Unincorporated Garfield County, Washington requires a building permit for a new home, and county zoning also applies12. Garfield County Public Works is the first stop for building and planning, while the Garfield County Health District handles septic review34. Confirm the parcel's zoning, wastewater plan and road access before committing to a house site.
At a glance
- Building permit
- Required for a new dwelling outside city limits13
- Zoning
- County zoning applies; confirm the parcel's district and allowed use with Public Works2
- Septic
- Permitted through the Garfield County Health District before covered construction begins45
- Owner-builder
- Exempt from contractor registration when statutory conditions are met, but not from permits6
- Tiny home
- Must meet the state building code and local siting and permit requirements7
- RV living
- Private-land occupancy rules could not be confirmed; ask Public Works before relying on an RV as housing3
- County-road driveway
- County permission is required before constructing an approach to a county road8
Who to call
Building permits
Building-permit applications for Garfield County outside city limits
19th and Arlington, Pomeroy, WA
Septic permits
Garfield County Health District
Health review associated with building applications and local septic administration
121 South 10th Street, Pomeroy, WA
Floodplain permits
County floodplain questions
300 S 19th Street, PO Box 160, Pomeroy, WA 99347
Contact details are copied from each office’s official page and were checked against it on September 28, 2026.
Do you need a building permit in Garfield County, Washington?
Yes. A new dwelling in unincorporated Garfield County requires a county building permit, plan review and inspections1. The county's own permit FAQ says owners or authorized agents doing covered construction outside city limits must complete a building permit3. Washington's building code applies in every county and city, with local enforcement9. Do not assume a small project is automatically exempt: Washington merely allows local governments to adopt a limited valuation-based exemption, and the available information does not establish that Garfield County adopted it10. Ask Public Works which applications and trade permits your exact scope needs before ordering materials.
Who is the Garfield County building department, and how do you reach it?
Garfield County routes building and planning work through Public Works at 19th and Arlington in Pomeroy; the listed phone is (509) 843-13013. The county makes its building-permit process information and application available online3. Application review is project-specific, so describe the parcel, proposed use, structure and utilities when you call. For floodplain questions on land outside Pomeroy, the county directs callers to Public Works at the same phone number and lists its mailing address as 300 S 19th Street, PO Box 160, Pomeroy, WA 9934711.
Does Garfield County have zoning?
Garfield County administers a zoning ordinance, and its Planning Division reviews proposals for zoning, critical areas, environmental review, shoreline compliance and related development issues2. That means a buildable-looking rural tract still needs a parcel-specific answer on allowed uses, setbacks, lot size, height and access. Current countywide numbers for those standards could not be confirmed, so ask Garfield County Public Works for the parcel's zoning designation and the controlling ordinance text before designing3. Washington also regulates subdivisions and short subdivisions, and approval must conform to applicable zoning or other land-use controls12. A floodplain site adds a local development-permit step through the county government1311.
How do septic permits work in Garfield County?
Garfield County's local health jurisdiction administers on-site sewage permits, and county information identifies the Garfield County Health District at 121 South 10th Street in Pomeroy, phone (509) 843-3412414. Except for a minor repair, Washington requires an application and local-health permit before installing, repairing, modifying, connecting to or expanding an on-site sewage system5. The state application process calls for site and soil evaluation, a site plan, the water source and a detailed system design5. Only about 15% of county soils are rated without severe limitations for a conventional drain field, so make septic feasibility an early contingency rather than a post-purchase task15.
Can you live in an RV or tiny home on land in Garfield County?
Garfield County's rule for living in an RV on private land could not be confirmed; call Public Works with the parcel number and ask about both temporary occupancy and occupancy during construction3. The state definition describing an RV as temporary, transient quarters that are not a primary residence does not itself grant private-land siting permission16. A Washington tiny house may be built on wheels and may be no larger than 400 square feet, but it must meet the Washington State Building Code and remains subject to local foundation, installation, location and permit requirements7. Garfield County zoning applies, so a tiny home's legality depends on the parcel and proposed placement as well as the structure itself2.
Building a home in Garfield County: the steps, in order
- Call Garfield County Public Works at (509) 843-1301 with the parcel number, proposed use and site concept; confirm zoning, setbacks, critical areas, floodplain status and required applications32.
- Arrange septic site and design review with the Garfield County Health District before construction begins145.
- Obtain county permission before building an approach to a county road, or written state permission for an approach on a state-highway right-of-way817.
- Submit the county building-permit application and plans; a valid complete application is considered under the building and land-use rules in effect on its application date18.
- Schedule the required inspections with the county and obtain final acceptance before occupancy; the exact inspection stages and certificate process should be confirmed with Public Works13.
What should you check before buying land in Garfield County?
Start with zoning and legal access: Garfield County has zoning, while a new county-road approach needs county permission and must meet county drainage and construction rules28. Check septic feasibility next because only about 15% of county soils avoid a severe conventional-drain-field limitation15. Review flood mapping with Public Works before placing improvements; development in a Washington floodplain requires a local floodplain development permit1311. The county averages about 19.8 inches of precipitation annually, and only about 26.7% of its land is at a slope of 15% or less, so verify the actual parcel's water source, terrain and buildable area rather than relying on county averages1920. The median property-tax bill is about $1,306 a year, with an effective rate near 0.6%2122.
Watch-outs
- Garfield County's current numeric setbacks, minimum lot sizes and local dwelling-size rules could not be confirmed; obtain the parcel's zoning designation and current ordinance from Public Works before designing3.
- An owner-builder exemption concerns Washington contractor registration only; county building, septic and other permit requirements still apply6.
- Electrical, plumbing and mechanical work are not covered by Washington's optional small-project building-permit exemption10.
Sources
- Garfield County Building Department (2026 county census)
- Garfield County Zoning Ordinance (2026 county census)
- Garfield County Public Works (garfieldcountywa.gov)
- Garfield County Public Health - Septic (2026 county census)
- WAC 246-272A-0200 Permit requirements (Washington statewide rule), quoted and re-checked
- RCW 18.27.090 — Exemptions, quoted and re-checked
- Tiny Houses (Washington statewide rule), quoted and re-checked
- RCW 36.75.130 — Approaches to county roads—Rules regarding construction—Penalty (Washington statewide rule), quoted and re-checked
- RCW 19.27.031 — State building code—Adoption—Conflicts—Opinions (Washington statewide rule), quoted and re-checked
- WAC 51-16-080 — Permit exemptions guideline (Washington statewide rule), quoted and re-checked
- Garfield County Public Works (garfieldcountywa.gov)
- RCW 58.17.030 — Subdivisions to comply with chapter, local regulations (Washington statewide rule), quoted and re-checked
- Planning & regulation — Washington State Department of Ecology (Washington statewide rule), quoted and re-checked
- Garfield County Health District (garfieldcountywa.gov)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- RCW 59.30.020 — Definitions (Washington statewide rule), quoted and re-checked
- RCW 47.32.150 — Approach roads, other appurtenances—Permit (Washington statewide rule), quoted and re-checked
- RCW 19.27.095 — Building permit application—Consideration—Requirements (Washington statewide rule), quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
Written September 28, 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.