Bolthole Index

Coos County, Oregon

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

62Index Score / 100
#13 of 36 in Oregon

Unincorporated Coos County, Oregon requires a building permit for most new construction, additions, alterations and repairs, issued by Coos County Community Development under Oregon specialty codes12. County zoning applies outside incorporated cities, where each city sets its own3. Septic permits and inspections come from the county's Onsite Septic Program under Oregon DEQ rules45. Coos Bay and North Bend issue structural and mechanical permits inside their limits, and Lakeside runs its own building department1.

At a glance

Building permit
Required for most work in county-administered areas1
Zoning
Yes, county zoning applies outside incorporated cities; each city zones its own land3
Septic
County permits and inspects; Oregon DEQ regulates system standards45
RV living
Short-term only: guest stays capped at 60 days/year, owner or family camping capped at 45 days/year with no more than 2 RVs6
Owner-builder
No general permit waiver; a narrow structural-code exemption may apply7
Accessory dwelling unit
Rural and urban ADUs have separate size and siting standards89
Wells
Landowner well permit required ($550 fee, $10,000 bond) unless a licensed well constructor does the work10
Rural Residential lot size
Generally 5 acres in RR-5 and 2 acres in RR-2, with limited exceptions11
Floodplain
Floodplain application must be approved before building in a mapped special flood hazard area12

Who to call

Building permits

Coos County Community Development

Building/structural permits, land-use planning, onsite septic and code enforcement for unincorporated Coos County (structural and mechanical permits inside Coos Bay and North Bend go through those cities, and Lakeside runs its own separate building department)

541-396-7770

building@co.coos.or.us

60 E Second St., Coquille, OR 97423

Online permits →

Zoning

Coos County Community Development - Land Use Planning

Zoning compliance letters, zone determinations and land-use applications for unincorporated Coos County

541-396-7770

planning@co.coos.or.us

60 E Second St., Coquille, OR 97423

Online permits →

Septic permits

Coos County Onsite Septic Program

Septic (OSSF) construction permits, site evaluations and inspections for Coos County under a DEQ contract

541-396-7770

onsiteseptic@co.coos.or.us

60 E Second St., Coquille, OR 97423

Online permits →

Roads & driveways

Coos County Road Department

Driveway confirmations and access permits onto county roads

541-396-7660

1281 W. Central, Coquille, OR 97423

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

Off-grid gear

Going off-grid in Coos 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 Coos County, Oregon?

Unincorporated Coos County, Oregon requires a building permit for most new construction, additions, alterations and most repairs1. The Coos County Building Code applies throughout the unincorporated county and incorporates Oregon specialty codes, including residential, structural, mechanical, plumbing and electrical standards2. Coos County issues building permits countywide except structural and mechanical permits inside Coos Bay and North Bend, and Lakeside has its own building department1. A structural application needs a zoning compliance letter, an onsite septic permit when applicable, building plans, the checklist and the completed application1. A permit remains valid for 180 days from issuance or the last inspection on progressing work1. Owner-builders get no permit waiver; Oregon law offers only a narrow exemption from specific structural-code requirements, and a building permit is still issued7. Qualifying agricultural buildings may be exempt from the structural specialty code, but electrical, plumbing and mechanical permits still apply, and Planning must first confirm qualifying farm or forest use13.

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

Coos County Community Development handles building permits, land-use planning, onsite septic and code enforcement from one office at 60 E Second St., Coquille, OR 9742314. Call 541-396-7770, or email the building desk at building@co.coos.or.us14. The county directs applicants to its ePermitting process, accepts applications electronically, in person or by mail, and offers staff help with account setup15. Electrical and plumbing requests also need land-use authorization15. Inside Coos Bay and North Bend, those cities issue structural and mechanical permits, and Lakeside runs its own building department; electrical and plumbing permits elsewhere come from the county1. Septic permits stay with the county Onsite Septic Program regardless of which office issues the building permit16.

Does Coos County have zoning, and what does it mean for RVs, tiny homes and setbacks?

Coos County's zoning and land-development ordinance covers land outside incorporated city boundaries, so zoning inside a city comes from that city3. The Planning Director enforces zoning, land use and structure location in the unincorporated area17. Published districts include Rural Residential RR-2 and RR-5, Controlled Development CD-5 and CD-10, Exclusive Farm Use EFU and Forest F, and overlays can add limits, so confirm the parcel's district on the zone map18. Rural Residential lots generally require 5 acres in RR-5 and 2 acres in RR-2, with exceptions for planned developments and certain older parcels11. Urban Residential buildings have a maximum height of 35 feet19. A manufactured single-family dwelling is allowed through compliance determination review in the residential, Controlled Development and Rural Center zones, which takes at least 30 days, and is not allowed in the commercial, industrial and recreation zones20. Coos County does not publish a general minimum dwelling size in the material we reviewed, and tiny homes are not a defined use; ask Community Development how a proposed unit will be classified.

How do septic permits work in Coos County?

