy of recreational vehicles in Jefferson County zoning areas.

    • A recreational vehicle may not be connected to a subsurface septic system or have permanent utility connections, except in the Three Rivers Recreation Area Zone, the Crooked River Ranch Residential Zone under Section 17.318D, or during construction of a residence under Subsection 17.422.1.D.
    • A recreational vehicle may not be used for permanent habitation.
    • Temporary visitor housing is limited to 60 days in any 12-month period.
    • During construction, the property owner may occupy the recreational vehicle after a building permit is issued; necessary plumbing permits and inspections are required, and the vehicle must be removed if the building permit expires.

    maximum temporary visitor occupancy: 60 days in any 12-month period

    “Temporary Occupancy of Recreational Vehicles. Recreational vehicles do not generally meet Oregon State Structural Specialty Code standards and specifications for permanent residential use. Recreational vehicles may be occupied temporarily subject to the following standards:”
    One more reviewed finding on this topic
    • Temporary only (with conditions) — Seasonal RV or tent camping in the Three Rivers Recreation Area Zone.
      “Seasonal RV and/or tent camping, subject to installation of a septic system or vault toilet and gray water sump constructed to Department of Environmental Quality standards. However, one month after receiving a Certificate of Occupancy for a permanent residence, the property owner must decommission the connection from the recreational vehicle to the septic tank and remove all permanent electrical and other utility hookups from the seasonal RV.”
  • Driveway accessRequired

    Building and septic permit applicants requiring legal access, and new driveways accessing county or local access roads in Jefferson County

    • Evidence of legal physical ingress and egress meeting emergency vehicle access standards is required before issuance of building or septic permits.
    • A driveway connection permit is required before construction of a new driveway accessing a county or local access road.
    • A driveway connection permit is also required before issuance of a building permit for a new, remodeled, or replacement building using an existing driveway that does not meet current Chapter 12.18 standards, unless the Public Works Director authorizes a variation.
    • For access from a state highway, Oregon Department of Transportation approval must be submitted before issuance of the building permit.
    • Access must comply with emergency vehicle access, clear-vision, and Chapter 12.18 standards; applicable city standards apply within an urban growth boundary.
    “A driveway connection permit shall be obtained prior to the construction of any new driveway that accesses a county or local access road.”
  • Building in a floodplainRequired

    Construction and other development within Jefferson County special flood hazard areas identified in the county floodplain overlay regulations

    • A floodplain development permit must be obtained before construction or development begins in the special flood hazard area.
    • The requirement applies to all structures, including manufactured dwellings, and all other development including fill.
    • In Zones A1-30 and AE without a designated regulatory floodway, new construction, substantial improvement, or other development including fill is not permitted unless the cumulative effect will not increase base-flood water-surface elevation by more than one foot at any point in the county.
    • Residential structures in applicable riverine special flood hazard areas must have the lowest floor, including basement, elevated one foot above the base flood elevation.
    • Applications require specified plans and elevation, engineering, watercourse, base-flood, substantial-improvement, and fill/excavation information as applicable.

    maximum allowed cumulative base-flood water-surface increase without designated floodway: <= 1 foot (Zones A1-30 and AE; cumulative effect of proposed and existing/anticipated development) · minimum residential lowest-floor elevation: 1 foot above BFE (applicable riverine non-coastal special flood hazard areas with BFE)

    “A development permit shall be obtained before construction or development begins within any area horizontally within the special flood hazard area established in Subsection 17.316.3.A.”
  • Short-term rentalsLimited

    Vacation rental units in the Camp Sherman Vacation Rental (CSVR) Zone, an unincorporated community area of Jefferson County

    • Approval is by the Planning Director under Administrative Review procedures in § 17.903.4.
    • Site Plan Review standards in § 17.414 and all other CSVR standards apply.
    • The total number of units, including management and employee units, is calculated by multiplying parcel acreage by one; fractions may be rounded to the closest whole number.
    • Maximum building floor area is parcel acreage multiplied by 1,400 square feet.
    • At least one acre of open space is required for each developed acre.
    • The parcel must remain in common ownership and the rental/ownership structure may not allow units, except management and employee housing, to be occupied as a principal residence.
    • Owner occupancy is limited to 30 days per calendar quarter, with at least a one-week break between 30-day periods; units must be available for public rental at least 60 days per year; annual accounting may be required.
    • Reservations must be made through a central reservation and check-in service.
    • Additional standards include recreational/resort orientation, environmental compatibility, buffers, parking, fire safety, lighting, minimum lot size, setbacks, and other CSVR requirements.
    • The county transient lodging tax chapter separately defines short-term rentals and imposes a six percent transient lodging tax, subject to listed exemptions.

