Coos County, OR Building Permits, Zoning & Septic Rules

Unincorporated Coos County, Oregon requires a building permit for most new construction, additions and repairs, issued by Coos County Community Development¹. The county also enforces zoning outside its incorporated cities, so what you can build and where depends on the parcel's zoning district². Septic systems go through the county's own Onsite Septic Program, working under Oregon DEQ's rules rather than DEQ directly³. The coastal soils here rate poorly for a conventional drain field, so budget for a site evaluation and likely an engineered system⁴.

At a glance

Building permit: Required outside city limits, through Coos County Community Development¹
Zoning: Yes, a countywide zoning ordinance applies outside the county's incorporated cities²
Septic: County-run Onsite Septic Program permits and inspects under state DEQ rules³
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 RVs⁵
Owner-builder: No exemption from the permit itself; Oregon exempts qualifying owner-built homes only from certain structural details like ceiling height and room size⁶
Accessory dwelling unit: Up to 900 sq ft allowed on RR-2/RR-5 lots of at least 2 acres, within 100 feet of the main home⁷
Wells: Landowner well permit required ($550 fee, $10,000 bond) unless a licensed well constructor does the work⁸
Minimum lot size on resource lands: 80 acres for exclusive farm use or forestland, 160 acres for EFU rangeland⁹

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

[email protected]

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

[email protected]

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

[email protected]

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 September 25, 2026.

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

Unincorporated Coos County, Oregon requires a permit for most new construction, additions, alterations and most repairs¹⁰. Coos County Community Development issues building permits countywide, with two carve-outs: structural and mechanical permits inside the city limits of Coos Bay and North Bend go through those cities instead, and the city of Lakeside runs its own separate building and planning department entirely¹⁰. Electrical and plumbing permitting everywhere else in the county, outside Lakeside, is administered by the county¹⁰. A structural permit application needs a zoning compliance letter, an onsite septic permit if the lot needs one, complete building plans, a checklist and the structural application itself¹⁰. The permit stays valid for 180 days from issue, or from the date of the last inspection on a job that is still progressing¹⁰. Oregon's statewide Residential Specialty Code sets the construction standards the county enforces¹¹.

Who is the Coos County building department, and how do you reach them?

Coos County Community Development handles building permits, land-use planning, onsite septic and code enforcement out of one office at 60 E Second St., Coquille, OR 97423¹². Call the main line at 541-396-7770, or reach the building desk directly by email at [email protected]¹². Applications can go in through the state's Oregon ePermitting citizen access portal, by email, or in person; walk-in customers should call ahead for hours¹². If your land sits inside Coos Bay, North Bend, Coquille, Bandon, Myrtle Point, Powers or Lakeside, that city's own planning or building department handles some or all of the permit instead of the county¹⁰. The county has also warned that criminals have been sending fake permit and land-use invoices that appear to come from its planning office; before paying anything, confirm the email came from an @co.coos.or.us address, and never wire funds or pay by Zelle, Venmo, PayPal or gift card¹².

Does Coos County have zoning? (and what that means for RVs, tiny homes and setbacks)

Yes: Coos County's zoning and land-development ordinance covers all land outside the incorporated boundaries of its cities¹³. The county's Planning Director enforces zoning, land use and where structures may sit within that unincorporated jurisdiction¹⁴. Zoning districts published on the county's map include Urban Residential, Rural Residential (RR-2 and RR-5), Controlled Development, Rural Center, Exclusive Farm Use, Forest, Forest Mixed Use and the Bandon Dunes Resort district, plus separate estuary zoning along the Coos Bay and Coquille estuaries¹⁵. Which uses are allowed on a given parcel, including an RV, a tiny home or an accessory dwelling, depends on which district that parcel sits in, so confirm the zone on the county's map before you buy¹⁵. Coos County's own material does not spell out a general minimum dwelling size or how it classifies a tiny home; ask Community Development to confirm before you plan one. Cities inside the county, including Lakeside, run their own separate zoning for land inside their limits¹⁰.

How do septic permits work in Coos County?