Oregon DEQ regulates septic-system siting, design, installation, operation and maintenance, while Coos County's Onsite Septic Program provides local permitting, inspections and technical support4215. A construction permit is required for new systems and for covered alterations or repairs; an undeveloped site that has never been approved needs a site evaluation16. Properties without municipal sanitation must install an onsite septic system, although city or sanitation-district requirements may govern where service exists22. Only about 0.8% of county soils are rated free of severe limits for a conventional drain field, and difficult groundwater, space, slope or soil conditions can require an alternative system2324. Call Coos County Onsite Septic at 541-396-7770 for permitting or the inspection-only line at 541-266-1098 when work is ready25.

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

Coos County allows limited RV stays, not unrestricted full-time occupancy6. A guest RV on a lot with a dwelling may stay up to 60 days per calendar year, while an owner or immediate family member may camp up to 45 days per year with no more than 2 RVs under that provision6. Oregon also permits occupancy of a camping vehicle on private land only with owner consent, adequate approved water and sewage facilities, and compliance with applicable sanitation and utility standards26. A private campground in a forest zone is a different conditional use: it is for temporary rather than residential stays and limits the same camper to 30 days in a consecutive six-month period27. Urban ADUs cannot be RVs, park models, yurts or similar structures not built for permanent human occupancy9. Coos County's general treatment of tiny homes remains unconfirmed; ask Community Development how the proposed unit and occupancy would be classified.

Building a home in Coos County, Oregon: what are the steps, in order?

  1. Confirm jurisdiction with Coos County Community Development; city limits can change which office issues the permit114.
  2. Verify the zoning district, lot-size standard, overlays and whether the proposed use is allowed before design work begins1711.
  3. Confirm access; new development needs county driveway confirmation before zoning compliance, and state-highway access also needs ODOT approval2829.
  4. If municipal sanitation is unavailable, obtain the county septic site evaluation and construction permit before finalizing the house location2216.
  5. Allow for review time: land-use applications carry a final-action deadline of 120 or 150 days after the application is complete, and a compliance determination costs $330 under the 2026 fee schedule3031.
  6. Submit the zoning compliance letter, septic permit if applicable, plans, checklist and structural application to Community Development1.
  7. Keep permitted work exposed for required inspections and obtain the certificate of occupancy before moving in3233.

What should you check before buying land in Coos County, Oregon?

Water: a landowner drilling a well needs a $550 permit and a $10,000 bond or letter of credit before work starts unless a licensed, bonded well constructor does the work10. Septic: only about 0.8% of county soils are rated free of severe limits for a conventional drain field, so make approval a purchase contingency23. Zoning: verify the parcel's exact district because RR-5 and RR-2 have different minimum lot sizes, and urban ADUs follow different rules from rural ADUs1198. Flood: construction in a mapped special flood hazard area needs an approved floodplain application before work begins12. Access: county standards set sight-distance and grade requirements, so have the Road Department review a steep or blind approach2829. Rental plans: a vacation or short-term rental needs compatibility review, health licensing, compliant access and parking, a recorded deed restriction, and a new compliance determination after ownership changes34. Coos County's effective property-tax rate is about 0.7%, with a median annual bill near $2,2433536.

Watch-outs

  • Coos County has publicly warned that criminals send fake permit and land-use invoices that look like they come from its planning office; confirm any payment request comes from an @co.coos.or.us address and never wire funds or pay by Zelle, Venmo, PayPal or gift card14.
  • Zoning for land inside Coos Bay, North Bend, Coquille, Bandon, Myrtle Point, Powers or Lakeside comes from that city, not the county, and Lakeside has its own building department; structural and mechanical permits inside Coos Bay and North Bend also come from those cities31.
  • Coos County does not publish a general minimum dwelling size in the reviewed material, and its treatment of tiny homes remains unclear; call Community Development at 541-396-7770 before designing or buying one14.
  • An agricultural-building exemption covers only qualifying structural-code work; electrical, plumbing and mechanical permits still apply, and a dwelling does not qualify13.
  • The 2026 Community Development fee schedule took effect July 1, 2026; planning consultation is $175 per hour and fees can add notice or outside-agency costs, so ask for a written estimate31.

