Bolthole Index

Crook County, Oregon

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

62Index Score / 100
#10 of 36 in Oregon

Unincorporated Crook County, Oregon requires a building permit for a new home, issued through the Crook County Community Development Building Department12. Crook County sets zoning on unincorporated land, while the City of Prineville administers its own zoning within the city and applicable Urban Growth Boundary34. Septic permits, where public sewer is unavailable, come from the county's On-Site Septic Program under authority delegated by Oregon DEQ56.

At a glance

Building permit
Required for a new home; Crook County reviews plans and inspects construction12
Zoning
Present; Crook County regulates unincorporated land, while Prineville administers city and applicable Urban Growth Boundary zoning734
Septic
County permit required for a new, altered or repaired system68
RV living
Limited by zone, duration and permit status; yearlong occupancy is possible while building a permitted home9
Tiny home
No countywide tiny-home occupancy rule confirmed; Planning must classify the unit and proposed use101
Owner-builder
Available, but the exemption is narrow and does not eliminate the building permit1112
Wells
A landowner drilling a water-supply well needs the state permit, fee and financial security13

Who to call

Building permits

Crook County Community Development Building Department

Building permit applications, construction-document review and inspections in Crook County

541-447-3211

bld@crookcountyor.gov

300 NE 3rd Street, Prineville, OR 97754

Online permits →

Planning & zoning

Crook County Community Development Planning Department

Planning applications, parcel zoning, land-use review, setbacks and floodplain questions

541-447-3211

plan@crookcountyor.gov

300 NE 3rd St, Room 12, Prineville, OR 97754

Online permits →

Septic permits

Crook County Community Development On-Site Septic Program

Septic site evaluations, construction permits and installation inspections in Crook County

541-447-3211

onsite@crookcountyor.gov

300 NE 3rd St, Room 12, Prineville, OR 97754

Online permits →

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

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

Yes. Crook County requires a permit before covered residential construction, alteration, repair, relocation or change of occupancy begins14. The county Building Department reviews construction documents against adopted codes and inspects work against the approved documents2. A nonhabitable detached accessory structure can be exempt when it stays within the code's size and height limits, but separate plumbing, electrical or mechanical permits may still apply14. Qualifying agricultural buildings can be exempt from the structural code, but a dwelling never qualifies for that agricultural exemption, and electrical, plumbing and mechanical work remains regulated15. An owner-builder provision is also available, but it only relaxes specified rules for ceiling height, room size and maintaining temperature; the owner still needs a building permit12.

Who issues building permits in Crook County, Oregon, and how do you reach them?

Crook County Community Development Building Department is the permit office for building applications, plan review and construction inspections16. Septic permits and planning approval come from separate Community Development programs, not the Building Department1718. Call 541-447-3211, email bld@crookcountyor.gov, or visit 300 NE 3rd Street in Prineville16. The county directs applicants to Oregon ePermitting for permit-history searches, applications, payments and inspection scheduling16. Building fees are usually collected in stages: the structural plan-review charge is due before examiners review the documents, and remaining fees are invoiced after approval when the permit is ready to issue2. The county's published schedule says fees vary by valuation and review type, with a state surcharge added19. Applications and permits remain active for 180 days, and each approved inspection extends that activity period another 180 days2.

Does Crook County have zoning?

Yes. Crook County has a zoning map and district-based development rules7. The county administers zoning on unincorporated land, while the City of Prineville administers its own zoning within the city and applicable Urban Growth Boundary34. For new parcels, the minimum is 5 acres in R-5 and 10 acres in R-102021. The PBR-20 minimum is 20 gross acres, although qualifying cluster or planned-unit developments may create lots of at least 5 gross acres while maintaining no more than 1 dwelling per 20 gross acres on average22. Rural-residential accessory dwellings require site-plan review, at least 5 acres and an existing or approved primary home; only 1 is allowed, within 100 feet of that home, with no more than 900 square feet of usable floor area23. In R-5 and R-10, buildings may cover at most 30 percent of the lot and reach 30 feet24252627. In R-10 and the EFU districts, side setbacks are 20 feet and rear setbacks 25 feet2829. We could not confirm a minimum dwelling size; ask Planning about the tax lot18.

How do septic permits work in Crook County?

Crook County's On-Site Septic Program administers local septic review under authority granted by Oregon DEQ, specifically for rural development where public sewer is unavailable65. A permit is required to install a new system or alter or repair an existing one8. Start with a site evaluation: the county requires approval before a construction application, and the submission includes a site plan, fees and test holes8. After installation, the County Sanitarian inspects the work; the number of visits depends on system complexity and site conditions30. Only 1.1% of county soils are rated without severe limitations for a conventional drain field, so make septic feasibility an early purchase contingency31. Call 541-447-3211 or email onsite@crookcountyor.gov for the current application path17.