Coos County's own Onsite Septic Program permits, inspects and gives technical support for septic systems under Oregon DEQ's rules, rather than DEQ handling it directly¹⁶. Oregon DEQ contracts county septic permitting out to local jurisdictions in most of the state's counties, and Coos County is one of them¹⁷. A construction permit is required for new septic systems and for most alterations or repairs¹⁸. An undeveloped site that has never been evaluated needs a site evaluation, and DEQ requires an affirmative Land Use Compatibility Statement before it issues the construction permit¹⁸. Coos County's soils make this more than a formality: USDA survey data rates only about 0.8% of the county's soils as free of severe limits for a conventional drain field, so plan on a site evaluation and a real chance you'll need a sand filter, pressure distribution or other alternative system rather than a standard trench⁴¹⁹. Call the county's Onsite Septic desk at 541-396-7770 for permitting, or the inspection-only line at 541-266-1098 once a system is going in²⁰.

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

Not as a full-time residence outright: Coos County's zoning ordinance allows an RV as a dwelling only in two narrow situations⁵. A short-term guest visit on a lot that already has a dwelling cannot exceed 60 days in a calendar year and needs no review⁵. Camping in an RV for up to 45 days a year is allowed if the camper owns the property or is an immediate family member of the owner, and no more than 2 RVs may occupy the site under this rule⁵. Whether short-stay RV use is even conditionally allowed depends on the zone: the county's table permits it, with review, in Rural Residential, Controlled Development and Rural Center zones, but not in Urban Residential, Commercial, Industrial or several resource and estuary zones⁵. Oregon law lets a county opt to allow one long-term RV as a tenant's residence on a rural lot that also has an owner-occupied primary home, but Coos County's own pages do not confirm it has adopted that option here, so ask Community Development before counting on it²¹. Coos County's official material does not establish a countywide tiny-home occupancy rule either; confirm with Community Development how a specific tiny home would be classified before you buy.

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

Confirm which jurisdiction covers your parcel. Outside Coos Bay, North Bend, Coquille, Bandon, Myrtle Point, Powers and Lakeside, Coos County Community Development is your building and planning office; inside one of those cities, that city's own department applies instead¹².
Get a zoning compliance letter and check the parcel's zoning district and any estuary or overlay restrictions before you design anything¹⁵.
Confirm access. New development needs a completed driveway confirmation from the county Road Department before it can get a zoning compliance letter, and any new access onto a state highway needs ODOT sign-off as well²²²³.
Line up septic. If the lot has no municipal sewer, contact the county's Onsite Septic desk for a site evaluation and construction permit before you finalize plans¹⁸²⁰.
Submit the structural permit application with the zoning compliance letter, septic permit if needed, building plans, checklist and application fee to Community Development, who will invoice review fees and email you when your plans are approved¹⁰¹².
Schedule inspections at each required stage, keep the work exposed for inspection, and get your certificate of occupancy before you move in²⁴²⁵.

What to check before you buy land in Coos County

Water: if you'll drill a well, Oregon requires the landowner to get a $550 well-construction permit backed by a $10,000 bond or letter of credit before work starts, unless a licensed and bonded well constructor does the drilling⁸. Septic and soils: with only about 0.8% of Coos County's soils rated free of severe limits for a conventional drain field, budget for a site evaluation and a real chance you'll need an engineered system rather than a standard trench⁴. Flood and estuary overlays: Coos County's land-use fee schedule prices a floodplain review starting at $546 without a notice of decision, or $955 when one is required, so ask Community Development whether your parcel carries a floodplain or estuary overlay before you close²⁶¹². Access: county road standards require 100 feet of sight distance below 35 mph, 150 feet above it, and cap driveway grade at 18%, so a steep or blind approach can add cost or need a variance²². Land division: creating 4 or more new lots in a calendar year makes it a subdivision under county ordinance, while a smaller split is a partition; either way, plats need county approval before the lots can be sold²⁷. Taxes: Coos County's effective property tax rate runs about 0.7%, with a typical annual bill near $2,243²⁸²⁹.

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 card¹².
Zoning and building rules for land inside Coos Bay, North Bend, Coquille, Bandon, Myrtle Point, Powers or Lakeside run through that city, not the county; Lakeside in particular has its own separate building and planning department for everything, including electrical and plumbing that the county handles elsewhere¹⁰.
Coos County's own pages do not confirm a general minimum dwelling size, a general agricultural exemption, or how a tiny home would be classified; call Community Development at 541-396-7770 before you plan around any of these¹².

Sources

Written September 25, 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.

