Yurt building regulations and zoning laws for unconventional homes in Washington State vary depending on the county and the type of land. Some counties, such as Thurston and San Juan, have specific regulations for yurts, while others require unconventional homes to meet the same zoning and building codes as traditional homes. Some counties may allow yurts on rural or agricultural land, while others may not permit them at all. It is important to research and comply with local zoning laws and building codes before constructing an unconventional home in Washington State. However, with proper research and adherence to regulations, it is possible to legally live in a yurt or other unconventional housing structure in some areas of the state.