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

Crook County generally allows an RV to be stored or placed, but not used as a dwelling, when a permitted dwelling is on the same lot9. In county residential zones other than SR-1, an owner may stay in a self-contained RV on the owner's parcel for up to 60 days in a 90-day period; a temporary-use permit can cover a stay longer than 60 days but shorter than half a year during a 12-month period9. An RV may also be occupied for up to 1 year on a lot with a valid residence building permit, but it must remain mobile and wastewater must go to an approved septic system or dumping station9. A manufactured dwelling needs final building approval, approved sewage disposal and compliant installation before occupancy; ordinary placement where a dwelling is allowed is limited to units no more than 15 years old, subject to stated exceptions32. Crook County's tiny-home rule remains unconfirmed, so give Planning the unit specifications and tax lot18.

Building a home in Crook County: the steps, in order

  1. Ask the Planning Department to confirm the tax lot's zoning, allowed dwelling type, setbacks, access requirements and any floodplain review1833.
  1. Submit the planning application; Crook County requires planning approval before moving to the next checklist step34.
  1. If needed, submit a road-approach application for access from a county-maintained or public road35.
  1. Complete the septic site evaluation and purchase the septic construction permit before submitting building permits834.
  1. Submit the building application, approved site plan, construction plans, truss information and engineering through the county's process3416.
  1. Keep permitted work exposed for required inspections, and install and obtain approval of the septic system before final building inspection3634.
  1. Obtain the certificate of occupancy before occupying a new dwelling37.

What should you check before buying land in Crook County?

Start with zoning and legal access, then make the purchase contingent on a satisfactory septic site evaluation10358. If division or development of a larger tract is part of the plan, Crook County's subdivision review examines zoning, water supply, sewage disposal, public services and natural hazards38. A short-term rental of a room, vacation home, RV space or campsite in unincorporated Crook County triggers county lodging-tax registration and collection requirements, but tax registration does not settle land-use approval39. Conventional septic conditions are difficult: only 1.1% of county soils are rated without severe drain-field limitations31. Water deserves equal attention because annual precipitation is about 14 inches and severe drought appears in 36.2% of years4041. Check flood review requirements before siting improvements in a special flood-hazard area33.

Watch-outs

  • Planning approval comes first, and the septic construction permit must be purchased before the building-permit submission34.
  • Only 1.1% of Crook County soils are rated without severe limitations for a conventional septic drain field, so verify the specific site before closing31.
  • Do not treat an RV, manufactured home or accessory dwelling as automatically allowed: each has zoning, sanitation, placement or permit conditions tied to the parcel and proposal93223.

Sources

  1. Crook County Building Department (2026 county census)
  2. Building Department, quoted and re-checked
  3. Crook County Planning Commission regular meeting - August 26, 2026, quoted and re-checked
  4. Staff Report for Zone Map Amendment 217-25-000034-PLNG, quoted and re-checked
  5. On-Site Septic, quoted and re-checked
  6. On-Site Septic, quoted and re-checked
  7. Staff Report for Zone Map Amendment 217-25-000034-PLNG, quoted and re-checked
  8. On-Site Septic, quoted and re-checked
  9. Crook County Code § 18.132.080 Recreational vehicle on an individual lot, quoted and re-checked
  10. Staff Report for Zone Map Amendment 217-25-000034-PLNG (2026 county census)
  11. 2023 Oregon Residential Specialty Code - ORS 455.320 reprinted (2026 county census)
  12. 2023 Oregon Residential Specialty Code — Owner-built dwellings, quoted and re-checked
  13. Landowner Constructed Wells, quoted and re-checked
  14. 2023 Oregon Residential Specialty Code — Chapter 1, quoted and re-checked
  15. Oregon Revised Statutes, Chapter 455 (Oregon statewide rule), quoted and re-checked
  16. Crook County Community Development Building Department (crookcountyor.gov)
  17. Crook County Community Development On-Site Septic Program (crookcountyor.gov)
  18. Crook County Community Development Planning Department (crookcountyor.gov)
  19. Crook County Fee Schedule, Fiscal Year 2026-27, quoted and re-checked
  20. Chapter 18.88: Rural Residential Zone, R-5, quoted and re-checked
  21. Chapter 18.92: Rural Residential Zone, R-10, quoted and re-checked
  22. Chapter 18.108: Powell Butte Rural Residential Zone, PBR-20 - Crook County, OR, quoted and re-checked
  23. Crook County Code Chapter 18.124.140 accessory dwelling units, quoted and re-checked
  24. Chapter 18.88: Rural Residential Zone, R-5 - Crook County, OR, quoted and re-checked
  25. Chapter 18.88: Rural Residential Zone, R-5 - Crook County, OR, quoted and re-checked
  26. ecode360.com, quoted and re-checked
  27. ecode360.com, quoted and re-checked
  28. Chapter 18.92: Rural Residential Zone, R-10, quoted and re-checked
  29. Chapter 18.16: Exclusive Farm Use Zones, quoted and re-checked
  30. On-Site Septic, quoted and re-checked
  31. 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
  32. Crook County Code Chapter 18.132 manufactured dwelling provisions, quoted and re-checked
  33. Crook County Board of Commissioners Agenda Packet, quoted and re-checked
  34. Development Checklist, quoted and re-checked
  35. Development Checklist, quoted and re-checked
  36. 2023 Oregon Residential Specialty Code — Inspections and Certificate of Occupancy, quoted and re-checked
  37. 2023 Oregon Residential Specialty Code — Inspections and Certificate of Occupancy, quoted and re-checked
  38. Ordinance 357 and amendments to Crook County Code, quoted and re-checked
  39. Transient Room Tax, quoted and re-checked
  40. Annual precipitation: Bolthole Index county data
  41. Share of years in severe drought: Bolthole Index county data

Written October 9, 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, Crook County requires a building permit for a home.

