Los Angeles
Los Angeles has a mature ADU rule path; verify parcel, zoning, setbacks, fire, and utility constraints before filing.
HighOfficial source path
ADU rule screen
Check ADU rules by address.
The local code and parcel facts decide the answer. Start with the official ADU rule and zoning source.
Quick answer
The local code and parcel facts decide the answer. Start with the official ADU rule and zoning source.
What the card returns
Screen whether an ADU may be allowed at an address.
ADU eligibility depends on city code, zoning, parcel constraints, utilities, and building safety review.
No fake build approvalUse the linked official source before acting on a high-stakes property or safety decision.
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
Common questions
Can ADUAllowed give a final yes/no answer?
Only when the connected official source supports it. Otherwise ADUAllowed shows the official source route, confidence, and the facts still needing verification.
Why does the exact answer depend on local sources?
These records and rules are controlled by city, county, state, district, or agency systems. The same street address can cross a boundary that changes the final answer.
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. "ADU Rules by Address | Can I Build an ADU?". https://www.aduallowed.com/adu-rules-by-address/. Reviewed Jun 2026.
Source and citation notes