King County itself imposes no primary-residence restriction on short-term rentals in unincorporated areas, but several cities within the county, most notably Seattle, limit operators to their primary dwelling plus at most one additional unit.
Seattle Municipal Code 6.600 caps STR operators at two units total: a primary residence and one secondary dwelling, each requiring a separate operator's license. Bellevue, Redmond, and Kirkland have studied similar caps but as of 2026 enforce only registration and lodging-tax collection. Unincorporated King County imposes no primary-residence test; rural cabins, ADUs, and second homes may all be listed. Hosts should verify city of jurisdiction before listing because city limits do not always track ZIP codes, and a Seattle mailing address may sit outside Seattle city limits.
Seattle operators exceeding two-unit cap face license revocation, daily fines, and platform takedown. Unincorporated hosts face no primary-residence penalty but must comply with state RCW 64.37 obligations.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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
Seattle does not regulate residential inflatable holiday decorations by size or type. Standard Noise Ordinance (SMC 25.08) limits apply to blower-motor noise...
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...
See how Seattle's primary-residence-only rule rules stack up against other locations.
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