RuleCrook CountyWheeler CountyDeschutes CountyJefferson CountyGrant CountyLake CountyHarney County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Community Development On-Site Septic ProgramOR DEQ Onsite Wastewater ProgramCounty Community DevelopmentCounty Community DevelopmentCounty Planning Dept.County Building Dept.County Onsite Sanitation

County locator

Crook County in Oregon

62
County map
Crook County highlighted among the Oregon counties · colored by Index score

How Crook County scores

Seclusion76100% ev.
Self-Sufficiency40100% ev.
Admin Boringness42100% ev.
Durability48100% ev.
Property Autonomy72100% ev.
Carry Cost70100% 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 →

$482kTypical home
0.6%Property tax
$1,808Land / acre
14"Annual rain
36.2% of yrsSevere drought
2.5 / yr (+2.2)Mid-century 100°F days
34.2 daysMid-century dry spell
0.87" (+6.8%)Mid-century 1-day rain
1.16×Wildfire change factor
100%Forward climate coverage
$1,387Home insurance / yr
5% / yrInsurance growth
0.82%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,198Radius comparison (15 mi)
9People / sq mi
49.9%Federal land
63.1%Land at 15% slope or less
1.1%Soils rated "not limited" for septic (strict USDA rating)
20,313 acWorkable land screen
30.6%Wooded land
20.4 tonsBiomass / forest ac
46.1°FAvg temp

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Cities and towns in Crook 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.

Answers from the rulebook for Crook County

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

Crook County rules

  • Building code adoptedAdopted (with conditions)

    Building-code administration by the Crook County Building Department for building permit applications and construction inspections in Crook County.

    • The Building Department reviews construction documents for compliance with Crook County's adopted building codes and inspects construction against approved documents.
    • For stick-built dwellings, mechanical plans must be submitted with structural plans and the page directs applicants to the 2021 Oregon Residential Specialty Code.
    • For property in the Parks and Recreational district, a Parks and Recreation fee is required before issuance of a dwelling or manufactured-home permit; the fee is obtained from the City of Prineville.
    • Building permit fees are generally split into a structural plan-review payment before examination and remaining fees when plans are approved and ready for issuance.
    • Applications and permits are active for 180 days, and each approved inspection extends the permit another 180 days.
    • Inspections generally occur on the next business day unless a later date is requested, with inspection times from 8 a.m. to 4 p.m.

    permit activity period: 180 days (Each approved inspection extends the permit for another 180 days.)

    “We, the Building Department, process your building permit applications, review your construction documents to ensure it meets Crook County's adopted building codes, and inspect your construction to verify it is being constructed to your approved construction documents.”
  • County-wide zoningPresent (with conditions)

    Crook County zoning regulation, including county zoning districts and zoning-map amendments.

    • The county zoning map identifies zone boundaries.
    • Zone-map amendments are prepared by authority of the Planning Commission and maintained by the County Clerk.
    • Specific land uses and development standards depend on the applicable zoning district and other applicable criteria.
    “The boundaries of the zones listed in this title are indicated on the Crook County zoning map, which is hereby adopted by reference. The boundaries shall be modified in accordance with zoning map amendments, which shall be adopted by reference.”
  • Local zoningVaries (with conditions)

    Zoning coverage across Crook County: Crook County zoning applies in county-regulated areas, while the City of Prineville administers its own zoning and land-development ordinance within the city and applicable Urban Growth Boundary.

    • This is an aggregate countywide claim and does not mean Crook County administers every local ordinance.
    • Within Prineville, the city’s own zoning ordinance and zoning map apply.
    • Applicable district, map, development-approval, and other land-use conditions must be checked for the specific property.
    “For the purposes of this chapter, the city of Prineville and the applicable Urban Growth Boundary (UGB) area are divided into zones designated as follows:”
    3 more reviewed findings on this topic
    • Present (with conditions) — County-administered zoning for land reviewed under Crook County Code Title 18, including rural residential and exclusive farm use zones.
      “Code Enforcement is responsible for enforcing the Solid Waste and Development Code for Crook County. Our jurisdiction covers all unincorporated areas of Crook County and some urban growth areas. Please note: we do not respond to complaints for properties within any city limits of Prineville.”
    • Present (with conditions) — Crook County-administered land-use and zoning controls in unincorporated areas and some urban growth areas.
      “codes that govern land use [...] all unincorporated areas of Crook County”
    • Varies (with conditions) — Countywide aggregate of local zoning: county-administered zoning and land-use controls apply in unincorporated areas and some urban growth areas, while properties within Prineville city limits are outside the county's stated enforcement jurisdiction.
      “we do not respond to complaints [...] within any city limits of Prineville.”
  • Zoning districtsPublished (with conditions)

    Crook County Title 18 zoning districts and overlays governing unincorporated county land.

