Los Angeles
Los Angeles has a mature ADU rule path; verify parcel, zoning, setbacks, fire, and utility constraints before filing.
HighOfficial source path
City directory
ADUAllowed city pages.
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San Diego
San Diego ADU eligibility starts with companion/junior unit rules plus zoning and parcel constraints.
HighOfficial source path
San Jose
San Jose has official ADU rules and a local permit workflow; parcel facts still control final eligibility.
HighOfficial source path
Seattle
Seattle ADU/DADU rules are official and permit-driven; verify lot, floor area, trees, and utility constraints.
HighOfficial source path
Portland
Portland ADU rules use city permit guidance plus zoning and site constraints.
HighOfficial source path
Austin
Austin ADU eligibility depends on local land-development rules and property profile constraints.
HighOfficial source path
Denver
Denver ADU eligibility starts with whether the zone district allows ADUs, then design and permit review.
HighOfficial source path
Chicago
Chicago ADUs are allowed through a city program with location and ordinance constraints; verify address eligibility.
HighOfficial source path
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. "ADUAllowed City Directory | Official Source Pages". https://www.aduallowed.com/cities/. Reviewed Jun 2026.
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