See what your lot allows, with the code to prove it.
Type an address. See how many homes and ADUs fit, how big they can be, the setbacks, fees and rent, with the code text beside every answer.
Every answer shows the rule behind it.
When the report says a taller ADU needs a 4 ft setback, the sentence that says so is right there, with the section number. You can hand it to your designer, your lender or the plan checker.
ADU rules for this lot
50 by 125 ft, City of San Diego
- Detached ADU
- Allowed
- §141.0302
- Largest ADU
- 1,200 sq ft
- §141.0302
- Stories
- Two at most
- §141.0302
- Side and rear setback, over 16 ft tall
- 4 feet
- §141.0302
“…if the side or rear property line abuts another premises that is residentially zoned or developed with exclusively residential uses, the minimum interior side yard and rear yard setbacks shall be 4 feet or the minimum setback of the applicable base zone, whichever is less”
- Report
- Sample
- Zone
- RS-1-7
- Source
- SDMC 141.0302
One place for the whole life of a property.
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Homeowners
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Builders and designers
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Investors and syndicates
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Landlords
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From an address to an answer in under a minute.
- Step 1
Type an address
Any address or parcel number in San Diego County. We find the parcel, its zone and the overlays on it.
- Step 2
Read the answer, rule by rule
Homes and ADUs allowed, sizes, heights, setbacks, parking and fees, each beside the code text it comes from.
- Step 3
Take it further
Download the report, price the build, save and compare lots, or set up the rental once it's built.
Built for San Diego County first.
Each jurisdiction’s rules are read from its own code, not guessed. More California cities are next.
- Local zoning and ADU rules, read from that jurisdiction’s code
- California’s ADU law, the floor every city must allow
- City of San Diego
- Every base zone and planned district, with the City's ADU rules and fees.
- Unincorporated San Diego County
- The County Zoning Ordinance, village zones and the County's ADU rules.
- Chula Vista and Oceanside
- Each city's own zoning, with state ADU law as the floor.
- Everywhere else in the county
- What California's ADU law guarantees on any lot with a home.
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