    maximum vacation-rental units: per one per parcel acre (fractions may be rounded to closest whole number) · maximum building floor area: per 1,400 square feet per parcel acre · minimum open space: per 1 acre per developed acre · maximum owner occupancy: <= 30 days per calendar quarter (at least one-week break between periods; no more than 30 contiguous days) · minimum public rental availability: >= 60 days per year (management and employee housing excepted)

    “The following uses and their accessory uses may be approved by the Planning Director under the Administrative Review procedures in Subsection 17.903.4”
  • Permit feesVariable (with conditions)

    County system development charges paid with building permit fees for new development and certain redevelopment in Jefferson County

    • SDC costs are calculated based on development type.
    • Single-family dwellings use an established per-dwelling rate.
    • Industrial or commercial development is calculated based on square footage and ITE Manual trip counts adjusted to local conditions.
    • The Board of County Commissioners reviews SDC fees annually.
    • The cited fee schedule is for FY 2024-25.

    per dwelling park SDC: 475.65 USD (FY 2024-25) · per occupant park SDC: 165.75 USD (FY 2024-25) · per dwelling road SDC: 2369.38 USD (FY 2024-25) · per trip road SDC: 246.85 USD (FY 2024-25)

    “SDC costs are calculated based on the development type.”

Oregon rules that apply here

  • Building permitRequired

    Residential construction and specified alterations in Jefferson County under Oregon's statewide building-permit requirements, including detached one- and two-family dwellings.

    • Permits are required for all new construction and specified structural, plumbing, mechanical, and electrical alterations.
    • The state page states that its general descriptions apply only to detached one- or two-family dwellings.
    • Work exempt from a building permit may still require mechanical, electrical, or plumbing permits.
    • Local land-use, planning, zoning, and other local requirements must be considered first.
    • A permit expires if work is not started within 180 days of issuance, or if work is suspended or abandoned for 180 days or more; an extension may be requested from the local building official.

    permit commencement deadline: 180 days (Permit extension may be requested from the local building official.)

    “A building permit is required to construct, enlarge, alter, repair, or move a residential building or structure.”
  • Owner-builder exemptionConditional

    An owner-built single-family residence and adjacent auxiliary structures in Jefferson County, Oregon, where the owner intends to occupy the structures and constructs the structural components personally or with unpaid assistance from friends and relatives.

    • The owner must be the title owner or recorded contract purchaser shown on the last available complete assessment roll.
    • The owner must not have used the ORS 455.320 subsection (2) exemption during the five years before applying.
    • The structural components must be constructed entirely by the owner or by the owner with unpaid assistance from friends and relatives.
    • The exemption is limited to structural-code requirements concerning ceiling heights, room sizes, and maintenance of specific temperature levels.
    • The exemption applies to new construction, renovation, remodeling, or alteration of an owner-built dwelling or outbuilding.
    • A building permit is still issued and must note whether the structure complies with the exempted requirements.
    • If the structure does not comply with the exempted requirements, the owner-builder must file a copy of the building permit with the county clerk for permanent deed recording and provide a property description sufficient to give constructive mortgage-record notice.
    • Noncompliance with the recording requirement does not affect conveyance of an interest in the property.

    prior use lookback period: 5 years (The owner must not have taken advantage of the subsection (2) exemptions during this period.) · exempt structural-code subjects: ceiling heights, room sizes, and maintenance of specific temperature levels

    “(a) “Owner” means the owner of the title to real property or the contract purchaser of real property, of record as shown on the last available complete assessment roll which person has not taken advantage of the exemptions under subsection (2) of this section during the five years prior to applying for an exemption under this section. (b) “Owner-built dwelling and outbuildings” means a single-family residence and adjacent auxiliary structures the structural components of which are constructed entirely by the owner who intends to occupy the structures or by that owner and friends and relatives of the owner assisting on an unpaid basis. (2) Owner-built dwellings and outbuildings shall be exempt from any requirements of the structural code for ceiling heights, room sizes and the maintenance of specific temperature levels in those structures. The exemption shall apply to the new construction, renovation, remodeling or alteration of an owner-built dwelling or outbuilding.”
    One more reviewed finding on this topic
    • Available (with conditions) — Owner-built single-family residences and adjacent auxiliary structures in Oregon where the structural components are constructed entirely by the owner intending to occupy the structures, or by the owner with unpaid assistance from friends and relatives.
      “Owner-built dwellings and outbuildings shall be exempt from any requirements of the structural code for ceiling heights, room sizes”
  • Building code adoptedAdopted (with conditions)

    Residential construction, reconstruction, alteration, repair, and related covered work in Jefferson County under Oregon’s statewide building-code system.

