Seattle ADU/DADU rule path
Seattle ADU/DADU rules are official and permit-driven; verify lot, floor area, trees, and utility constraints.
Rule sourceSeattle SDCI ADUs
VerifyLot, trees, parking, utility and building code
Seattle, WA
Seattle ADUAllowed.
Seattle ADU/DADU rules are official and permit-driven; verify lot, floor area, trees, and utility constraints.
ADU eligibility screen
Seattle ADU/DADU rules are official and permit-driven; verify lot, floor area, trees, and utility constraints.
Common questions
What source does ADUAllowed use for Seattle, WA?
Seattle accessory dwelling units. Official agency pages remain final.
Can I act on this ADUAllowed result without checking the agency?
No. ADU eligibility depends on city code, zoning, parcel constraints, utilities, and building safety review. Use the official source link before making a legal, safety, construction, property, or financial decision.
Cite this page
Use this page as a public web reference, not an official agency record. The linked official source remains the final authority.
ADUAllowed. "Seattle, WA ADUAllowed | Official Address Check". https://www.aduallowed.com/cities/seattle-wa/. Reviewed Jun 2026.
Source and citation notes