    • The zoning title establishes multiple district chapters and a flood plain combining zone.
    • District-specific use, dimensional, and approval standards apply by zone.
    • The City of Prineville and other incorporated jurisdictions may have separate municipal rules.
    “Chapter 18.28 FOREST ZONE, F-1 [...] Chapter 18.32 RURAL SERVICE CENTER ZONE, RSC”
  • Minimum lot sizeDistrict specific (with conditions)

    New parcels in Crook County's Powell Butte Rural Residential PBR-20 Zone.

    • The standard minimum is 20 gross acres, including adjacent street right-of-way that would accrue to the property if vacated.
    • The county may approve a smaller minimum for lots in cluster or planned unit developments only when the land was designated for rural residential development by Powell Butte Ordinance No. 130 and Ordinance No. 132, Amendment No. 1.
    • Under that exception, new lots must be at least five gross acres.
    • Average development density may not exceed one dwelling per 20 gross acres.
    • Open space must be deeded to the subdivision's homeowners' association or a public entity.

    minimum property size: >= 20 gross acres (Cluster or planned unit developments meeting all listed conditions may have lots of at least five gross acres.) · exception minimum lot size: >= 5 gross acres (Only for qualifying cluster or planned unit developments.) · maximum average density: 1 dwelling per 20 gross acres (Applies to the qualifying cluster or planned unit development exception.)

    “The minimum property size for a new parcel shall be 20 gross acres in size, including street right-of-way adjacent to the property that would accrue to the property if vacated. Notwithstanding the 20-acre minimum lot size, the county may approve a smaller minimum lot size for lots in cluster or planned unit developments under the following conditions: (1) The land was designated for rural residential development by Powell Butte Ordinance No. 130 and Ordinance No. 132, Amend. No 1; (2) The new lots must be a minimum of five gross acres in size; (3) The average density of the development may not exceed one dwelling per 20 gross acres; and (4) Open space areas shall be deeded to the subdivision's homeowners' association or to a public entity.”
    3 more reviewed findings on this topic
    • District specific (with conditions) — New parcel creation in Crook County's unincorporated R-5 Rural Residential zone.
      “The minimum property size for a new parcel shall be five acres in size.”
    • District specific (with conditions) — New parcel creation in Crook County's unincorporated R-10 Rural Residential zone.
      “The minimum property size for a new parcel shall be 10 acres in size.”
    • District specific (with conditions) — New parcel creation in Crook County's unincorporated RR(M)-5 Recreation Residential Mobile zone.
      “In an RR(M)-5 zone, the following lot size shall apply: The minimum property size for a new parcel shall be five acres in size.”
  • SetbacksSpecified

    Structures in the unincorporated R-10 zoning district

    • Front yard is 100 feet when adjacent to an intensive agriculture use; otherwise 20 feet from a local minor collector or marginal access street ROW, 30 feet from a major collector ROW, and 80 feet from an arterial ROW.
    • Each side yard is 20 feet, 30 feet on the street side of a corner lot or parcel, and 100 feet when adjacent to intensive agriculture.
    • Rear yard is 25 feet, or 100 feet when adjacent to intensive agriculture.

    front yard adjacent to intensive agriculture: 100 feet · front yard on local minor collector or marginal access street ROW: 20 feet · front yard on major collector ROW: 30 feet · front yard on arterial ROW: 80 feet · side yard: 20 feet (30 feet on the street side of a corner lot or parcel; 100 feet when adjacent to intensive agriculture) · rear yard: 25 feet (100 feet when adjacent to intensive agriculture)

    “Each side yard shall be a minimum of 20 feet”
    One more reviewed finding on this topic
    • Specified — Structures in the unincorporated EFU-1, EFU-2, and EFU-3 zoning districts
      “Rear setback shall be a minimum of 25 feet from property line.”
  • Lot coverageSpecified

    Main and accessory buildings in the unincorporated R-10 zoning district

    • The combined coverage of the main building and accessory buildings may not exceed the stated percentage of total lot area.

    maximum lot coverage: <= 30 percent of total lot area

    “shall not cover in excess of 30 percent of the total lot area.”
    2 more reviewed findings on this topic
  • Building heightSpecified

    Buildings and structures in the Crook County R-5 zone

    • The limit applies to buildings, structures, and enlargements.

    maximum stories: <= 2 stories · maximum height: <= 30 feet

    “Building Height. No building or structure, nor the enlargement of any building or structure, shall be hereafter erected to exceed two stories or more than 30 feet in height.”
    2 more reviewed findings on this topic
    • Specified — Buildings and structures in the Crook County SR-1 zone
      “Building Height. No building or structure nor the enlargement of any building or structure shall be hereafter erected to exceed two and one-half stories or more than 35 feet in height, except hospitals, public schools, or churches, which may be increased in height to three stories or 45 feet.”
    • Specified — Buildings and structures in the unincorporated R-10 zoning district
      “shall be hereafter erected to exceed two stories or more than 30 feet in height.”
  • Living in an RVLimited

    Residential or dwelling use of recreational vehicles on lots or parcels subject to Crook County zoning.