Sources

  1. Building a Home in Coos County - A Homeowner's Guide, quoted and re-checked
  2. Article XIII - Community Development Land Use, Buildings, quoted and re-checked
  3. Coos County Zoning and Land Development Ordinances, quoted and re-checked
  4. Housing and Onsite Wastewater Management, quoted and re-checked
  5. Onsite Septic Program - Coos County, quoted and re-checked
  6. co.coos.or.us, quoted and re-checked
  7. Oregon Revised Statutes, ORS 455.320, quoted and re-checked
  8. Coos County Community Development, quoted and re-checked
  9. CCZLDO accessory dwelling unit standards, quoted and re-checked
  10. Landowner Constructed Wells, quoted and re-checked
  11. co.coos.or.us, quoted and re-checked
  12. Coos County Community Development Floodplain Review, quoted and re-checked
  13. Statewide Statutory Interpretation 13-03: Agricultural Exemption, quoted and re-checked
  14. Coos County Community Development (co.coos.or.us)
  15. How to Submit a Permit - Permit Applications, quoted and re-checked
  16. Housing and Onsite Wastewater Management, quoted and re-checked
  17. Coos County Zoning and Land Development Ordinance, quoted and re-checked
  18. Coos County Zoning and Land Development Ordinances, quoted and re-checked
  19. co.coos.or.us, quoted and re-checked
  20. Chapter 4: Balance of County Zones, Overlays & Special Considerations, quoted and re-checked
  21. Onsite Septic Program - Coos County, quoted and re-checked
  22. Building a Home in Coos County - A Homeowner's Guide, quoted and re-checked
  23. 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
  24. Building a Home in Coos County - A Homeowner's Guide, quoted and re-checked
  25. Coos County Onsite Septic Program (co.coos.or.us)
  26. Oregon Revised Statutes, ORS 446.125 Occupancy on private land (Oregon statewide rule), quoted and re-checked
  27. Chapter IV, quoted and re-checked
  28. Chapter 7 Transportation, Access and Parking, quoted and re-checked
  29. Coos County Road Department (co.coos.or.us)
  30. Coos County Zoning and Land Development Ordinances, quoted and re-checked
  31. Coos County Community Development Land Use Fee Schedule, quoted and re-checked
  32. 2023 Oregon Residential Specialty Code - Chapter 1, quoted and re-checked
  33. 2023 Oregon Residential Specialty Code - Chapter 1, quoted and re-checked
  34. Chapter IV Balance of County Zones, Overlays and Special Considerations, quoted and re-checked
  35. Effective property tax rate: Bolthole Index county data
  36. Median property tax bill: 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, Coos County requires a building permit for a home.

RuleCoos CountyCurry CountyJosephine CountyDouglas CountyJackson CountyLane CountyBenton County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Community DevelopmentOR DEQOR DEQCounty On-Site ServicesOR DEQ Onsite Wastewater ProgramCounty Land Management Div.County Community Development

County locator

Coos County in Oregon

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

How Coos County scores

Seclusion80100% ev.
Self-Sufficiency53100% ev.
Admin Boringness35100% ev.
Durability38100% ev.
Property Autonomy72100% ev.
Carry Cost72100% 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 →

$355kTypical home
0.7%Property tax
$4,016Land / acre
67.1"Annual rain
21.3% of yrsSevere drought
0 / yr (+0)Mid-century 100°F days
30 daysMid-century dry spell
2.93" (+6.4%)Mid-century 1-day rain
1.18×Wildfire change factor
100%Forward climate coverage
$1,085Home insurance / yr
2.7% / yrInsurance growth
0.63%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
97,870People within 2 hr
15,685Radius comparison (15 mi)
40.2People / sq mi
36.7%Federal land
15%Land at 15% slope or less
0.8%Soils rated "not limited" for septic (strict USDA rating)
7,789 acWorkable land screen
89.2%Wooded land
101.8 tonsBiomass / forest ac
53°FAvg temp

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Cities and towns in Coos 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: Bandon · Lakeside · Powers

Answers from the rulebook for Coos County

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

Coos County rules

  • Building permitRequired

    Residential building permits administered by Coos County outside incorporated jurisdictions and other areas with separate building departments.

    • Most new construction, additions, alterations, and most repairs require a permit.
    • Coos County issues building permits throughout the county except structural and mechanical permits within the city limits of North Bend or Coos Bay.
    • Electrical and plumbing permitting is administered by Coos County except in Lakeside, which has its own building department and permitting process.
    • Applications require a zoning compliance letter, an onsite septic installation permit if applicable, building plans, checklist, and completed structural application.
    • Permits are valid for 180 days from the issue date or the date of the last inspection on progressive work.

    permit validity: 180 days (from issue date or date of last inspection on progressive work)

    “Most new construction, any addition, alteration of structure and most repairs require a permit.”
  • Building code adoptedAdopted (with conditions)

    The Coos County Building Code and incorporated Oregon specialty codes in unincorporated Coos County and in cities covered by the county's stated jurisdictional exceptions.

    • The building code applies to all unincorporated areas of the county.
    • It also applies within a city's corporate limits when the city has entered into an intergovernmental agreement with the county or does not operate a building-codes program under ORS 455.148 and the agreement or statutory provision so provides.
    • The county administers and enforces the code in areas under county jurisdiction, including cities that do not operate the building-code program.
    • The adopted components include the Oregon Structural, Mechanical, Plumbing, One and Two Family Dwelling, manufactured-dwelling parks and installation, recreational park and organizational camp, and Electrical Specialty Codes, together with the cited Oregon Administrative Rules.
    • For residential structures, the Oregon Residential Specialty Code applies to construction, reconstruction, and repair of one- and two-family dwellings and townhouses; the state page states that the 2023 ORSC administrative provisions were effective and mandatory October 1, 2023, while construction provisions were mandatory April 1, 2024.
    “The building code applies to all unincorporated areas within the county and to all areas within the corporate limits of any city that has entered into an intergovernmental agreement with the county or does not operate building codes program under 455.148 that so provides.”
  • County-wide zoningPresent (with conditions)

    County zoning and land-development regulation for land uses outside the incorporated city boundaries of Coos County, including estuary zoning and other ordinance-regulated land uses.

