Unincorporated Douglas County, Washington requires permits for construction and land-use activities, and county Land Services reviews building plans and performs inspections during construction12. The county also has zoning, while the Chelan-Douglas Health District permits septic systems34. Before buying rural land, confirm the parcel's zoning, water source, septic feasibility and legal road access with the offices below.
At a glance
- Building permit
- Required for construction and land-use work, subject to listed exemptions1
- Zoning
- Yes, for unincorporated Douglas County3
- Septic permits
- Chelan-Douglas Health District5
- Owner-builder
- Contractor-registration exemption available, but permits still apply6
- Tiny home
- State code allows qualifying tiny houses; county siting approval still applies7
- RV living
- Private-land occupancy rule not confirmed; ask Land Services for the parcel3
- Septic soil suitability
- 18.9% of soils rate without severe limits for a conventional drain field8
- Property tax
- 0.8% effective rate; $3,168 median annual bill910
Who to call
Building permits
Construction permitting and inspection, land-use permitting, building-plan review, zoning and planning for unincorporated Douglas County
140 19th Street NW, Suite A, East Wenatchee, WA 98802
Septic permits
Chelan-Douglas Health District Environmental Health
Questions and applications for on-site septic systems in Douglas County
200 Valley Mall Parkway, East Wenatchee, WA 98802
Roads & driveways
County-road engineering, development review and questions about access to county roads
140 19th Street NW, Suite A, East Wenatchee, WA 98802
Contact details are copied from each office’s official page and were checked against it on September 27, 2026.
Do you need a building permit in Douglas County, Washington?
Yes. Unincorporated Douglas County requires permits before covered construction, alteration or demolition begins1. Land Services administers the International Building Code, the Washington State Building Code, and fire, life-safety and related codes11. Washington's state building code applies in every county and city, subject to the statutory exceptions and state amendments12. Douglas County lists limited exemptions for certain small accessory structures, retaining walls and finish work, but an exemption does not authorize work that violates another code, law or ordinance1. Ask Land Services before starting a shed, barn, remodel or off-grid cabin because the proposed use and structural work determine which approvals apply13.
Who handles Douglas County building permits and inspections?
Douglas County Land Services is the building and planning office for unincorporated Douglas County; it reviews building plans and performs required inspections throughout construction213. The office is at 140 19th Street NW, Suite A, East Wenatchee, WA 98802, and its phone number is 509-884-717313. County application forms and brochures are available through the document portal, and existing applicants can use the online permit search14. Permit intake runs from 7:00 a.m. to 4:00 p.m. daily, with limited staffing from 12:00 p.m. to 1:00 p.m.14. For a project-specific checklist or fee, describe the proposed structure, use and parcel to the permit center before preparing plans13.
Does Douglas County, Washington have zoning?
Yes. Douglas County zoning applies in unincorporated areas through county zoning districts, with separate mapping materials for the countywide area, the Greater East Wenatchee Area, and city and town urban growth boundaries315. The Planning Section reviews rezonings, conditional-use permits, subdivisions and site plans1613. Parcel zoning matters because allowable uses and development standards can change by district. We could not confirm one countywide rule for RV occupancy, minimum lot size, setbacks, lot coverage or zoning-based building height; ask Land Services to identify the district and standards for the parcel313. Washington's statewide interior-space rule sets habitable-room minimums, but it is not a county zoning minimum for total house size or lot size17.
How do septic permits work in Douglas County?
Chelan-Douglas Health District permits and inspects on-site septic systems in Douglas County54. Except for a minor repair, Washington requires an application and local-health-officer permit before installing, repairing, modifying, connecting to or expanding an on-site sewage system18. A lot without public sewer must have a suitable on-site sewer location plus a full reserve drainfield area, and new construction requires a septic permit; additional test pits may be required19. Only 18.9% of county soils rate without severe limitations for a conventional drain field, so septic feasibility deserves early attention before purchase8. Contact Environmental Health at 509-886-6400 or [email protected] for the application path20.