    • An RV may generally only be stored or placed, and not lived in or used as a dwelling, when a permitted dwelling is also on the same parcel or lot.
    • In the county's residential zones, excluding the SR-1 suburban residential zone, an individual may stay in a self-contained RV on an individually owned parcel or lot for up to 60 days in a 90-day period.
    • An RV may be occupied for no more than one year when placed on a lot for which a valid building permit for a residence has been issued.
    • In the county's residential zones, excluding SR-1, an individual may stay in a self-contained RV for more than 60 days but less than six months over a 12-month period only after issuance of a temporary use permit by the Crook County community development department.
    • The RV may not be placed on a permanent foundation and must remain readily mobile at all times.
    • All wastewater must be properly disposed of in an approved septic system or dumping station.
    • The current codified text does not include the previously reported CCR, setback, or multiple-department-permit sentences.

    maximum stay under first residential-zone exception: 60 days in a 90-day period (SR-1 zone excluded) · maximum occupancy with residence building permit: 1 year · temporary-use-permit occupancy period: more than 60 days but less than six months over a 12-month period (SR-1 zone excluded; temporary use permit required)

    “an individual may stay in a self-contained RV on a parcel or lot owned by the individual for up to 60 days in a 90-day period;”
  • Manufactured homesLimited

    Placement and occupancy of manufactured dwellings in Crook County, including individual lots and permitted manufactured-dwelling parks.

    • A manufactured dwelling on an individual lot must meet state or federal construction requirements applicable at the time of construction.
    • The dwelling must be installed under Chapter 15.04 CCC; wheels, axles, hitch mechanisms, and transient lights must be removed; required skirting and utility connections must comply with county requirements; FEMA standards apply in designated flood plains; and required off-street parking must be completed within 90 days after placement.
    • Before occupancy, the dwelling must pass the building department’s final inspection and connect to sanitary sewage disposal approved by the environmental health department or Oregon DEQ.
    • The dwelling may be used only as a residential dwelling, not for storage.
    • Manufactured dwellings constructed no more than 15 years before the application date are permitted where a dwelling is allowed.
    • Dwellings constructed more than 15 years before application are not allowed for placement except under the stated subsection (4)(b) exception or by exception from the Community Development Director.
    • Manufactured dwellings lawfully manufactured at the time of construction are allowed in permitted mobile-home parks.
    • Manufactured dwellings are prohibited in historic districts or on historic sites.
    • Manufactured dwellings may be allowed as replacement or upgrades of existing nonconforming dwellings under CCC 18.156.010.

    maximum age for ordinary individual-lot placement: <= 15 years before date of application (Where a dwelling is allowed; older units may qualify under subsection (4)(b) or by Community Development Director exception.) · off-street parking completion: 90 days after placement (Required by CCC 18.128.010(1)(a).)

    “The manufactured dwelling shall meet the state and/or federal construction requirements in effect at the time of construction.”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units in Crook County rural residential zones where the ADU is permitted by zoning.

    • Site plan review is required.
    • The lot or parcel must be at least five acres.
    • At least one single-family dwelling must already be sited or approved by the planning department.
    • The parcel may not be in an urban reserve area.
    • Sanitation and wastewater requirements must be satisfied.
    • The ADU must comply with applicable rural-residential development standards; if adjacent to EFU or F-1 land, it must be at least 100 feet from the boundary of that farm or forest-zoned property.
    • The existing dwelling and ADU may not be separated by subdivision, partition, or other division.
    • Only one ADU is allowed per qualifying lot or parcel.
    • The ADU must be within 100 feet of the existing single-family dwelling and may not exceed 900 square feet of usable floor area.
    • Additional fire-protection access, evacuation, water-supply, wildfire, and no-vacation-occupancy requirements apply as specified in CCC 18.124.140(2)(b).

    minimum qualifying lot or parcel size: >= 5 acres · maximum distance from existing single-family dwelling: <= 100 feet (Measured from a wall of the single-family dwelling to the nearest part of the ADU usable floor area.) · maximum usable floor area: <= 900 square feet · farm or forest boundary setback: >= 100 feet (Applies when the ADU lot or parcel is adjacent to land zoned primarily for EFU or F-1 use.)

    “Accessory dwelling units, as defined in CCC 18.08.010, where permitted by zoning within rural residential zones, are subject to site plan review and the following standards:”
  • Who permits septicCounty

    On-site septic regulation and permitting in Crook County.

    • The County acts through authority granted by the Oregon Department of Environmental Quality.
    • The County must apply DEQ regulations and requirements, which can change over time.
    • The program is used for rural development where no public sewer is available.
    “The On-Site Septic Program, sometimes referred to as On-Site Sanitation, or just On-Site Program, is administered by the County through authority granted by the State's Oregon Department of Environmental Quality (DEQ).”
  • Septic permitRequired

    New, altered, or repaired septic systems under Crook County's On-Site Septic Program.