    • The county page states that Chapter 1 applies to land uses outside the cities' incorporated boundaries.
    • Estuary zoning requires locating the subject site on the zone map and applying the provisions for the applicable aquatic-management or shoreland-management unit.
    • Incorporated cities may have separate local zoning authorities and ordinances.
    “Chapter 1 -Explains how the ordinances and all the elements apply to land uses outside of the cities incorporated boundaries.”
  • Local zoningPresent (with conditions)

    Zoning, land use, structure-location, and land-division regulation under the Coos County Zoning and Land Development Ordinance in areas under county jurisdiction.

    • The Planning Director or authorized representative enforces the ordinance within Coos County under the ordinance's jurisdiction.
    • The county building official or Planning Department may not issue a permit or verification letter for a nonconforming construction, structure, lot, or change of use unless the ordinance otherwise permits it.
    • The cited county ordinance does not establish that it governs incorporated cities that operate their own zoning programs.
    “It shall be the duty of the Planning Director or his/her authorized representative to enforce the provisions of this Ordinance pertaining to zoning, land use, the construction, erection, location or enlargement of any structure and land divisions within Coos County under the jurisdiction of this Ordinance.”
  • Zoning districtsPublished

    Zoning districts and associated zoning regulations outside incorporated city boundaries and outside the Coos Bay and Coquille Estuaries under Coos County jurisdiction.

    • The County zoning page states that Chapter 4 contains zoning districts outside the Coos Bay and Coquille Estuary under county jurisdiction.
    • The zoning page instructs users to locate the property on the zone map and review applicable tables.
    • Published districts include Urban Residential UR-1, UR-2, and UR-M; Rural Residential RR-2 and RR-5; Controlled Development CD-5 and CD-10; Rural Center RC; Commercial C-1; Industrial IND; Airport Operations AO; Recreation REC; South Slough SS; Minor Estuary and Shorelands MES; Forest F; Forest Mixed Use FMU; Exclusive Farm Use EFU; and Bandon Dunes Resort BDR.
    • Primary zones may be further restricted by special development considerations and overlays.
    • Zoning requirements and permitted uses vary by district and applicable overlay.
    “Chapter 4 -This chapter contains all zoning districts outside of the Coos Bay and Coquille Estuary under the county jurisdiction.”
  • Minimum lot sizeDistrict specific (with conditions)

    Residential development in the Coos County Rural Residential RR-5 and RR-2 zoning districts.

    • RR-5 requires 5 acres and RR-2 requires 2 acres.
    • Smaller parcels may be permitted in an approved residential planned unit development if the allowable density of the parent parcel is not exceeded.
    • Certain lawfully created pre-1986 parcels and qualifying land divisions may qualify for exceptions described in the ordinance.
    • Land divisions must be submitted to and approved by Coos County under current standards.

    RR-5 minimum lot/parcel size: 5 acres · RR-2 minimum lot/parcel size: 2 acres

    “(a) Minimum Lot/Parcel Size: i. 5 acres in the RR-5 district ii. 2 acres in the RR-2 district iii. Exception to minimum lot sizes in Rural Residential: 1. Smaller parcels may be permitted in an approved residential planned unit development, provided the allowable density of the parent parcel is not exceeded.”
  • Building heightSpecified

    Development in Coos County Urban Residential zoning districts.

    • Certain architectural and utility features may extend above the prescribed height if no usable floor space is added.

    maximum building height: 35 feet (Spires, towers, domes, steeples, flag poles, antennae, chimneys, solar collectors, smokestacks, ventilators, or similar objects may extend above the limit if no usable floor space is added.)

    “Building Height - Maximum Building height is 35 feet. However, spires, towers, domes, steeples, flag poles, antennae, chimneys, solar collectors, smokestacks, ventilators or other similar objects may be erected above the prescribed height limitations, provided no usable floor.”
  • Living in an RVLimited

    Recreational vehicle dwelling use in Coos County zoning districts, including short-term guest visits on a lot or parcel containing a dwelling and camping on an owner's or immediate family member's property.

    • Short-term guest visits may not exceed 60 days in a calendar year and are permitted without review.
    • Camping is limited to 45 days per calendar year; the camper must own the subject property or be an immediate family member; no more than two RVs may occupy the site for this purpose.
    • The zoning table identifies short-stay RV use as not allowed in UR-1, UR-2, and UR-M, conditionally permitted in RR-2, RR-5, CD, and RC, and not allowed in C-1, IND, AO, REC, SS, and MES.
    • Other zoning, development, septic, and building requirements may apply.

    short-term guest visit maximum: <= 60 days per calendar year · owner/family camping maximum: <= 45 days per calendar year · RV site occupancy for owner/family camping: <= 2 RVs

    “Recreational Vehicles- Recreation Vehicles may be used as a dwelling under the following circumstances: 1. Short-term guest visits on a lot or parcel containing a dwelling. The stay shall not exceed 60 days in a calendar year. This is a permitted use that does not require review. 2. While camping of up to 45 days per calendar year. The camper shall own, or be an immediate family member of, the subject property. No more than two RVs can occupy the site for this limited purpose.”
  • Camping on your landLimited

    Private parks and campgrounds on forest lands under the Coos County zoning ordinance.