Can you live in an RV or tiny home in Douglas County?
We could not confirm a general rule allowing temporary or long-term RV occupancy on private land in unincorporated Douglas County, so ask Land Services about the parcel's zoning and proposed duration before relying on an RV as housing313. Washington's statutory RV definition describes temporary, transient living quarters that are not a primary residence, but that definition does not grant private-land siting permission21. A qualifying Washington tiny house may be built on wheels, may be no larger than 400 square feet, and must meet the Washington State Building Code; foundation, installation and location approvals still depend on the local building department7. Douglas County's zoning, building-permit and septic requirements therefore still apply to a tiny-home proposal315.
Building a home in Douglas County: the steps, in order
- Ask Land Services to confirm the parcel's zoning, allowed residential use, setbacks and required land-use review313.
- Establish water availability and, if there is no public sewer, obtain the required septic review and permit from Chelan-Douglas Health District1918.
- Confirm legal access; Washington requires county permission before constructing an approach to a county road, while a state-highway connection needs written state permission2223.
- Submit the building and land-use applications through Douglas County Land Services before covered work begins114.
- If acting as owner-builder, remember that Washington's exemption concerns contractor registration and does not erase building or trade permits24.
- Schedule and pass the inspections Land Services requires throughout construction2.
What should you check before buying land in Douglas County?
Start with zoning, legal access, water and septic rather than assuming a rural parcel is ready to build. Douglas County reviews subdivisions and site plans, and parcel rules vary by zoning district163. Only 18.9% of county soils rate without severe limitations for a conventional septic drain field, while annual precipitation averages 11.5 inches, making both wastewater planning and a dependable water source central due-diligence items825. We could not confirm a universal private-well permit rule or mandatory utility-connection rule; ask the health district about water review and Land Services about utilities for the specific parcel2013. Floodplain development in Washington requires a local floodplain permit, so ask Land Services whether mapped or locally regulated flood hazards affect the site2613. A county-road approach needs county permission; call Douglas County Transportation at 509-884-7173 about access2227. The effective property-tax rate is 0.8%, with a median annual bill of $3,168910.
Watch-outs
- An owner-builder exemption in Washington concerns contractor registration; Douglas County building, land-use, septic and trade permits still apply24.
- Only 18.9% of Douglas County soils rate without severe limitations for a conventional septic drain field, so do not treat vacant acreage as septic-ready without a site evaluation8.
- We could not confirm a general private-land RV occupancy rule for unincorporated Douglas County; get a parcel-specific answer from Land Services before using an RV during construction313.
Sources
- Building Construction Information, quoted and re-checked
- Land Services, quoted and re-checked
- Douglas County Code Title 18 Zoning (2026 county census)
- On-Site Septic Permitting Process, quoted and re-checked
- Chelan Douglas Health District On-Site Septic Permitting (2026 county census)
- Washington State Legislature - RCW 18.27.090 Exemptions (2026 county census)
- Tiny Houses (Washington statewide rule), quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Land Services, quoted and re-checked
- RCW 19.27.031 — State building code—Adoption—Conflicts—Opinions (Washington statewide rule), quoted and re-checked
- Douglas County Land Services (douglascountywa.gov)
- Building Construction Information, quoted and re-checked
- Reference Maps, quoted and re-checked
- Land Services, quoted and re-checked
- WAC 51-50-1208 — Section 1208—Interior space dimensions (Washington statewide rule), quoted and re-checked
- WAC 246-272A-0200 Permit requirements (Washington statewide rule), quoted and re-checked
- Land Use, quoted and re-checked
- Chelan-Douglas Health District Environmental Health (cdhd.wa.gov)
- RCW 59.30.020 — Definitions (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 47.32.150 — Approach roads, other appurtenances—Permit (Washington statewide rule), quoted and re-checked
- RCW 18.27.090 — Exemptions, quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Planning & regulation — Washington State Department of Ecology (Washington statewide rule), quoted and re-checked
- Douglas County Transportation (douglascountywa.gov)
Written September 27, 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.