What permits do you need to convert a garage in San Francisco?

Garage conversions are one of the most popular ADU pathways in San Francisco, and one of the most misunderstood from a permit standpoint.

Yes, you need a permit

Any garage conversion in San Francisco requires a building permit. There is no threshold below which a conversion is permit-exempt. If you're changing the use of the space, you need a permit.

What type of permit depends on what you're building

Converting to an ADU, file under San Francisco's ADU ordinance. Converting to additional living space attached to your primary residence, standard residential permit process. Creating a JADU, similar to a full ADU but with different size limits.

What the SF permit process looks like

You'll submit to the San Francisco Department of Building Inspection. Plan check typically takes 6–10 weeks for an over-the-counter ADU application. More complex projects take longer.

The most common issues we see: unclear site plan details, incorrect project description, missing fire separation documentation, and parking replacement analysis not addressed.

One thing most people don't know

San Francisco has a Pre-Application Process for some ADU projects. Skipping it when it's recommended is one of the fastest ways to get a correction notice that sets you back 4–6 weeks.

If you're planning a garage conversion in SF, our ADU Feasibility Report will tell you exactly what you're dealing with in 2–3 business days.

Book at permit-box.co.