    • The Oregon Residential Specialty Code applies to one- and two-family dwellings and townhouses.
    • The 2023 ORSC administrative provisions were effective and mandatory October 1, 2023.
    • The 2023 ORSC construction provisions, Chapters 2–44 and appendices, were effective October 1, 2023 with a six-month phase-in period and mandatory April 1, 2024.
    • Cities and counties administer a single code throughout Oregon; local administration does not create a separate county building code.
    • The cited ORSC scope includes exceptions and specialized provisions, including the Small Home Specialty Code for dwellings 400 square feet or less and optional local ordinances for certain otherwise-exempt permits.

    ORSC edition: 2023 Oregon Residential Specialty Code · administrative provisions effective and mandatory: 2023-10-01 · construction provisions mandatory: 2024-04-01 (Six-month phase-in began October 1, 2023)

    “The division works with building officials, technical committees, advisory boards, and the public to adopt, amend, and interpret the Oregon Residential Specialty Code (ORSC). This code applies to the construction, reconstruction, and repair of one- and two-family dwellings and townhouses.”
    5 more reviewed findings on this topic
    • Adopted (with conditions) — Residential construction in Jefferson County under Oregon's statewide building-code system, including the Oregon Residential Specialty Code.
      “2023 ORSC - 2021 IRC - Effective Oct. 1, 2023”
    • Adopted (with conditions) — Statewide Oregon building-code requirements applicable to construction in Jefferson County, including residential and commercial structures.
      “2025 Oregon Structural Specialty Code (OSSC) [...] Effective: Oct. 1, 2025 with a *6-month phase-in period / Mandatory April 1, 2026 [...] 2023 Oregon Residential Specialty Code (ORSC) [...] Chapter 1 ~ Effective and mandatory Oct. 1, 2023 [...] Chapters 2 - 44 and appendices ~ Effective Oct. 1, 2023 and mandatory April 1, 2024”
    • Adopted (with conditions) — Oregon State Building Code specialty codes administered statewide by the Oregon Building Codes Division.
      “The Building Codes Division adopts, amends, and interprets specialty codes that make up the Oregon State Building Code.”
    • Adopted (with conditions) — Commercial construction, reconstruction, alteration, and repair governed by the Oregon Structural Specialty Code statewide.
      “Construction provisions: [...] Mandatory April 1, 2026”
    • Adopted (with conditions) — Construction, reconstruction, and repair of one- and two-family dwellings and townhouses governed by the Oregon Residential Specialty Code statewide.
      “2023 Oregon Residential Specialty Code (ORSC) [...] Based on 2021 International Residential Code (IRC)”
  • InspectionsRequired

    Construction performed under a residential building permit in Jefferson County under the Oregon Residential Specialty Code.

    • The permit holder or authorized agent must notify the building official when work is ready for inspection and provide access and means for inspection.
    • Work may not proceed beyond each successive inspection point without building-official approval.
    • Noncomplying portions must be corrected and may not be covered or concealed until authorized.
    • Final inspection occurs after all work required by the building permit is completed.
    “Construction or work for which a permit is required shall be subject to inspection by the building official and such construction or work shall remain accessible and exposed for inspection purposes until approved.”
  • Certificate of occupancyRequired

    Occupancy of new residential dwellings or townhouses and changes in character, use, or occupancy in Jefferson County under the Oregon Residential Specialty Code.

    • A building or structure may not be used or occupied, in whole or in part, until the building official issues a certificate of occupancy for the applicable change in character, use, or occupancy.
    • Certificates of occupancy are not required for work exempt from permits under Section R105.2 or for accessory buildings or structures.
    • For a new residential dwelling or townhouse, a temporary certificate of occupancy may be issued instead.
    • Before issuance for a residential dwelling or townhouse, the general contractor or permit-holding owner must provide specified contractor and license information.
    • A certificate may be revoked in writing when applicable-law violations pose a health or safety threat.
    “Prior to occupancy of a new residential dwelling or townhouse the building official must issue a certificate of occupancy in the form and format established by the Division, unless a temporary certificate of occupancy is issued by the building official.”
  • Zoning districtsPublished (with conditions)

    Statewide Oregon zoning data published by the Department of Land Conservation and Development; the data represents local zoning and does not itself replace local zoning ordinances or maps.

    • The source identifies the dataset as Statewide Zoning - 2023.
    • The source provides downloads through GEOHub and a GIS service.
    • Local governments remain the relevant authorities for parcel-level zoning determinations and ordinance administration.

    dataset year: 2023

    “Statewide Zoning - 2023 Downloads available from GEOHub Service”
  • Minimum dwelling sizeSpecified

    An owner-built single-family residence and adjacent auxiliary structures constructed entirely by the owner intending to occupy them, or by the owner with unpaid assistance from friends and relatives.

