Adu services — San Francisco, CA | AccessoryDwellingUnit Solutions

Looking for adu services 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

ADU services manage the technical and creative side of building a secondary unit on your lot. Whether you are converting a garage or building a new structure from the ground up, you need these services to bridge the gap between architectural plans and physical construction. They help manage site preparation, utility connections, and structural integrity, ensuring your project is ready for occupancy without you having to coordinate multiple subcontractors independently.

Frequently asked in San Francisco

What are the disadvantages of ADUs in San Francisco?

How much does an ADU cost in California?

ADU costs in California, especially in a high-cost market like San Francisco, can range widely. Factors such as size, foundation requirements, design complexity, and the finishes chosen all impact the price. Site preparation and utility connections are also significant considerations. For an accurate estimate tailored to your San Francisco property, a professional quote is essential.

What are the rules for ADUs in California?

California has state laws promoting ADUs, but San Francisco has its own specific local ordinances that must be followed. These rules cover aspects like lot size, setbacks, owner occupancy requirements, and impact fees. Understanding both state and city regulations is crucial. A professional can explain how these rules apply to your property in San Francisco.

Is ADU allowed in Maryland?

This service focuses on ADU projects within California, specifically in the San Francisco Bay Area. Regulations for Accessory Dwelling Units vary greatly by state and municipality. For ADU information and services in Maryland, you would need to consult local resources and providers in that state. We specialize in San Francisco ADU solutions.

How do I get permits for an ADU 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 Mission, Haight-Ashbury, Richmond District, Sunset District, Pacific Heights, North Beach — and every surrounding area.