    • Campgrounds are for overnight temporary use for vacation, recreational, or emergency purposes, not residential purposes.
    • Except on a lot or parcel contiguous to a lake or reservoir, campgrounds are not allowed within three miles of an urban growth boundary unless an exception is approved under ORS 197.732 and OAR chapter 660, division 4.
    • Campsites may be occupied by a tent, travel trailer, or recreational vehicle.
    • Separate sewer, water, or electric service hookups may not be provided to individual campsites, subject to the stated yurt exception.
    • Overnight temporary use in the same campground may not exceed 30 days during any consecutive six-month period.
    • Private campground approval is a conditional use under the applicable forest-zone standards.

    urban growth boundary separation: >= 3 miles (Exception allowed pursuant to ORS 197.732 and OAR chapter 660, division 4, or for a lot or parcel contiguous to a lake or reservoir) · same-campground temporary occupancy: <= 30 days during any consecutive six-month period

    “Except on a lot or parcel contiguous to a lake or reservoir, campgrounds shall not be allowed within three miles of an urban growth boundary unless an exception is approved pursuant to ORS 197.732 and OAR chapter 660, division 4. [...] Overnight temporary use in the same campground by a camper or camper's vehicle shall not exceed a total of 30 days during any consecutive six-month period.”
  • Manufactured homesLimited

    Manufactured single-family dwellings in Coos County balance-of-county zoning districts outside the Coos Bay and Coquille Estuaries.

    • The zoning table lists Dwelling – Manufactured Single Family (ORS 446.003) as CD in UR-1, UR-2, UR-M, RR-2, RR-5, CD, and RC zones, and N in C-1, IND, AO, REC, SS, and MES zones.
    • CD means compliance determination review, permitted with standards, with clear and objective standards; the process takes a minimum of 30 days.
    • All structures and uses must meet applicable development and siting criteria and special development considerations and overlays for the zoning district.
    • In urban zones, the manufactured dwelling must meet ORS 197.307 requirements.
    • The ordinance defines manufactured homes as structures constructed for movement on public highways, with sleeping, cooking, and plumbing facilities, intended for human occupancy and residential use, and constructed under federal manufactured-housing construction and safety standards.

    minimum CD review time: >= 30 days (The table states the process takes a minimum of 30 days.)

    “Dwelling –Manufactured Single Family (ORS 446.003) CD CD CD CD CD CD CD”
  • Accessory dwellingsLimited

    One accessory dwelling unit on a lot or parcel zoned RR-2 or RR-5 in unincorporated Coos County.

    • The property must not be within an urban reserve area and must be at least two acres.
    • Only one single-family dwelling may be present; the existing dwelling may not be declared a nuisance, facing legal actions, or in foreclosure, and property taxes must be current.
    • The ADU must comply with onsite or approved community sanitation and wastewater regulations, not exceed 900 square feet, and be within 100 feet of the existing single-family dwelling.
    • The ADU must share the main dwelling's water supply if legally allowed, comply with well setbacks, and the property must be served by a fire protection service.
    • Vacation occupancy is prohibited, and the ADU may not be divided from the primary dwelling.
    • Wildfire, defensible-space, wildfire-code, access, and evacuation requirements apply where stated.

    minimum property size: >= 2 acres · maximum ADU floor area: <= 900 square feet · maximum distance from existing single-family dwelling: <= 100 feet

    “One Accessory Dwelling Unit (ADU) is permitted on a lot or parcel zoned for RR-2 or RR-5 provided: 1. The property is not within an urban reserve area. 2. The property size is at least two acres. 3. Only one Single Family Dwelling is present on the property. [...] 6. The Accessory Dwelling Unit does not exceed 900 square feet in floor area. 7. The Accessory Dwelling Unit is located within 100 feet of the existing Single Family Dwelling.”
    One more reviewed finding on this topic
    • Limited — Accessory dwelling units in unincorporated Coos County urban residential and controlled-development areas.
      “The ADU shall be located entirely inside the Urban Growth Boundary or Urban Unincorporated Community Boundary and is zoned for Urban Residential or Controlled Development;”
  • Who permits septicMixed

    Septic permitting, inspections, and technical support for septic systems in Coos County.

    • The county program operates according to state and local regulations.
    “The Onsite Septic Program is a full-service program that provides permitting, inspections, and technical support for the design, installation, and maintenance of septic systems.”
  • Septic permitRequired

    New septic construction and alterations or repairs of existing septic systems in Coos County where an onsite system is applicable.