    • The owner must not have taken advantage of the ORS 455.320(2) exemptions during the five years prior to applying for the exemption.
    • The exemption applies to structural-code requirements for ceiling heights, room sizes, and maintenance of specific temperature levels.
    • The exemption applies to new construction, renovation, remodeling, or alteration of an owner-built dwelling or outbuilding.
    • The building permit must note whether the structure complies with the exempted requirements; if it does not, the owner-builder must file a copy of the permit with the county clerk for the permanent deed record.
    • The owner must provide the county clerk a property description sufficient to give constructive notice as if contained in a mortgage.
    • The exemption does not eliminate other applicable building-code, permit, inspection, land-use, or utility requirements.

    eligibility lookback: 5 years (The five years prior to applying for an exemption under ORS 455.320.) · covered structural provisions: ceiling heights, room sizes, and maintenance of specific temperature levels

    “Owner-built dwellings and outbuildings shall be exempt from any requirements of the structural code for ceiling heights, room sizes and the maintenance of specific temperature levels in those structures. The exemption shall apply to the new construction, renovation, remodeling or alteration of an owner-built dwelling or outbuilding.”
  • Minimum lot sizeSpecified

    Land in Jefferson County and other Oregon counties zoned exclusive farm use or designated forestland, where ORS 215.780 applies.

    • For exclusive farm use land not designated rangeland, the minimum is 80 acres.
    • For exclusive farm use land designated rangeland, the minimum is 160 acres.
    • For land designated forestland, the minimum is 80 acres.
    • ORS 215.780(2) provides circumstances in which a county may adopt a lower minimum lot or parcel size.

    minimum lot or parcel size: >= 80 acres (EFU land not designated rangeland; forestland) · minimum lot or parcel size: >= 160 acres (EFU land designated rangeland)

    “land zoned for exclusive farm use and not designated rangeland, at least 80 acres”
    One more reviewed finding on this topic
    • Specified — Lots or parcels in Oregon resource-land zones covered by ORS 215.780: exclusive farm use land and designated forestland.
      “Except as provided in subsection (2) of this section, the following minimum lot or parcel sizes apply to all counties: (a) For land zoned for exclusive farm use and not designated rangeland, at least 80 acres; (b) For land zoned for exclusive farm use and designated rangeland, at least 160 acres; and (c) For land designated forestland, at least 80 acres.”
  • Camping on your landAllowed (with conditions)

    Occupancy of a manufactured dwelling or camping vehicle on private land in Oregon.

    • The landowner must consent.
    • The lot, tract or parcel must have adequate area for safe, approved water supply and sewage disposal facilities.
    • The use must not conflict with ORS 446.310 (9).
    • The person must comply with all applicable state or local standards for sanitation, water, plumbing, electrical and sewerage installations.
    “446.125 Occupancy on private land. A person may occupy a manufactured dwelling or a camping vehicle on private land with the consent of the owner of the land if: (1) The lot, tract or parcel of land upon which the manufactured dwelling or camping vehicle is situated has an area adequate to provide safe, approved water supply and sewage disposal facilities and is not in conflict with ORS 446.310 (9). (2) The person complies with all applicable standards of sanitation, water, plumbing and electrical and sewerage installations prescribed by the laws of this state and the rules issued thereunder, or by local authorities.”
  • Manufactured homesAllowed (with conditions)

    Occupancy of a manufactured dwelling on private land in Oregon with the landowner's consent.

    • The lot, tract, or parcel must have adequate area for safe, approved water supply and sewage disposal facilities.
    • The occupancy must not conflict with ORS 446.310(9).
    • The person must comply with all applicable state or local sanitation, water, plumbing, electrical, and sewerage-installation standards.
    “A person may occupy a manufactured dwelling or a camping vehicle on private land with the consent of the owner”
  • Accessory dwellingsLimited

    Accessory dwelling units in areas within an urban growth boundary zoned for detached single-unit dwellings in a city with population greater than 2,500 or a county with population greater than 15,000.

    • The local government must allow at least one accessory dwelling unit for each detached single-unit dwelling.
    • Local regulations may address siting and design but may not include owner-occupancy requirements for the primary or accessory structure or requirements to construct additional off-street parking.
    • Local governments may regulate vacation occupancies to require owner-occupancy or off-street parking.

    city population threshold: > 2500 persons · county population threshold: > 15000 persons · minimum ADUs per detached single-unit dwelling: >= 1 unit

    “A city with a population greater than 2,500 or a county with a population greater than 15,000 shall allow”
  • Who permits septicMixed (with conditions)

    Residential and small-business onsite septic permitting in Jefferson County, where Oregon DEQ rules are administered through a DEQ-authorized local county agent, while DEQ retains responsibility for WPCF-permit systems.

