Zoning in Washington
What you can use the land for and how close to the lines you can build.
Washington State Department of Commerce
Washington plans under the Growth Management Act: urban growth areas, critical areas and comprehensive plans. If a rule about building on rural land seems strange, the reason usually starts here.
About zoning
Zoning describes allowed land uses and development standards. The responsible county, city, or other local planning office depends on the property location. Use its zoning map and current ordinances, then contact the office about your project.