Building Setbacks & Zoning in Sammamish, WA (2026)
3 verified building setbacks & zoning rules for Sammamish, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
Setback Rules
Sammamish uses dynamic single-family setbacks that grow with house size. A house under 2,500 square feet needs about a 15-foot front, 5-foot side, and 15-foot average rear setback, while larger homes require deeper setbacks. Lots on arterial streets need a 30-foot front setback.
Sammamish Building Setback Rules
Some RestrictionsStructure Height Limits
Sammamish limits residential building height to 35 feet in the R-1 through R-8 zones (with a 24-foot sidewall limit in R-4) and 60 feet in R-12 and R-18. Height is measured from average existing grade, and certain rooftop features may extend above the limit.
Sammamish Structure Height Limits
Some RestrictionsLot Coverage Limits
Sammamish limits how much of a residential lot can be covered by buildings and hard surfaces. Maximum building lot coverage is about 40% in R-4 and 50% in R-6, and maximum impervious surface ranges from 30% in R-1 up to 85% in R-12 and R-18, with special rules for large lots.
Sammamish Lot Coverage Limits
Some RestrictionsLooking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Sammamish city rules.
Building Setbacks & Zoning in King County →