    • A construction permit covers new construction and alterations and repairs of existing septic systems.
    • A site evaluation is required for an undeveloped site that has never been evaluated for septic approval and may be required for replacement at a different location.
    • An affirmative Land Use Compatibility Statement is required before DEQ issues a construction permit for new construction and alterations.
    • Sites may be unsuitable because of insufficient space, setbacks, sewage-flow capacity, soil conditions, or water-table depth.
    “Yes- Contact the Coos County Onsite to obtain forms and permits 541-396-7770”
  • Septic inspectionLimited

    Inspections performed through the Coos County Onsite Septic Program for septic-system design, installation, and maintenance.

    • The county page confirms that the program provides inspections and gives an inspection contact, but does not state that every septic system receives the same inspection schedule.
    • Inspection requirements may vary by system type and applicable state or local rules.
    “The Onsite Septic Program is a full-service program that provides permitting, inspections, and technical support for the design, installation, and maintenance of septic systems.”
  • Off-grid sanitationLimited

    Onsite/off-grid septic sanitation for properties in Coos County without access to municipal sanitation systems.

    • Onsite septic is required where municipal sanitation is unavailable.
    • A site evaluation and construction permit may be required.
    • An affirmative LUCS is required before DEQ issues a construction permit for new construction and alterations.
    • Not every property is suitable; required space, setbacks, flow capacity, and soil or water-table conditions must be satisfied.
    • Advanced or alternative systems may be required in high groundwater, limited-space, steep-slope, or poor-soil areas.
    “In areas with high groundwater, limited space, steep slopes, or poor soil conditions, more advanced or alternative septic systems may be required. These systems often include components such as sand filters, pressure distribution, or aerobic treatment units to ensure wastewater is properly treated before it reaches groundwater or surface water. There are sites not suitable for an onsite system.”
  • Mandatory utility hookupConditional

    Sanitary wastewater service for development in Coos County.

    • Properties without access to municipal sanitation systems must install an onsite septic system.
    • The source does not establish a universal countywide requirement to connect to municipal water or sewer where service is available.
    • Sanitation districts and incorporated cities may administer their own services or requirements.
    “Properties that do not have access to municipal sanitation systems require that an onsite septic system be installed.”
  • Subdividing landRegulated (with conditions)

    Subdivisions, partitions, planned unit developments, and related land divisions in unincorporated Coos County.

    • Subdivisions and partitions require approval under Chapter VI and applicable state statutes.
    • No person may divide land except after approval under Article 6.2.
    • Applicable zoning, Comprehensive Plan, lot-size, dimensional, parking, landscaping, and road requirements apply.
    • A subdivision is generally division into four or more lots within a calendar year; a partition is two or three parcels within a calendar year.
    • Tentative plans, technical review, required improvements, final plats, and recording may be required.

    subdivision threshold: >= 4 lots within a calendar year · partition threshold: 2-3 parcels within a calendar year

    “No person shall divide land, except after approval of such division pursuant to this Article.”
  • Driveway accessRequired

    New development and new driveway or access connections intersecting County Roads in areas under Coos County jurisdiction.

    • All new development must have a completed driveway confirmation before obtaining a zoning compliance letter.
    • New driveway and access connections to County Roads must satisfy spacing, sight-distance, safety, and design standards.
    • Access involving the State Transportation System must be reviewed by ODOT before the County accepts the application, and ODOT-required measures become approval conditions.
    • Single-family driveway access must comply with Figure 7.1.425.
    • Sight distance is 100 feet in both directions where speed is less than 35 mph and 150 feet in both directions where speed is greater than 35 mph.
    • A driveway over 1,000 feet requires a pullout every 600 feet.
    • A driveway unable to meet the maximum 18% grade may use a recorded legal agreement, deed reference, warning sign, and proof filed with the Planning and Road Departments.
    • Forestry, mining, and agricultural access has a stated exception from the minimum road, bridge, and driveway standards, but must meet the access standards listed in the section.

    minimum sight distance below 35 mph: 100 feet each direction · minimum sight distance above 35 mph: 150 feet each direction · pullout interval for driveway over 1,000 feet: per 600 feet (driveway must exceed 1,000 feet) · maximum driveway grade: 18 percent (recorded legal agreement procedure may apply if not met)

    “All new development is required to have a driveway confirmation completed.”
  • Building in a floodplainRequired

    Construction or regulated development, including structures, manufactured homes, fill, and other activities, within an area of special flood hazard established in Coos County Zoning and Land Development Ordinance Section 4.11.232, outside incorporated city boundaries.

    • A floodplain application must be submitted and approved before construction or regulated development begins.
    • The requirement applies to all structures, including manufactured homes, and all development including fill and other activities as defined in the ordinance.
    • Applications must use Planning Department forms and may require scaled plans showing the nature, location, dimensions, elevations, structures, fill, storage, and drainage facilities.
    • Required supporting information includes applicable elevations, floodproofing information, professional certification for nonresidential floodproofing, watercourse alteration information, plot plans, site-elevation certification, flood hazard area and floodway identification, the 100-year flood elevation, and any other information needed to show compliance.
    • Variance, watercourse-change, or staff-determination applications receive conditional-use-style notice and appeal opportunity; nondiscretionary compliance determinations are processed as Compliance Determinations under Article 5.10.
    • The Coos County Planning Director or designated staff administers the ordinance and grants or denies development permit applications.
    • Other development authorization requires licensed-engineer certification that the activity will not increase flood levels in a designated floodway or cause a cumulative increase of more than one foot outside a designated floodway.