    • The program applies to rural development where no public sewer is available.
    • A site evaluation must be completed and approved before the construction application can be made.
    • The site evaluation application includes fees, a site plan map, and a minimum of three test holes.
    • The construction application includes fees and is specific to the approved system type.
    • The County must apply DEQ regulations and requirements, which can change over time.
    • The state DEQ page states the installation permit is valid for one year.

    permit validity: 1 year

    “Septic permits are required to install a new septic system, alter an existing septic system, or repair an existing septic system.”
  • Septic inspectionRequired

    Inspection of septic systems installed through Crook County's On-Site Septic Program.

    • Inspections occur after the construction application and installation process.
    • The County Sanitarian conducts the inspections to verify proper installation.
    • The number of inspections depends on system complexity and physical site features.
    • The simplest systems usually require one or two inspections.
    • More complicated systems, such as sand filters, may require multiple inspections.

    usual inspections for simplest systems: 1-2 inspections

    “Lastly, a series of inspections is conducted by the County Sanitarian to ensure the system is installed properly by measuring such items as slope across the septic lines and the elevation of the tank.”
  • Off-grid sanitationLimited

    On-site sanitation systems for rural development in Crook County where no public sewer is available.

    • The program is administered by Crook County under authority granted by the Oregon Department of Environmental Quality, and the County must apply DEQ regulations and requirements.
    • The County states that the program is used for rural development where no public sewer is available.
    • State land-use laws limit these types of public facilities in rural zones; the County states that on-site septic is the only established and approved method of sewerage disposal in those areas.
    • A site evaluation is required before construction authorization.
    • The site-evaluation application must include applicable fees, a site-plan map showing the desired system location, and a minimum of three test holes in the desired system area.
    • After an approved site evaluation, a construction application with fees specific to the approved system type may be submitted.
    • County Sanitarian inspections are conducted to verify proper installation, including septic-line slope and tank elevation.
    • The number of inspections depends on system complexity and site conditions; simple systems usually require one or two inspections, while complicated systems such as sand filters may require multiple inspections.
    • The County states that requirements can change through time.
    • In urban areas such as incorporated cities, public sewer is typically available and is the system of choice for higher-density development.

    minimum test holes: >= 3 holes (For the site-evaluation application.)

    “The On-Site Septic Program is utilized for rural development where no public sewer is available. [...] The program requires two (2) primary steps to legally establish a system associated with rural zone development. First, a site evaluation must be performed using specific criteria or rules.”
  • Mandatory utility hookupConditional

    Sanitary wastewater disposal for rural development in Crook County.

    • On-site septic is used where no public sewer is available.
    • In urban areas, including incorporated cities, a public sewer system is typically available and is the system of choice for higher-density development.
    • This claim does not identify municipal sewer connection requirements or fees.
    “The On-Site Septic Program is utilized for rural development where no public sewer is available.”
  • Agricultural exemptionConditional

    Agricultural uses and agricultural buildings in the unincorporated EFU-1, EFU-2, and EFU-3 zoning districts

    • Farm use is listed as allowed in the EFU use table, subject to the chapter's general provisions.
    • Agricultural buildings customarily provided in conjunction with farm use are subject to site-plan review and administrative review.
    • If the use is on high-value farmland, the chapter and OAR Division 33 requirements apply.
    • This claim establishes a conditional land-use allowance, not an exemption from state or county building-code permits.
    “Agricultural buildings customarily provided in conjunction with farm use. | STS | Administrative”
  • Subdividing landRegulated (with conditions)

    Tentative subdivisions in unincorporated Crook County.

    • The subdivision review committee reviews all tentative subdivision plans and provides comments or recommendations to the planning commission for inclusion in the staff report.
    • Review considers preliminary plat requirements, conformance to the zoning ordinance, water supply, sewage disposal adequacy or soil capability for subsurface sewage disposal, public services, natural hazards, agricultural and forestry impacts, and other listed factors.
    • A subdivision conference with the subdivision review committee, subdivider or authorized agent, and engineer or surveyor is scheduled before submittal to the commission.
    “The director shall schedule a meeting with the subdivision review committee and the subdivider or his authorized agent and engineer or surveyor prior to submittal to the commission.”
  • Driveway accessRequired

    Access from a county-maintained or public road for development in Crook County.

    • A road approach is required if applicable to the proposed access.
    • The road approach may be submitted with the planning application or before planning approval.
    • The fee varies according to the fee schedule.
    “Road Approach (if required): For access from a County Maintained or public road.”
  • Building in a floodplainRequired

    Development permits for property in a mapped floodway or area of special flood hazard in Crook County.

    • The floodplain administrator reviews all development permits.
    • All chapter, local, state, and federal permit requirements must be satisfied.
    • Floodway provisions apply when the development is located in a floodway.
    • Review also addresses areas of special flood hazard, available base flood elevation data, substantial improvement, watercourse alteration, placement of fill, and excavation.
    • The county fee schedule separately lists a $195 floodplain development review fee effective July 1, 2026.

    floodplain development review fee: 195 USD (effective July 1, 2026)

    “§ 18.85.080 Establishment of development permit. [...] All development within special flood hazard areas is subject to the terms of this chapter”
  • Short-term rentalsLimited

    Rooms, vacation homes, RV spaces, campsites, and similar overnight accommodations rented for fewer than 30 consecutive days in unincorporated Crook County.