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%Septic soil without severe limits

7,789 acWorkable land screen

89.2%Wooded land

101.8 tonsBiomass / forest ac

53°FAvg temp

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 a Home in Coos County - A Homeowner's Guide ↗Re-checked Sep 24, 2026
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.”
Article XIII - Community Development Land Use, Buildings ↗Re-checked Sep 24, 2026
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.”
Coos County Zoning and Land Development Ordinances ↗Re-checked Sep 24, 2026
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.”
Coos County Zoning and Land Development Ordinance ↗Re-checked Sep 24, 2026
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.”
Coos County Zoning and Land Development Ordinances ↗Re-checked Sep 24, 2026
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.”
Chapter IV ↗Re-checked Sep 24, 2026
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.”
Chapter IV ↗Re-checked Sep 24, 2026
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.”
Coos County Community Development ↗Re-checked Sep 24, 2026
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.”
Onsite Septic Program - Coos County ↗Re-checked Sep 24, 2026
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”
Housing and Onsite Wastewater Management ↗Re-checked Sep 24, 2026
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.”
Onsite Septic Program - Coos County ↗Re-checked Sep 24, 2026
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.”
Building a Home in Coos County - A Homeowner's Guide ↗Re-checked Sep 24, 2026
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.”
Building a Home in Coos County - A Homeowner's Guide ↗Re-checked Sep 24, 2026
Subdividing landRegulated (with conditions)
Subdivisions, partitions, planned unit developments, and streets or private roads created for land division in unincorporated Coos County.
- The ordinance applies to all land within unincorporated territory of the County.
- Preliminary plans and final documents must be submitted for approval under the ordinance and state statutes.
- No person may divide land except after approval under Chapter VI.
- A subdivision or partition plat must be acknowledged and recorded before lots or parcels may be sold or conveyed, and a tentative plan must be approved before negotiating to sell a subdivision lot.
- Land divisions must conform to applicable Chapters 3, 4, and 7 requirements, including uses, lot size and dimensions, parking, landscaping, and other standards.
subdivision threshold: >= 4 lots within a calendar year (a partition is two or three parcels within a calendar year)
“No person shall divide land, except after approval of such division pursuant to this Article.”
Chapter VI Lots and Parcels ↗Re-checked Sep 24, 2026
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.”
Chapter 7 Transportation, Access and Parking ↗Re-checked Sep 24, 2026
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:”
Chapter IV Balance of County Zones, Overlays and Special Considerations ↗Re-checked Sep 24, 2026
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”
Coos County Community Development Land Use Fee Schedule ↗Re-checked Sep 24, 2026

