Land — Pacific Northwest — WA
Water rights, rainwater law, cottage food rules, right-to-farm protections, livestock zoning, and growing conditions for Washington landowners and buyers.
Land law varies by county, municipality, and HOA. Verify all information with your county planning department, state water agency, and a licensed attorney before any land purchase or development decision.
Water law
Hybrid: prior appropriation for surface water; permit system for groundwater. All water owned by state. Domestic wells up to 5,000 gallons/day exempt. Contact WA Dept. of Ecology (ecology.wa.gov).
Legal. RCW 90.44.280 explicitly authorizes residential collection from rooftop surfaces for beneficial use on the property where collected. No volume limit.
Land use and production law
Washington Cottage Food Law: $25,000 gross annual cap; direct consumer, farmers markets, and limited online sales; label required. Verify with Washington State Department of Agriculture.
Washington Agricultural Protection Act (RCW 7.48.300) protects established agricultural operations.
East of Cascades agricultural and rural zones broadly permissive. King, Pierce, Snohomish, and Clark county suburban zones have significant restrictions. Seattle and most Puget Sound cities allow limited backyard chickens with permit.
Growing conditions
Hardiness zones
4a (northeast/Okanogan Highland) – 9b (Puget Sound lowlands/Olympics)
Last frost
Jun 1 (eastern plateau high) – Feb 1 (western lowlands)
First frost
Sep 15 (eastern/north) – Dec 1 (western lowlands)
Free soil testing
Washington State University Extension — click to visit
Soil notes
Eastern Washington Palouse region has deep loess Mollisols. Western Washington has acidic, high-organic-matter soils that need drainage. Yakima Valley alluvial soils are excellent with irrigation.