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ADU Feasibility Checker

Check if your Bay Area property qualifies for an ADU. Enter your city and lot details.

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Can You Build an ADU on Your Property?

Enter your property details to see ADU size limits, setback requirements, and parking rules for your city.

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Your property appears eligible for an ADU!

ADU Options for Your Property

    This is a general guide based on California and local regulations. Actual eligibility depends on specific zoning, easements, and city review. Contact us for a property-specific assessment.

    How long does this actually take?

    We analyzed thousands of real ADU permit applications in San Francisco, Los Angeles and San Diego to see how long permitting actually takes, and what happens to the ones that never get issued. See the real numbers →

    ADU Feasibility FAQ

    Common questions about ADU eligibility in the Bay Area.

    Most single-family residential lots in California can have at least one ADU under state law. However, specific lot constraints, setbacks, and local rules may limit what is possible.

    Detached ADUs can be up to 1,200 sq ft. Attached ADUs can be up to 50% of the primary home living area with a minimum of 800 sq ft allowed.

    Under California state law, no additional parking is required for ADUs within half a mile of public transit. Many Bay Area cities have adopted this exemption broadly.

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