    • DEQ contracts with local jurisdictions in Oregon counties other than Curry, Jackson, and Josephine for residential and small-business septic permitting.
    • The local agent may receive and process applications, issue permits, enforce requirements, and perform required inspections for systems that do not require WPCF permits.
    • DEQ retains responsibility for systems in nonagreement counties and all systems requiring WPCF permits.
    “DEQ may enter agreements with local governmental units authorizing those units to become DEQ's agents for permitting onsite systems, including receiving and processing applications, issuing permits, enforcing, and performing required inspections for onsite systems that do not require WPCF permits. DEQ retains those responsibilities for systems in nonagreement counties and for all systems that require WPCF permits.”
    One more reviewed finding on this topic
    • Mixed — Residential and small-business septic permitting statewide in Oregon.
      “The Oregon Department of Environmental Quality permits residential and small business septic systems in Curry, Jackson, and Josephine counties out of the DEQ Medford Office. In Oregon's other 33 counties, DEQ has contracts with local jurisdictions for residential and small business septic permitting.”
  • Septic permitRequired

    Facilities using septic systems for domestic wastewater disposal statewide in Oregon, including new construction and alterations or repairs of existing septic systems.

    • A construction permit covers new construction and alterations or repairs of existing septic systems and is valid for up to one year.
    • In many areas, the construction permit is issued by a local DEQ agent, typically a county.
    • A WPCF permit is required to construct and operate a system, may be issued for up to 10 years, must be renewed for the life of the system, and may require ongoing monitoring and reporting.
    • A site evaluation is required for an undeveloped site that has never been evaluated for septic approval and may be required to replace an old system at a different property location.
    • An affirmative LUCS is required before DEQ issues a construction permit for new construction and alterations of existing septic systems.

    construction permit validity: <= 1 year · WPCF permit validity: <= 10 years

    “There are two types of permits for facilities that use septic systems [...] Construction permit: This includes permits for new construction and for alterations and repairs”
    3 more reviewed findings on this topic
    • Required — Installation of a new septic system and alteration or repair of an existing septic system in Oregon, including Jefferson County where state onsite rules apply.
      “Septic permits are required to install a new septic system, alter an existing septic system, or repair an existing septic system.”
    • Required — Residential and small-business onsite septic systems in Jefferson County, including new installations, alterations, and repairs.
      “Septic permits are required to install a new septic system, alter an existing septic system, or repair an existing septic system. An onsite program specialist will review the septic permit application materials and make sure conditions of the site evaluation report and rule requirements are met. Once all rule requirements are satisfied, the septic installation permit will be issued and is valid for one year.”
    • Required — Installation of a new septic system, alteration of an existing septic system, or repair of an existing septic system in Oregon, including Jefferson County where onsite wastewater service is provided under Oregon's program.
      “Septic permits are required to install a new septic system, alter an existing septic system, or repair an existing septic system. An onsite program specialist will review the septic permit application materials and make sure conditions of the site evaluation report and rule requirements are met. Once all rule requirements are satisfied, the septic installation permit will be issued and is valid for one year.”
  • Septic inspectionLimited

    Inspections for pressure-distribution, sand-filter, and alternative-treatment-technology septic systems in Oregon, including Jefferson County where state onsite rules apply.

    • Pressure-distribution, sand-filter, and alternative-treatment-technology systems have lists of required inspections.
    • The onsite agent may waive certain inspections.
    • The applicable agent may require startup by a certified operations and maintenance provider for these system types.
    “The agent may still elect to waive certain inspections.”
  • Off-grid sanitationLimited

    Use of composting toilets and related graywater systems in Oregon.

    • A composting toilet does not eliminate all household water; plumbing fixtures still need connection to an approved septic system.
    • If used with a graywater reuse system, both the graywater reuse system and septic system require a DEQ permit.
    • The graywater reuse system must be offline during wet-weather months or when discharges could create a public nuisance.
    • Material removed from a composting toilet must be buried under 12 inches of soil.
    • Buildings within a sewer district still need a sewer connection.

    burial depth for removed composting-toilet material: 12 inches · maximum reduced drainfield capacity mentioned by DEQ: two-thirds (The source says the drainfield may be approved for a smaller capacity, as much as two-thirds the size.)

    “Composting toilets don't eliminate all water generated in a home and therefore you will need to be hooked up to an approved wastewater treatment system.”
    One more reviewed finding on this topic
    • Allowed (with conditions) — Septic-based off-grid domestic wastewater disposal where public sanitary sewer is not legally and physically available, including applicable rural properties in Jefferson County.
      “Septic systems can be a safe wastewater solution for certain properties [...] that do not have public sanitary sewer legally and physically available.”
  • Well permitLimited

    Groundwater use from wells in Jefferson County, Oregon, under Oregon's statewide water-right permitting system.

