Seattle imposes building height limits by zone under SMC Title 23, with residential NR zones limited to 30 feet plus rooftop features, and commercial/mixed-use zones allowing greater heights depending on density targets.
Height limits are established by zone in the Land Use Code. In NR3 zones (formerly SF5000), the maximum structure height is 30 feet, measured from existing or finished grade (whichever is lower) to the ridge or highest point. An additional 5 feet is allowed for pitched roofs with a minimum 6:12 slope. Certain rooftop features such as chimneys, antennas, and mechanical equipment may extend above the height limit within specific parameters. Solar panels within 4 feet of the roof surface do not count toward height. In Lowrise (LR), Midrise (MR), and Commercial zones, heights vary from 30 to 440+ feet depending on the zone designation. The 2025 NR zoning update maintained the 30-foot height limit for residential zones while allowing additional height for ADUs in some configurations. Floor Area Ratio (FAR) limits also constrain building bulk.
Exceeding height limits without an approved variance is a code violation. SDCI may deny permits, require redesign, or order removal of portions of structures that exceed allowable heights. Height violations are typically identified during plan review but may also be discovered through complaints or inspections.
Seattle, WA
Seattle's Land Use Code allows residential lawn ornaments, statuary, and yard art without permits provided structures do not exceed accessory-structure heigh...
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
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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 structure height limits.
See how Seattle's structure height limits rules stack up against other locations.
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