San Diego ADU Feasibility Checker
Quickly check if your San Diego property is likely eligible for an accessory dwelling unit (ADU). Based on typical lot, zoning, setback, and utility rules.
Feasibility result
Likely feasible
Max detached ADU size
1,200 sq ft
Estimated cost range
$311,950 – $422,050
Permit timeline
60–120 days
Construction timeline
12–24 weeks
This is a high-level feasibility check based on typical San Diego ADU rules and observed Precision SD project economics. A property-specific consultation is required for a definitive answer.
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Frequently Asked Questions
State law allows ADUs on lots zoned for residential use, but local rules affect setbacks and maximum unit size. This checker uses a 5,000 sq ft minimum as a practical San Diego guideline.
Most single-family properties in San Diego can add a detached ADU up to 1,200 sq ft, subject to setbacks and utility access. A site-specific consultation confirms exact eligibility.
City of San Diego ADU permits typically take 60–90 days, while County of San Diego reviews can take 90–120 days. Structural or coastal issues add time.
