Accessory dwelling unit permit cost

Looking for accessory dwelling unit permit cost in San Francisco, CA? Call AccessoryDwellingUnit Solutions 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 several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

Permitting is a necessary step that varies significantly depending on your local city or county regulations. These fees often cover zoning reviews, impact assessments, and building inspections. Because every jurisdiction has different fee structures, these costs fluctuate based on where your property is located. We help you navigate these requirements during the planning phase to ensure everything is handled correctly. Exact pricing confirmed free on the call.

Frequently asked in San Francisco

What are the disadvantages of ADUs?

The main drawbacks of ADUs include the significant upfront construction costs and the often lengthy permitting process in cities like San Francisco. You should also consider the impact on your property's privacy and yard space. Balancing these with the benefits is important.

How much does an ADU cost in California?

What are the rules for ADUs in California?

California has statewide ADU laws designed to streamline their creation, but San Francisco has its own detailed municipal codes. These cover everything from minimum unit size to parking requirements and impact fees. Understanding these specific regulations is crucial.

Is ADU allowed in Maryland?

While regulations vary, many areas are embracing ADUs. For San Francisco, California, we have local expertise. If you're considering Maryland, you'll need to research their specific state and local ADU laws. Each city has its own unique requirements.

California has implemented various grant programs to assist with ADU construction costs, though availability and amounts can vary. These programs often focus on affordability or specific community benefits. We can discuss potential funding avenues during your consultation.

What is the accessory dwelling unit permit cost?

The accessory dwelling unit permit cost in San Francisco is influenced by city fees, impact fees, and the complexity of your project. These costs are a significant part of the overall ADU budget. A detailed quote will break down these anticipated expenses for you.

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 District, The Sunset District, Nob Hill, The Mission District, Haight-Ashbury — and every surrounding area.