    • A water-use permit is generally required to use groundwater, but statutory exemptions apply.
    • Single or group domestic use is exempt when it does not exceed 15,000 gallons per day.
    • Stock watering is exempt; water-use limitations may apply for some permitted confined animal feeding operations.
    • Lawn or garden irrigation is exempt only for an area of one-half acre or less; irrigation of larger areas requires a water-use authorization and is not exempt.
    • Beginning January 1, 2026, commercial gardens qualify for an exemption only when they do not exceed one-half acre and use no more than 3,000 gallons per day.
    • Industrial or commercial purposes are exempt only when use does not exceed 5,000 gallons per day, including the 3,000-gallon-per-day cap on commercial gardens of one-half acre or less; the exemption does not allow irrigation or watering to grow marijuana or unregistered hemp plants for commercial purposes.
    • Watering school grounds is exempt only for less than ten acres at schools located within a critical groundwater area.
    • Down-hole heat exchange purposes are exempt for an open-loop heat-exchange hole providing source heat.
    • Fire-control use is exempt for emergency firefighting or certain non-emergency firefighting training.
    • Reuse of recycled water or wastewater for land application is exempt when the water was previously obtained under a permit or certificate and has not been discharged into state waters; relevant Oregon Department of Environmental Quality or Oregon Department of Agriculture permits apply.
    • Each exemption is separate, and one well may serve multiple exempt uses.
    • Exempt groundwater use must be for a beneficial purpose without waste and may be subject to regulation during water shortages.
    • Wells supplying exempt groundwater uses must comply with Oregon minimum well-construction standards for construction, maintenance, and abandonment.
    • New groundwater permits may require mitigation in portions of the Deschutes River Basin.

    domestic exempt-use volume: <= 15000 gallons per day · lawn or garden exempt area: <= 0.5 acre (Larger-area irrigation requires water-use authorization and is not exempt.) · commercial garden exempt area: <= 0.5 acre (Effective beginning January 1, 2026; also limited to no more than 3,000 gallons per day.) · commercial garden exempt-use volume: <= 3000 gallons per day (Applies beginning January 1, 2026 and within the one-half-acre limit.) · industrial or commercial exempt-use volume: <= 5000 gallons per day (Includes the 3,000-gallon-per-day cap on qualifying commercial gardens.) · school-ground exempt area: < 10 acres (Only for schools located within a critical groundwater area.)

    “Groundwater uses exempt from the permitting process include (ORS 537.545): • Group or single domestic use (household): Not exceeding 15,000 gallons per day. • Stock watering: Drinking water for livestock animals. Water use limitations may apply for some permitted confined animal feeding operations. • Irrigation of lawn and/or garden of a half-acre or less: No more than a half-acre in area. Irrigation of larger areas requires a water use authorization and is not exempt. • Beginning Jan. 1, 2026, commercial gardens not exceeding a half-acre and using no more than 3,000 gallons per day will qualify as exempt. • Industrial or commercial purposes: Not exceeding 5,000 gallons per day, including the 3,000 gallon per-day cap on commercial gardens of one half-acre or less. Does not allow irrigation or watering to grow marijuana or unregistered hemp plants for commercial purposes. • Watering school grounds: Less than ten acres for schools located within a critical groundwater area. • Down-hole heat exchange purposes: An open loop heat exchange hole to provide source heat. • Fire control: Withdrawal of water for emergency firefighting or certain non-emergency firefighting training. • Reuse of recycled water or wastewater for land application: Recycled water or wastewater applied to land for irrigation that has been previously obtained under a permit or certificate and has not been discharged into waters to the state. Relevant permits from DEQ or ODA apply. Each exemption is separate, and one well may serve multiple exempt uses.”
    3 more reviewed findings on this topic
    • Required — Construction, alteration, conversion, or abandonment of a water-supply well by a landowner in Jefferson County, Oregon.
      “for each water supply well constructed, altered, converted, or abandoned by a landowner, unless the landowner is a licensed and bonded Water Supply Well Constructor.”
    • Limited — Construction, alteration, conversion, or abandonment of a water-supply well by a landowner in Oregon, including Jefferson County.
      “The Water Resources Commission requires a permit, permit fee, and bond or irrevocable letter of credit, for each water supply well constructed [...] by a landowner”
    • Required — A property owner constructing, altering, converting, or abandoning a water-supply well in Oregon without being a licensed and bonded Water Supply Well Constructor.
      “The Water Resources Commission requires a permit [...] for each water supply well constructed, altered, converted, or abandoned by a landowner”
  • Mandatory utility hookupSewer (with conditions)

    Properties in Oregon located within a city limit, urban growth boundary, sanitary district, or equivalent area, including applicable properties in Jefferson County.