    • Operators must collect an 8.5% transient lodging tax.
    • Operators must register with the County Tax Administrator within 15 days of starting business and display the certificate.
    • Operators must file returns and payments by the 15th of each month for the prior month's rentals; returns received after the 16th are delinquent.
    • Long-term stays of 30 days or more, rentals costing less than $4 per day, certain medical or residential-care lodging, and lodging within Prineville city limits are excluded from this county tax.
    • The tax page establishes tax administration and does not by itself resolve all zoning or land-use approval requirements.

    transient lodging tax: 8.5 percent of rent · registration deadline: 15 days after starting business · transient stay threshold: < 30 consecutive days (30 days or longer is excluded from the tax)

    “If you rent out rooms, vacation homes, RV spaces, or campsites in unincorporated Crook County, you must collect an 8.5% Transient Lodging Tax”
  • Permit feesPublished (with conditions)

    Crook County Community Development building and development permits.

    • The fee schedule is effective July 1, 2026.
    • Structural permits use valuation as determined by the ICC Valuation Table current as of April 1 of each year.
    • A 12% Oregon state surcharge is added to building permit fees.
    • Fees vary by permit type, valuation, project characteristics, and applicable reviews.

    minimum structural permit fee: 126 USD (plus applicable state surcharge) · structural plan review: 75 percent of structural permit fee · floodplain development review: 195 USD · advanced planning fee: 0.3 percent of building valuation (maximum $105,000; waived for projects under $300,000)

    “CD - Building Services Structural Permits: Plus applicable State Surcharge”
  • Permit processPublished (with conditions)

    Residential development and building permit applications in Crook County.

    • Only complete applications are accepted.
    • Planning approval must precede the next checklist step.
    • A road approach may be submitted with the planning application or before planning approval when required.
    • The septic construction permit must be purchased before building permits can be submitted.
    • The septic system must be installed and approved before final building inspection approval.
    • Building applications require construction/building plans, truss specifications, layouts, engineer calculations, and an approved site plan; proof of SDC and/or Parks and Recreation payment is required before issuance when applicable.
    • Applications, payments, and inspection scheduling are available through Oregon ePermitting.
    “Planning must be approved prior to moving to the next step.”

Oregon rules that apply here

  • Building permitRequired

    Residential construction and regulated building, occupancy, gas, and mechanical-system work in Crook County, including unincorporated areas, subject to Oregon’s statewide residential specialty code.

    • The owner or authorized agent must apply to the building official and obtain the required permit before covered work begins.
    • Permits are not required for listed exempt work, including nonhabitable one-story detached accessory structures not exceeding 200 square feet and 15 feet in height; on parcels of at least 2.0 acres located at least 20 feet from property lines and regulated structures, that accessory-structure exemption may extend to 400 square feet.
    • Other listed exemptions include certain sidewalks, slabs, driveways, cosmetic work, pools, playground equipment, limited porch/deck/patio covers, certain awnings, nonbearing partitions, siding repairs, low decks, masonry repair, gutters, qualifying door/window replacements, qualifying reroofing, and certain membrane-covered frame structures.
    • Partitions creating habitable space or requiring fire resistance are not exempt. Permits remain required for specified structural-member changes, fire-resistance-rated doors or windows, wildfire-hazard-zone reroofing, townhouses, and photovoltaic roof coverings.
    • Separate plumbing, electrical, and mechanical permits may still be required for otherwise exempt work. New construction and substantial improvements in areas designated by the floodplain administrator must minimize flood damage under the stated code, FEMA regulations, and ASCE 24.

    detached accessory structure exemption area: <= 200 sq ft (May increase to 400 sq ft on a parcel of at least 2.0 acres with a minimum 20-foot separation from property lines and regulated structures) · detached accessory structure exemption height: <= 15 ft (Measured from grade plane to average height of highest roof surface) · qualifying parcel area for larger accessory exemption: >= 2 acres (Structure must also be at least 20 feet from property lines and regulated structures) · qualifying deck or patio cover area: <= 200 sq ft (Must be at least 3 feet from lot lines) · qualifying deck walking-surface height: <= 30 in (Measured above adjacent grade within 3 feet horizontally) · qualifying membrane-covered frame structure area: <= 500 sq ft (Must be nonhabitable, one story, and at least 3 feet from a lot line)

    “R105.1 Required. Any owner or owner’s authorized agent who intends to construct, enlarge, alter, repair, move or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any gas or mechanical system, the installation of which is regulated by this code, or to cause any such work to be performed, shall first make application to the building official and obtain the required permit.”
  • Owner-builder exemptionAvailable (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.

