Spokane controls oversized infill homes through SMC Chapter 17C lot coverage, building height, and floor area regulations rather than a dedicated mansionization ordinance, with stricter limits in residential single-family RSF and historic overlay zones.
Unlike Los Angeles, Spokane has not adopted a stand-alone mansionization ordinance. Instead SMC Chapter 17C combines maximum building heights, lot coverage caps, and required side and rear yards to limit how much home can fit on a residential lot. Most RSF zones cap height around thirty-five feet and lot coverage near forty to forty-five percent. Historic districts including Browne's Addition and the South Hill historic overlay layer additional design review through the Spokane Historic Landmarks Commission. Recent Comprehensive Plan updates allow more middle-housing forms (duplex, triplex) instead of larger single-family mansions on infill lots.
Exceeding height, coverage, or setback limits can produce stop-work orders, code-enforcement civil penalties, and required redesign or removal before final inspection or occupancy.
Spokane, WA
Spokane limits residential lot coverage under SMC 17C.110. RSF zones typically allow 45-50% building coverage. HB 1110 middle-housing rules may adjust covera...
Spokane, WA
Spokane caps residential structure height at 35 feet in RSF zones under SMC 17C.110. Accessory structures limited to 20-24 ft. Downtown and Center zones allo...
See how Spokane's anti-mansionization rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.