Seattle, WA Zoning Overlays & Bonuses: Density Bonus Law (2026)
California Density Bonus Law (Gov Code §65915) and local implementations granting up to 50% density bonuses for affordable-housing projects.
Research in progress
We are currently verifying Seattle's specific local ordinance for density bonus law. In the meantime,Washington state law generally applies, and below you'll find guidance for finding the official rules and links to related Seattle ordinances we've already verified.
Washington State Law Context
Washington state law provides the baseline framework for density bonus law across all municipalities in the state. Individual cities like Seattle may adopt additional local rules on top of state requirements, which is what makes checking your specific city ordinance important. For Seattle residents, the safest approach is to follow state law as a baseline and contact City Hall for any additional local requirements.
You can browse all Washington zoning overlays & bonuses to see how cities across the state regulate this topic.
How to find official Seattle Density Bonus Law rules
- Search for "Seattle WA municipal code" to find your city's online code portal (Municode, eCode360, or American Legal Publishing are the most common).
- Look for chapters covering zoning overlays & bonuses, zoning, nuisance, or property maintenance — that's where most density bonus law rules live.
- Contact Seattle City Hall's code enforcement, planning, or community development department for clarification.
- Check with your HOA if applicable — many HOAs have stricter rules than the city itself.