How to get an ADU permit in San Diego
How do I get an ADU permit in San Diego?
Confirm feasibility, have plans and Title 24 energy calcs prepared, submit through the City's online permit portal, answer correction rounds, pay fees, then build and pass inspections. Across all 2026 City of San Diego ADU permits, the median was 298 days from application to issue.
Steps
- Feasibility: zoning, setbacks, easements, sewer lateral, fire access, coastal zone.
- Design: architectural, structural and Title 24 energy (solar for most new detached units).
- Address and utilities: SDG&E notes you need an address for the ADU before applying for new service; allow about 2 weeks for SDG&E review.
- Submit to City Development Services and pay plan check fees.
- Corrections: usually the longest stage.
- Issue and build, with inspections at each stage.
- Final and utility release.
Fees
Development Impact Fees are waived under 750 sq ft and for the first two ADUs on a lot; school, plan check and permit fees still apply. Fee notes · Timeline data
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Questions San Diego homeowners ask
How long does an ADU permit take in San Diego?
Median 298 days from application to issue across 2026 City ADU permits.
Can I apply myself?
Yes, but most homeowners use a design-build firm or architect to manage plan check and corrections.
Do I need SDG&E approval?
If you need new or larger electrical service, yes. Apply through SDG&E My Project Center once the ADU has an address.
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