    • The owner must be the recorded title owner or contract purchaser shown on the last available complete assessment roll.
    • The owner must not have used the subsection (2) exemptions during the five years before applying again.
    • The exemption applies only to structural-code requirements for ceiling heights, room sizes, and maintenance of specific temperature levels.
    • It applies to new construction, renovation, remodeling, or alteration of an owner-built dwelling or outbuilding.
    • A building permit must be issued and must note whether the owner-built dwelling or outbuilding complies with the exempted requirements.
    • If the structure does not comply with those requirements, the owner-builder must file a copy of the building permit with the county clerk for permanent deed records and provide a legally sufficient property description.
    • Noncompliance with the filing requirement does not affect conveyance of an interest in the property.

    prior use lookback: 5 years (The owner must not have previously taken advantage of the subsection (2) exemptions during that period.)

    “Owner-built dwellings and outbuildings shall be exempt from any requirements of the structural code for ceiling heights, room sizes”
    One more reviewed finding on this topic
    • Conditional — Owner-built single-family dwellings and adjacent auxiliary structures in Crook County constructed for occupancy by the owner.
      “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.”
  • InspectionsRequired

    Construction or work in Crook County for which an Oregon residential building permit is required.

    • Inspection applies to work for which a permit is required; permit-exempt work is outside this inspection requirement.
    • The work must remain accessible and exposed until approved, and the permit applicant must provide access and means for inspection.
    • Required inspections include foundation, slab or under-floor, mechanical and gas systems, framing and masonry, insulation and vapor retarder, and final inspection, subject to the stated exceptions.
    • Work may not proceed beyond each successive inspection point without building-official approval.
    • Floodplain inspections and document submissions are determined by the floodplain administrator.

    final inspection timing: after all work required by the building permit is completed

    “R109.1 General. 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 occupancyLimited

    New residential dwellings and townhouses in Crook County, including unincorporated areas, before occupancy.

    • Prior to occupancy of a new residential dwelling or townhouse, the building official must issue a certificate of occupancy unless a temporary certificate of occupancy is issued.
    • Certificates of occupancy are not required for work exempt from permits under Section R105.2 or for accessory buildings or structures.
    • Before issuance, the general contractor or owner issued the structural permit must provide contact and relevant license information for the general, electrical, HVAC, and plumbing contractors that performed work.
    • A temporary certificate may be issued before all work is complete if the portion can be occupied safely, and the building official sets its validity period.
    • The certificate may be revoked in writing when the dwelling or townhouse violates applicable law posing 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.”
  • 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.”
  • 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.”
  • Well permitLimited

    Water-supply wells constructed, altered, converted, or abandoned by a landowner in Crook County, subject to Oregon statewide well-construction rules.

    • A landowner permit, permit fee, and bond or irrevocable letter of credit are required before work unless the landowner is a licensed and bonded Water Supply Well Constructor.
    • The application must include owner information, surety information, proposed location by township, range, section, tax lot if assigned, and street address, proposed use, type of work, and a Department-approved well design plan.
    • The bond or irrevocable letter of credit amount is $10,000.
    • The permit fee is $550.
    • Only the owner of record, an immediate family member of the owner of record, or a full-time employee of the owner of record whose main duties are other than well construction may operate a drilling machine under a landowner permit.
    • The permit expires six months after issuance.
    • A water well report is due within 30 days of permit expiration or within 30 days of well completion, whichever occurs first.
    • The Department may deny a permit for a health threat, health hazard, contamination source, or groundwater waste.

    landowner bond or irrevocable letter of credit: 10000 USD · permit fee: 550 USD · permit duration: 6 months · water well report deadline: 30 days (after permit expiration or well completion, whichever occurs first)

    “The Water Resources Commission requires a permit, permit fee, and bond or irrevocable letter of credit, 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.”
    One more reviewed finding on this topic
    • 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”
  • 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.

  • Tiny homes — Occupancy of tiny homes or tiny homes on wheels as dwellings in unincorporated Crook County.

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 Crook 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 Crook County, Oregon

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

Crook County scores 62/100 on the Bolthole Index, a solid county profile. Its strengths: sparse surroundings — about 1,198 people within 15 miles and a stronger property-autonomy legal backdrop. Watch-outs: weak self-sufficiency basics: only 14″ of rain a year, in severe drought 36.2% of years and more administrative friction around building and land use.

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

Crook County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Crook County Community Development On-Site Septic Program (delegated authority from 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 Crook County?

Living in an RV on your own land in Crook County is limited to specific cases: Residential or dwelling use of recreational vehicles on lots or parcels subject to Crook County zoning. An RV may generally only be stored or placed, and not lived in or used as a dwelling, when a permitted dwelling is also on the same parcel or lot. In the county's residential zones, excluding the SR-1 suburban residential zone, an individual may stay in a self-contained RV on an individually owned parcel or lot for up to 60 days in a 90-day period. Confirm with the county before relying on it.

How much does land cost in Crook County, Oregon?

Land in Crook County runs about $1,808 per acre, based on the latest county data.

What is the water situation in Crook County?

Crook County gets about 14" of rain a year, with severe drought in roughly 36.2% of years. On water rights, Crook 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 Crook County?

A typical private-land location has about 1,198 people within 15 miles and 2,540,848 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Crook compares in Oregon

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