Oregon rules that apply here

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”
2023 Oregon Residential Specialty Code - ORS 455.320 reprinted ↗Re-checked Sep 12, 2026
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.”
2023 Oregon Residential Specialty Code - Chapter 1 ↗Re-checked Sep 24, 2026
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.”
2023 Oregon Residential Specialty Code - Chapter 1 ↗Re-checked Sep 24, 2026
Minimum lot sizeSpecified
Lots or parcels in Oregon resource-land zones covered by ORS 215.780: exclusive farm use land and designated forestland.
- The stated standards apply except as provided in ORS 215.780(2).
- A county may adopt a lower minimum lot or parcel size in specified circumstances if it demonstrates compliance to the Land Conservation and Development Commission or satisfies one of the statutory exceptions.
- The statute states that a county with an acknowledged smaller minimum lot or parcel size described in ORS 215.780(5) need not comply with subsection (2).
minimum lot or parcel size for exclusive farm use land not designated rangeland: >= 80 acres (Subject to ORS 215.780(2) and (5).) · minimum lot or parcel size for exclusive farm use land designated rangeland: >= 160 acres (Subject to ORS 215.780(2) and (5).) · minimum lot or parcel size for designated forestland: >= 80 acres (Subject to ORS 215.780(2) and (5).)
“Except as provided in subsection (2) of this section, the following minimum lot or parcel sizes apply to all counties: (a) For land zoned for exclusive farm use and not designated rangeland, at least 80 acres; (b) For land zoned for exclusive farm use and designated rangeland, at least 160 acres; and (c) For land designated forestland, at least 80 acres.”
Oregon Revised Statutes, Chapter 215 ↗Re-checked Sep 12, 2026
Manufactured homesAllowed (with conditions)
Occupancy of a manufactured dwelling on private land in Oregon with the landowner's consent.
- The lot, tract, or parcel must have adequate area for safe, approved water supply and sewage disposal facilities.
- The occupancy must not conflict with ORS 446.310(9).
- The person must comply with all applicable state or local sanitation, water, plumbing, electrical, and sewerage-installation standards.
“A person may occupy a manufactured dwelling or a camping vehicle on private land with the consent of the owner”
Oregon Revised Statutes, ORS 446.125 ↗Re-checked Sep 12, 2026
Well permitRequired
Each water-supply well constructed, altered, converted, or abandoned by a landowner in Oregon, including Coos County.
- The landowner permit is not required when the landowner is a licensed and bonded Water Supply Well Constructor.
- The permit, permit fee, and bond or irrevocable letter of credit must be obtained before work begins.
- The bond or irrevocable letter of credit is $10,000.
- The permit fee is $550.
- The permit expires six months after issuance.
- A water-well report is due within 30 days after permit expiration or completion, whichever occurs first.
- The Department may deny a permit for a health threat, health hazard, contamination source, or groundwater waste.
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 completion of the well, 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.”
Landowner Constructed Wells ↗Re-checked Sep 24, 2026
Agricultural exemptionAvailable (with conditions)
Qualifying agricultural buildings, agricultural grading, equine facilities and dog-training facilities under Oregon structural-code law.
- The exemption is only from the Oregon Structural Specialty Code.
- Electrical, plumbing and mechanical work remains subject to permits and the applicable specialty codes.
- An agricultural building must be located on a farm or forest operation and used for the statutory agricultural, forestry, horticultural, animal-husbandry or related purposes.
- An agricultural building does not include a dwelling; a structure used for a purpose other than growing plants in which 10 or more persons are present at any one time; a structure regulated by the State Fire Marshal; a structure used by the public; or a structure subject to the National Flood Insurance Act provisions identified in ORS 455.315.
- Incorporated cities may regulate agricultural buildings, equine facilities and dog-training facilities within their boundaries.
- Additional uses in an agricultural building must be incidental and accessory, personal to the farm owner and immediate family or household, and pose no greater hazard than the listed agricultural uses.
maximum persons present for qualifying non-growing-plants agricultural structure: < 10 persons (Structures with 10 or more persons present at one time are excluded.)
“The provisions of this chapter do not authorize the application of a state structural specialty code to any agricultural building, agricultural grading, equine facility or dog training facility.”
Oregon Revised Statutes, Chapter 455 ↗Re-checked Sep 12, 2026
Permit processPublished (with conditions)
Online homeowner building-permit applications through Oregon ePermitting in participating cities and counties.
- Participation by cities or counties is voluntary.
- Each participating city or county determines which permits are available for online sale.
- The applicant creates an account, downloads the homeowner acknowledgement form, searches for the work-site address, enters owner contact details, uploads the form, and enters work details.
- After submission, the local city or county contacts the applicant when fees are ready to be paid and when the permit has been issued.
- Applicants may track status, pay fees, upload documents, schedule inspections, and review inspection results after submission.
“Participation by cities or counties is voluntary and each participating city or county determines which permits are available for sale online.”
Online building permit application process for homeowners ↗Re-checked Sep 12, 2026
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.”
Oregon Revised Statutes, Chapter 215 — County Planning; Zoning; Housing Codes ↗Re-checked Sep 21, 2026
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.”
Oregon Revised Statutes, Chapter 455 — Building Code ↗Re-checked Sep 21, 2026

Still unanswered

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

Minimum dwelling size — Minimum floor area for dwellings in unincorporated Coos County.
Tiny homes — Occupancy of tiny homes 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 ↗

South Coast Restrictively Classified Arealocalized of county
Classified 1980 over sand-dune/bedrock aquifers (18 sq mi); most exempt uses allowed, non-exempt appropriations restricted.
Oregon Water Resources Department — Groundwater Administrative Areas ↗

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.

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

At a glance

Who to call

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

Who is the Coos County building department, and how do you reach them?

Does Coos County have zoning? (and what that means for RVs, tiny homes and setbacks)

How do septic permits work in Coos County?

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

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

What to check before you buy land in Coos County

Watch-outs

Sources

Coos County in Oregon

How Coos County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Coos County

Coos County rules

Oregon rules that apply here

Still unanswered

Water rights & wells in Coos County

Living off-grid in Coos County, Oregon

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

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

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

How much does land cost in Coos County, Oregon?

What is the water situation in Coos County?

How remote is Coos County?

How Coos compares in Oregon