Building permits, zoning and land rules in Skamania County, Washington

Yes. Construction and improvements subject to Skamania County permitting require a building permit, with specific code exemptions still possible¹. Washington's State Building Code applies in Skamania County and is enforced locally⁸. Starting covered construction without a permit can trigger double the normal permit fee plus enforcement costs⁹. Skamania County publishes valuation- or construction-cost-based building fees, adds plan review at 65% of the permit fee, and lists separate inspection and environmental-health charges¹. The Building Division accepts applications through Cloudpermit, where applicants can track status, pay and schedule or cancel inspections¹⁰. A temporary growing structure used solely for horticultural production has a narrow state building-code exemption; that exception does not cover every barn, shop or dwelling¹¹.

Skamania County Community Development's Building Division handles building-permit applications and inspections¹⁰. The office is at 170 NW Vancouver Ave, with mail sent to PO Box 1009, Stevenson, WA 98648; call (509) 427-3925 or email building@skamaniacounty.gov¹⁰. Applicants can apply and manage inspections through Cloudpermit¹⁰. For zoning, land-use applications and subdivisions, contact the Planning Division at the same courthouse annex by calling (509) 427-3900 or emailing permitcenter@co.skamania.wa.us¹². Skamania County processes short plats and subdivisions through land-development review, including septic and water review¹. Published fee schedules cover building, inspection, environmental-health and on-site sewage work, but the final price depends on project valuation, construction cost and the applicable review charges¹.

Yes. Skamania County administers zoning and publishes classifications with district-specific use and development standards⁴. Unincorporated parcels are regulated under county zoning, while specified Columbia River Gorge General Management and Special Management Areas also have Title 22 controls^2,5. In the R-10 district, the minimum lot size is 10 acres; access panhandles do not count toward lot area⁴. R-10 side and rear setbacks are 20 feet, while the front setback depends on the public-road centerline, private-road centerline or front property line; lots under 2 acres follow standard building-code setbacks⁴. Permitted R-10 uses generally have a 35-foot height limit above average site grade, subject to the cited code exception⁴. Skamania County's Building Department handout sets a floor for dwelling units rather than a total square footage: at least one habitable room needs 70 square feet of floor area, plus a toilet, sink, bath or shower, and a kitchen with a sink¹³. Ask Planning to identify the parcel's exact district and Gorge status before designing, because the district figures above are not countywide standards¹².

Skamania County Environmental Health administers on-site sewage permits and related inspections¹. Except for a minor repair, installing, repairing, modifying, connecting to or expanding an on-site sewage system requires a permit before construction¹⁴. A new build, expansion or repair without records needs a site evaluation, and the completed system must be inspected before cover¹⁵. Soil feasibility belongs near the start of due diligence because only about 4% of mapped county soils lack severe limitations for a conventional drain field¹⁶. Skamania County also reviews septic and water as part of short-plat or subdivision review¹. Environmental Health lists separate on-site sewage fees, and unpermitted OSS work is charged double the required permit fee¹. Call 509-427-3903 or email permitcenter@skamaniacounty.gov for the On-Site Sewage Program¹⁵.

Unincorporated Skamania County limits RV occupancy on private land to no more than 14 consecutive days and no more than 120 days in a calendar year, unless a temporary dwelling permit applies¹⁷. The Planning Division can issue a temporary dwelling permit for one RV or other temporary dwelling per parcel in only two cases: continuous care or assistance for a person living on the parcel, or an owner who is building or placing a dwelling to live in¹⁷. The permit lasts 1 year or until those facts end, whichever comes first, and the RV must keep a current vehicle license, meet setbacks and county health-department requirements, and not be rented¹⁷. A care-based permit can be renewed if the request is filed at least 30 days before expiration; a building-based permit can be renewed once¹⁷. Within the Title 22 Gorge area, an RV, qualifying tiny home on wheels or manufactured home may be occupied as a hardship dwelling only for necessary care of an infirm or aged family member, for up to 2 years, and it must be removed within 30 days after expiration or the end of the hardship⁵. A code-built Washington tiny house may contain no more than 400 square feet, but local foundation, installation, location and permit approval still apply¹⁸. Skamania County also requires a license before a short-term vacation rental is offered, advertised or rented⁷.

1. Ask Planning for the parcel's zoning classification and whether Gorge or floodplain controls apply^4,12,19.
2. Establish potable water and septic feasibility; a new build without prior soil records needs a site evaluation¹⁵.
3. Obtain the on-site sewage permit before covered septic construction begins¹⁴.
4. Secure county permission for an approach to a county road or written WSDOT permission for an approach on a state-highway right-of-way^20,21.
5. Apply for the building permit through Cloudpermit and budget for the valuation-based permit fee, added plan review and applicable inspections^1,10.
6. If acting as owner-builder, treat the contractor-registration exemption separately from every required trade and land-use permit³.
7. Complete required inspections, including the septic inspection before cover^15,22.
8. For an ADU, prove potable water and septic capacity, then record the covenant after final inspection and before the certificate of occupancy⁶.

Start with usable ground rather than deeded acreage alone: about 18.8% of Skamania County land has a slope of 15% or less, about 92.3% is wooded and about 85.1% is federal land¹⁶. Confirm the parcel's zoning classification and Gorge or floodplain status because district standards and overlays change what can be placed where^4,5,19. Test septic feasibility early because only about 4% of mapped soils lack severe limitations for a conventional drain field¹⁶. For a well, the owner or agent must notify the Washington Department of Ecology at least 72 hours before covered construction, reconstruction or decommissioning begins²³. Verify legal road access and the correct approach permission^20,21. Carrying-cost benchmarks include an effective property-tax rate near 0.7%, a median annual tax bill near $3,380 and a typical annual home-insurance premium near $1,309¹⁶.