    maximum cumulative increase outside a designated floodway: <= 1 foot (during occurrence of the base flood discharge; based on licensed engineer certification) · flood hazard probability for area of special flood hazard: >= 1 percent annual chance (as described for mapped A or V areas)

    “A floodplain application shall be submitted and approved before construction or regulated development begins within any area of special flood hazard established in Section 4.11.232. The permit shall be for all structures including manufactured homes, as set forth in the “DEFINITIONS,” and for all development including fill and other activities, also as set forth in the “DEFINITIONS.””
  • Short-term rentalsLimited

    Vacation rentals and short-term rentals regulated as a county zoning use in unincorporated Coos County.

    • The use must be found compatible with the surrounding area.
    • The use must be licensed by Coos Health & Wellness under ORS 446.310-350.
    • The use must meet Chapter VII parking access, driveway, and parking standards.
    • A transfer to a subsequent landowner requires the new property owner to submit a Compliance Determination Application showing compliance.
    • A deed restriction must be recorded with the Coos County Clerk acknowledging the rental as accessory to the approved residential use.
    • If located within an Urban Growth Boundary, further restrictions may be required based on City comments.
    “VACATION RENTAL/SHORT TERM RENTAL - Subject to the following criteria:”
  • Permit feesPublished (with conditions)

    Coos County Community Development land-use and development applications, including planning and floodplain reviews.

    • The schedule is expressly effective July 1, 2026.
    • Fees vary by application type and may include additional actual-cost charges, notice costs, or outside-agency costs.
    • The schedule states that the applicant is responsible for actual cost of review where applicable.

    land use fee schedule effective date: 2026-07-01 · compliance determination fee: 330 USD · floodplain review without notice of decision: 546 USD · floodplain review requiring notice of decision: 955 USD · floodplain review with conditional use: 524 USD · planning consultation fee: per 175 USD/hour

    “COOS COUNTY COMMUNITY DEVELOPMENT LAND USE FEE SCHEDULE EFFECTIVE: 7/1/26”
  • Permit processPublished (with conditions)

    County land-use and development permit procedures for land uses outside incorporated city boundaries.

    • Chapter 5 contains the county's land-use application administrative processes and review procedures.
    • Applications must use County-prescribed forms, provide sufficient information and evidence to demonstrate compliance with applicable ordinance criteria and standards, and include the appropriate fee.
    • An application is not considered filed until all application fees have been paid.
    • For land within an urban growth boundary, and separately for all applications for mineral or aggregate extraction, final action is stated as due within 120 days after the application is deemed complete; all other applications are stated as due within 150 days.
    • The 120-day and 150-day periods may be extended upon written request by the applicant.

    final-action period for land within an urban growth boundary: 120 days (after the application is deemed complete) · final-action period for mineral or aggregate extraction applications: 120 days (after the application is deemed complete) · final-action period for all other applications: 150 days (after the application is deemed complete)

    “Applications for development or land use action shall be filed on forms prescribed by the County and shall include sufficient information and evidence necessary to demonstrate compliance with the applicable criteria and standards of this Ordinance and be accompanied by the appropriate fee. An application shall not be considered to have been filed until all application fees have been paid.”
    One more reviewed finding on this topic
    • Published (with conditions) — Submitting Coos County permit applications for development in areas under County jurisdiction.
      “Electronic fillable forms available online and may be submitted electronically, in person at 60 E. 2nd St. Coquille OR 97423, or by mail at 250 N. Baxter, Coquille OR 97423. Please make sure to provide your land use authorization and required documents for all permit request including electrical and plumbing.”

Oregon rules that apply here

  • Owner-builder exemptionConditional

    An owner-built single-family residence and adjacent auxiliary structures in Coos County, subject to Oregon law.

    • The owner must be the owner of title or contract purchaser of record and must not have used the subsection (2) exemption during the five years before applying.
    • The dwelling and outbuildings must have structural components constructed entirely by the owner who intends to occupy the structures, or by the owner and unpaid assisting friends and relatives.
    • The exemption is limited 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.
    • A building permit must be issued and must note whether the owner-built dwelling or outbuilding complies with the exempted requirements.
    • If the dwelling or 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 recording and provide a legally sufficient property description.
    • The exemption is not a general building-permit waiver; Coos County states that most new construction, additions, structural alterations, and most repairs require a permit.
    • ORS 455.330 through 455.350 provide a separate rural-area structural-code exemption that requires county enactment by ordinance; no Coos County ordinance adopting that separate rural-area exemption was established in this research.
    “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
    • 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”
  • InspectionsRequired

    Construction or work requiring a permit under the Oregon Residential Specialty Code, including work in Coos County.

