San Diego ADU Rules & Regulations
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ADU Rules and Regulations in San Diego
San Diego permits Accessory Dwelling Units (ADUs) and Junior ADUs (JADUs) on residentially zoned properties under California state law and the San Diego Land Development Code.
What You Can Build
- Detached ADU: A standalone structure up to 1,200 square feet with 4-foot rear and side setbacks, up to 16 feet tall.
- Attached ADU: An addition to or conversion within the primary dwelling.
- Junior ADU (JADU): Up to 500 square feet converted from existing space within the primary dwelling.
- Garage Conversion: Convert an existing garage without replacement parking.
Size and Dimensional Standards
| Standard | Requirement |
|---|---|
| Max ADU size | 1,200 sq ft |
| Max ADU height | 16 ft |
| Rear setback | 4 ft |
| Side setback | 4 ft |
| Max JADU size | 500 sq ft |
Parking
No additional parking is required for ADUs in San Diego. Replacement parking is not required when converting a garage.
Permit Process
- Review your property's zoning using the city's GIS tools
- Choose a design or select from the city's pre-approved ADU plans
- Submit a building permit application to Development Services
- Ministerial review within 60 days
- Receive permit, build, and schedule inspections
Fees
Permit fees typically range from $2,500 to $12,000. ADUs under 750 square feet are exempt from development impact fees per state law. San Diego has also reduced or waived certain local fees for ADU construction.
More about San Diego Zoning
Sources
- City of San Diego - ADU Information·sandiego.gov·Accessed 2026-03-22·Direct link
- San Diego Municipal Code - ADU Regulations·sandiego.gov·Accessed 2026-03-22·Direct link(Section: Land Development Code, Chapter 14, Article 1, Division 2)
FAQ
Frequently Asked Questions
Does San Diego offer pre-approved ADU plans?
Yes. The City of San Diego offers a catalog of pre-approved ADU plans that can significantly reduce design costs and expedite the permit process.
Can I build an ADU on my property if I have an HOA?
California state law (AB 68, AB 881) limits the ability of HOAs to prohibit ADUs outright. However, HOAs may impose reasonable design and aesthetic requirements. Check your CC&Rs and consult with your HOA.
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Always verify current requirements with your local planning department.