Accessory dwelling unit permit cost

Looking for accessory dwelling unit permit cost in San Francisco, CA? Call AccessoryDwellingUnit Direct for a contact a provider — no obligation. Licensed adu builders serve San Francisco and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

Securing permits is a mandatory step that covers city review fees, impact fees, and inspections to ensure your build meets safety codes. These costs vary significantly by city and the scope of your specific project. Because local jurisdictions set their own fee structures, we assist you in estimating these expenses during our initial consultation. We ensure you have a clear picture of all regulatory requirements before you begin. Exact pricing confirmed free on the call.

Frequently asked in San Francisco

What are the disadvantages of ADUs in San Francisco?

Disadvantages in San Francisco can include navigating the city's stringent permitting process, which can be lengthy and complex. High construction costs due to labor and material prices are also a factor. However, the significant increase in property value and potential rental income often makes it a worthwhile investment.

How much does an ADU cost in California?

What are the rules for ADUs in California?

California has state laws designed to encourage ADUs, but San Francisco also has its own detailed zoning ordinances and building codes. These cover everything from setbacks and lot coverage to design review. We can help you understand these specific requirements for your project.

Is an ADU allowed in San Francisco?

Yes, ADUs are allowed in San Francisco, and the city has made efforts to streamline the process. There are specific regulations regarding size, placement, and impact on existing infrastructure that must be followed. We can help you navigate these rules effectively.

What is the accessory dwelling unit permit cost in San Francisco?

Also serving nearby: Daly City · Richmond · San Mateo · Berkeley · Oakland

All cities in California →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

808,988residents

17,323per sq mile

8ZIP codes served

Serving all of San Francisco — population 808,988; about 17,323 residents per square mile across 46.7 sq mi. ZIP codes covered include 94102, 94103, 94104, 94105, 94107, 94108, 94109, 94110.

Neighborhoods served in San Francisco: The Richmond, The Sunset, Mission District, Nob Hill, Haight-Ashbury, Pacific Heights — and every surrounding area.