    • Permit-exempt work is excluded from this inspection requirement.
    • Construction must remain accessible and exposed until approved.
    • The permit applicant must keep the work accessible and exposed for inspection and bears expenses associated with removal or replacement of material needed to allow inspection.
    • Foundation, slab or under-floor, mechanical and gas, framing and masonry, and final inspections apply at the stages specified by the code.
    • Work may not proceed beyond each successive inspection point without building-official approval.
    • In Coos County, county inspection coverage has municipal exceptions: Lakeside for plumbing and electrical, and Lakeside, Coos Bay, and North Bend for structural inspection.
    “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 occupancyRequired

    Use or occupancy of buildings and structures, including new residential dwellings and townhouses, and changes in character, use, or occupancy in Coos County.

    • A certificate of occupancy is required before occupancy or a change in character, use, or occupancy.
    • Certificates are not required for work exempt from permits under Section R105.2 or for accessory buildings or structures.
    • A temporary certificate may be issued before completion if the portion to be occupied can be occupied safely; the building official sets its validity period.
    • Before issuance for a new residential dwelling or townhouse, the general contractor or owner issued the structural permit must provide contact and relevant license information for contractors who performed electrical, HVAC, and plumbing work.
    • A certificate or temporary certificate may be revoked in writing for an applicable-law violation posing a health or safety threat, or when issued in error or based on incorrect information.
    “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.”
  • Well permitRequired

    A property owner constructing, altering, converting, or abandoning a water-supply well in Oregon without being a licensed and bonded Water Supply Well Constructor.

    • A licensed and bonded Water Supply Well Constructor is exempt from the landowner-permit requirement stated on the page.
    • The permit, permit fee, and bond or irrevocable letter of credit must be obtained before work begins.
    • The application requires owner and surety information, proposed well location, proposed use, type of work, and a Department-approved well design plan.
    • The bond or irrevocable letter of credit is $10,000 and the permit fee is $550.
    • Only the owner of record, an immediate family member of the owner of record, or a full-time employee 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 after permit expiration or well completion, whichever occurs first.
    • The Department may deny a permit if the proposed work presents a health threat, health hazard, contamination source, or groundwater waste source.

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

    “The Water Resources Commission requires a permit [...] for each water supply well constructed, altered, converted, or abandoned by a landowner”
    One more reviewed finding on this topic
    • Required — Each water-supply well constructed, altered, converted, or abandoned by a landowner in Oregon, including Coos County.
      “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.”
  • Agricultural exemptionAvailable (with conditions)

    Qualifying agricultural buildings on legally designated farm or forest-use land in Oregon, including unincorporated Coos County where local planning and zoning requirements are satisfied.

    • The exemption is only from the Oregon Structural Specialty Code.
    • Electrical, plumbing, and mechanical work remains subject to permits and the respective specialty codes.
    • The local planning department, not the building official, determines whether the property is a qualifying farm or forest use under adopted zoning ordinances.
    • An agricultural building must be used for qualifying agricultural, forestry, horticultural, animal husbandry, crop, livestock, dairy, or related storage and processing purposes.
    • A dwelling, structure with 10 or more persons present at one time when used for a purpose other than growing plants, a State Fire Marshal-regulated structure, a structure used by the public, and certain National Flood Insurance Act structures are excluded.
    • Forest-operation agricultural buildings may not be converted to another use.

    statutory authority: ORS 455.315

    “The exemption is only from the Oregon Structural Specialty Code. Any electrical, plumbing or mechanical work is subject to permit”
    One more reviewed finding on this topic
    • Available (with conditions) — Qualifying agricultural buildings, agricultural grading, equine facilities and dog-training facilities under Oregon structural-code law.
      “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.”
  • 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 — Tiny-home occupancy, including a tiny home on a permanent foundation, a park model, or a tiny home on wheels, in unincorporated Coos 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 Coos County

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

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

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 Coos County, Oregon

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

Coos County scores 62/100 on the Bolthole Index, a solid county profile. Its strengths: sparse surroundings — about 15,685 people within 15 miles and a stronger property-autonomy legal backdrop. Watch-outs: more administrative friction around building and land use and elevated current hazard exposure.

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

Coos County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Coos County Community Development, Onsite Septic Program (contract/agent program under Oregon DEQ rules). 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 Coos County?

Living in an RV on your own land in Coos County is limited to specific cases: Recreational vehicle dwelling use in Coos County zoning districts, including short-term guest visits on a lot or parcel containing a dwelling and camping on an owner's or immediate family member's property. Short-term guest visits may not exceed 60 days in a calendar year and are permitted without review. Camping is limited to 45 days per calendar year; the camper must own the subject property or be an immediate family member; no more than two RVs may occupy the site for this purpose. Confirm with the county before relying on it.

How much does land cost in Coos County, Oregon?

Land in Coos County runs about $4,016 per acre, based on the latest county data.

What is the water situation in Coos County?

Coos County gets about 67.1" of rain a year, with severe drought in roughly 21.3% of years. On water rights, Coos County lies in the South Coast Restrictively Classified Area — Classified 1980 over sand-dune/bedrock aquifers (18 sq mi); most exempt uses allowed, non-exempt appropriations restricted..

How remote is Coos County?

A typical private-land location has about 15,685 people within 15 miles and 668,987 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Coos compares in Oregon

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