    • Sewer is available when the property is in an area intended for urbanization within a city limit, UGB, or sanitary district.
    • The sewer connection must be accessible by a right-of-way or existing easement to be legally available.
    • The municipality with sewer authority determines whether connection is physically practical, legally available under local ordinances, and supported by system capacity.
    • A written statement from the municipality with sewer authority is required with a septic permit application for property in a city limit, UGB, sanitary district, or equivalent.
    • Emergency septic repairs are not allowed in those areas unless the sewer authority provides written confirmation that sewer is unavailable.
    • If local ordinances do not establish a physical distance, default OAR sewer-availability distances continue to apply.
    • For existing development projected at up to 899 gallons per day, the nearest sewer connection point must be within 200 feet for repair or alteration permits; for construction-installation permits, the nearest connection point must be within 300 feet.

    repair or alteration sewer distance: <= 200 feet (existing development projected at up to 899 gallons per day) · construction-installation sewer distance: <= 300 feet (existing development projected at up to 899 gallons per day)

    “A written statement from the municipality with sewer authority is required with a septic permit application”
    One more reviewed finding on this topic
    • Sewer (with conditions) — A building located within an Oregon sewer district, including a building using a composting toilet.
      “What if my building is within a sewer district? Your building will still need a sewer connection.”
  • Agricultural exemptionAvailable (with conditions)

    Qualifying agricultural buildings, agricultural grading, equine facilities and dog-training facilities under Oregon structural-code law.

    • The exemption is only from the Oregon Structural Specialty Code.
    • Electrical, plumbing and mechanical work remains subject to permits and the applicable specialty codes.
    • An agricultural building must be located on a farm or forest operation and used for the statutory agricultural, forestry, horticultural, animal-husbandry or related purposes.
    • An agricultural building does not include a dwelling; a structure used for a purpose other than growing plants in which 10 or more persons are present at any one time; a structure regulated by the State Fire Marshal; a structure used by the public; or a structure subject to the National Flood Insurance Act provisions identified in ORS 455.315.
    • Incorporated cities may regulate agricultural buildings, equine facilities and dog-training facilities within their boundaries.
    • Additional uses in an agricultural building must be incidental and accessory, personal to the farm owner and immediate family or household, and pose no greater hazard than the listed agricultural uses.

    maximum persons present for qualifying non-growing-plants agricultural structure: < 10 persons (Structures with 10 or more persons present at one time are excluded.)

    “The provisions of this chapter do not authorize the application of a state structural specialty code to any agricultural building, agricultural grading, equine facility or dog training facility.”
    2 more reviewed findings on this topic
    • Available (with conditions) — Agricultural buildings, agricultural grading, equine facilities, and dog-training facilities subject to Oregon's structural-code statute, including qualifying property in Jefferson County.
      “The provisions of this chapter do not authorize the application of a state structural specialty code to any agricultural building, agricultural grading, equine facility”
    • Available (with conditions) — Qualifying agricultural buildings on legally designated farm or forest-use land in Jefferson County; this is a building-code exemption, not a blanket exemption from zoning or land-use review.
      “The exemption is only from the Oregon Structural Specialty Code. Any electrical, plumbing or mechanical work is subject to permit”
  • Subdividing landRegulated (with conditions)

    Subdivisions and partitions in Oregon subject to review under ORS 92.044.

    • Before a plat may be made and recorded, the applicant must submit a written application to the city or county having jurisdiction under ORS 92.042.
    • The application must include a tentative plan showing the general design.
    • The tentative plan must be approved before the plat may be considered for approval.
    • Cities and counties must adopt standards and procedures governing submission and approval, including requirements addressing utilities, streets, minimum lot sizes, safety, light and air, overcrowding, transportation, water, sewerage, drainage, education, recreation and other needs.
    • Applicable local zoning ordinances and regulations remain part of plat approval criteria.

    tentative-plan approval before plat consideration: true (Applies to subdivisions or partitions subject to review under ORS 92.044.) · local standards and procedures: required by city or county ordinance or regulation (Jurisdiction is determined under ORS 92.042.)

    “Before a plat of any subdivision or partition subject to review under ORS 92.044 may be made and recorded, the person proposing the subdivision or partition or authorized agent or representative of the person shall make an application in writing to the county or city having jurisdiction under ORS 92.042 for approval of the proposed subdivision or partition in accordance with procedures established by the applicable ordinance or regulation adopted under ORS 92.044.”
  • Permit processPublished (with conditions)

    Online homeowner building-permit applications through Oregon ePermitting in participating cities and counties.

