San Diego ADU Permit Information
The San Diego Building & Safety Division streamlines ADU approvals, offering in‑person, online, and plan‑check options for homeowners and contractors.
Building Code
Contact AHJ
Climate Zone
Varies
Permit Time
Varies
AHJ
Local Authority
The San Diego Building & Safety Division serves as the Authority Having Jurisdiction for Accessory Dwelling Units. All ADU projects must comply with the 2021 International Residential Code as adopted by the City, as well as local amendments found in San Diego Municipal Code Chapter 12. The Division reviews site plans, structural calculations, and utility connections to ensure safety and code compliance. Residents can start the process by visiting the city’s online portal or by stopping at the Division’s office on Front Street. Understanding the required documents and review steps helps keep timelines short and avoids costly revisions.
What Your ADU Permit Application Needs
A complete ADU application includes a completed permit form, site plan showing setbacks, floor plans, elevations, and structural details. You must also provide proof of ownership, a recent property survey, and any required utility impact studies. If the ADU will be attached to the primary residence, additional fire‑rating documentation and egress requirements are required. All drawings should be stamped by a licensed design professional and submitted in the format specified on the portal.
The Division also requires a fee schedule acknowledgment, a copy of the homeowner’s insurance, and, when applicable, a neighborhood association approval letter. For projects in flood‑prone zones, a certified flood‑risk assessment must accompany the submission. Once all items are gathered, you can submit the package over the counter, upload it through the portal, or deliver it for plan‑check review.
Common Project Types
Detached ADU
Standalone unit on the same lot, meeting setback and height limits.
Attached ADU
Unit sharing a wall with the primary residence, requiring fire separation.
Garage Conversion
Existing garage transformed into living space, with ventilation and egress upgrades.
Junior ADU
Smaller unit up to 500 square feet, often within an existing structure.
Building Department
- Authority
- San Diego Building & Safety Division
- Address
- 1600 Front St, San Diego, CA
- Permit Portal
- San Diego Permit Portal
- Fees
- Fees are based on project size and scope; consult the portal for the current schedule.
Frequently Asked Questions
How long does the first review take for an ADU permit?
The Division typically completes the initial review within five business days after a complete submission. Complex projects or those requiring additional agency input may take longer, but the team provides status updates through the portal.
Can I submit my ADU plans online?
Yes, the San Diego Permit Portal accepts electronic plan sets, supporting PDF and CAD formats. After uploading, you receive a confirmation email and can track review progress in real time.
What local amendments affect ADU design in San Diego?
San Diego has specific setback, height, and parking requirements outlined in Municipal Code Chapter 12. The city also enforces design guidelines for historic districts and coastal zones, which are detailed on the Division’s website.
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