Seattle enforces specific yard setback requirements under SMC Title 23 that vary by zone, with the 2025 NR zoning reclassification establishing standardized setbacks of 5 feet on sides and 20 to 25 feet in front for residential zones.
Seattle's Land Use Code (SMC Title 23) establishes required setbacks (yard requirements) for all zones. Under the 2025 zoning update, former single-family zones were reclassified as Neighborhood Residential (NR1, NR2, NR3). In NR3 zones (most common, formerly SF5000), the front yard setback is 20 feet, side setbacks are 5 feet, and rear setbacks are 25 feet (reduced to 20 feet for lots less than 85 feet deep). In NR1 and NR2 zones, setbacks are generally similar. Commercial and mixed-use zones have different setback requirements, often with zero front setbacks to maintain street-wall continuity. Accessory dwelling units and detached accessory structures have specific setback provisions. Setback reductions may be available through administrative variance processes where physical site constraints exist.
Construction that encroaches into required setbacks without an approved variance is a code violation. SDCI may issue stop-work orders, require demolition or modification of encroaching structures, and impose fines. Setback violations discovered during sale inspections may need to be resolved before closing.
Seattle, WA
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Seattle, WA
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Seattle, WA
Seattle has no ordinance restricting when residents may put up or take down holiday lights. The general Noise Ordinance SMC 25.08 applies to any amplified ou...
Seattle, WA
Built-in outdoor kitchens in Seattle require building permits from SDCI when they include new electrical, plumbing, gas piping, or a structural roof under Se...
Seattle, WA
Backyard wood and pellet smokers in Seattle are allowed at single-family homes but are subject to Puget Sound Clean Air Agency (PSCAA) Regulation I, Section ...
Seattle, WA
Seattle Fire Code Section 308.1.4 prohibits open-flame cooking devices and LP-gas containers larger than 1 lb on combustible balconies of multi-family buildi...
Side-by-side rule comparisons with other cities in King County.
See how other cities in King County handle setback rules.
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