    • Participation by cities or counties is voluntary.
    • Each participating city or county determines which permits are available for online sale.
    • The applicant creates an account, downloads the homeowner acknowledgement form, searches for the work-site address, enters owner contact details, uploads the form, and enters work details.
    • After submission, the local city or county contacts the applicant when fees are ready to be paid and when the permit has been issued.
    • Applicants may track status, pay fees, upload documents, schedule inspections, and review inspection results after submission.
    “Participation by cities or counties is voluntary and each participating city or county determines which permits are available for sale online.”
  • county zoning authorityGeneral

    Oregon counties adopting and revising comprehensive plans, zoning, subdivision, and other land-use ordinances applicable to county land, including unincorporated areas.

    • The statutory text states an exception for ORS 527.722.
    • Plans and related ordinances may be adopted and revised part by part or by geographic area.
    • Zoning, subdivision, and other ordinances or regulations must be designed to implement the adopted county comprehensive plan.
    • Before a county zoning ordinance has legal effect, the governing body or planning commission must conduct one or more public hearings and publish 10 days' advance public notice; additional notice requirements apply to certain zone changes under ORS 215.223.
    “Except as provided in ORS 527.722, the county governing body shall adopt and may from time to time revise a comprehensive plan and zoning, subdivision and other ordinances applicable to all of the land in the county. The plan and related ordinances may be adopted and revised part by part or by geographic area.”
  • county building authorityGeneral

    Oregon counties administering and enforcing building inspection programs, including issuance and enforcement of building permits for residential construction in areas outside incorporated cities.

    • A county building inspection program is subject to the state building code and the statutory building-inspection-program framework.
    • If a county does not notify the director, or notifies the director that it will not administer and enforce a building inspection program, the director must arrange administration and enforcement through a municipality, other person, state employees, or state agencies; permit and other fees arising therefrom are paid into the Consumer and Business Services Fund.
    • A building inspection program is administered for four-year periods under ORS 455.150; the governing body must provide required notices to the Director of the Department of Consumer and Business Services.
    • The program must specify cooperation with the State Fire Marshal or designee and how a uniform fire code will be considered in design and construction review.
    • The cited archive is the 2015 Oregon Revised Statutes edition; the current official ORS 455 page was identified but returned a 403 error during retrieval.
    “If a city does not notify the director, or notifies the director that it will not administer the building inspection program, the county or counties in which the city is located shall administer and enforce the county program within the city in the same manner as the program is administered and enforced outside the city, except as provided by subsection (6) of this section.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Lot coverage — Lot coverage limits in Jefferson County zoning districts.
  • Building height — Building height limits in Jefferson County zoning districts.
  • Tiny homes — Tiny-home or tiny-home-on-wheels occupancy in Jefferson County, Oregon

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Water rights & wells in Jefferson County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Oregon’s water agency.

Managed area

Groundwater is actively managed here, but a small household well is generally still available.

Household wellExempt — no permit or water right

Single or group domestic groundwater use up to 15,000 gpd is exempt from permitting, but the exemption can be limited inside designated Critical Groundwater Areas.

Limit: 15,000 gpd domestic (plus stockwater and ≤0.5 acre lawn/garden) under ORS 537.545

Oregon Water Resources Department — Exempt Water Uses ↗

Prior-appropriation state (first in time, first in right). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Oregon state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Jefferson County, Oregon

Is Jefferson County a good place to live off-grid or homestead?

Jefferson County scores 65/100 on the Bolthole Index, a strong county profile. Its strengths: sparse surroundings — about 4,443 people within 15 miles and a stronger property-autonomy legal backdrop. Watch-outs: more administrative friction around building and land use.

Do you need a building permit in Jefferson County, Oregon?

Jefferson County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Jefferson County Community Development, On-Site Septic Program (delegated authority under Oregon DEQ). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Jefferson County?

Living in an RV on your own land in Jefferson County is allowed on a temporary basis only: Occupancy of recreational vehicles in Jefferson County zoning areas. A recreational vehicle may not be connected to a subsurface septic system or have permanent utility connections, except in the Three Rivers Recreation Area Zone, the Crooked River Ranch Residential Zone under Section 17.318D, or during construction of a residence under Subsection 17.422.1.D. A recreational vehicle may not be used for permanent habitation. Confirm with the county before relying on it.

How much does land cost in Jefferson County, Oregon?

Land in Jefferson County runs about $1,816 per acre, based on the latest county data.

What is the water situation in Jefferson County?

Jefferson County gets about 18.4" of rain a year, with severe drought in roughly 28.5% of years. On water rights, Jefferson County lies in the Upper Deschutes Basin Groundwater Mitigation Program Area — Established 2002 (~4,500 sq mi); new groundwater uses are allowed but require mitigation for impacts to the Deschutes Scenic Waterway (not a categorical closure)..

How remote is Jefferson County?

A typical private-land location has about 4,443 people within 15 miles and 3,473,554 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Jefferson compares in Oregon

Compare side-by-side →See all 36 Oregon counties ranked →