Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
Frequently asked in San Francisco
What does an accessory dwelling unit mean in San Francisco?
An accessory dwelling unit, or ADU, in San Francisco is a secondary housing unit on a single-family lot. It's a self-contained living space with its own kitchen and bathroom. These can be attached to the main home or detached in the backyard. San Francisco has specific regulations to encourage ADU development. This provides more housing options.
What is the cost of an accessory dwelling unit in San Francisco?
What's involved in accessory dwelling unit construction in San Francisco?
Accessory dwelling unit construction in San Francisco involves careful planning and adherence to local codes. This includes design, obtaining permits from the city, and managing the build process. The pros we work with are experienced in navigating San Francisco's planning department. They ensure compliance with all regulations. This guarantees a smooth process.
Can I build a backyard accessory dwelling unit in San Francisco?
Yes, you can build a backyard accessory dwelling unit in San Francisco. The city has regulations that permit detached ADUs on many single-family lots. The pros will assess your property for feasibility. They'll ensure the design meets setback and height requirements. This is a popular way to add space.
What's involved in an ADU quote in San Francisco?
What are accessory dwelling units (ADUs) in San Francisco?
Accessory dwelling units (ADUs) in San Francisco are secondary housing units on existing residential lots. They offer flexible living solutions. These can be attached, detached, or internal conversions. San Francisco encourages ADUs to increase housing stock. They are a practical addition to many properties.
What is the accessory dwelling unit construction cost in San Francisco?
Also serving nearby: Daly City · Richmond · San Mateo · Berkeley · Oakland
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
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 District, Nob Hill, Pacific Heights, Outer Sunset, Hayes Valley — and every surrounding area.
More services in San Francisco
Everything else we cover here.
24 hour adu · accessory dwelling unit · accessory dwelling unit builders · accessory dwelling unit builders near me · accessory dwelling unit companies · accessory dwelling unit construction · accessory dwelling unit construction cost · accessory dwelling unit contractor · accessory dwelling unit contractor san diego · accessory dwelling unit cost · accessory dwelling unit financing · accessory dwelling unit for rent · accessory dwelling unit grants · accessory dwelling unit homes · accessory dwelling unit massachusetts · accessory dwelling unit near me · accessory dwelling unit new hampshire · accessory dwelling unit permit · accessory dwelling unit permit cost · accessory dwelling unit rental · accessory dwelling unit services · accessory dwelling units adus · adu builder · adu building · adu company · adu construction · adu cost · adu estimate · adu housing · adu near me · adu permit · adu quote · adu services · adu unit · affordable accessory dwelling unit · affordable adu · backyard accessory dwelling unit · best accessory dwelling unit · best adu · cost of accessory dwelling unit · cost to build accessory dwelling unit · detached accessory dwelling unit · emergency adu · homes with in law suites · homes with mother in law suites · modular accessory dwelling unit · prefab adu · prefabricated accessory dwelling unit · what does accessory dwelling unit mean
Areas we serve
Browse by state, then city.
Alabama (2)
California (14)
All of California · Bakersfield · Berkeley · Chula Vista · Downey · Garden Grove · Hesperia · Inglewood · Los Angeles · Merced · Norwalk · Rancho Cucamonga · San Francisco · Thousand Oaks · Torrance
Colorado (2)
Connecticut (1)
District of Columbia (1)
Florida (9)
All of Florida · Cape Coral · Clearwater · Davie · Deltona · Lakeland · Miami · Palm Bay · Palm Coast · Port St. Lucie
Georgia (3)
Idaho (1)
Illinois (1)
Indiana (1)
Iowa (1)
Kansas (1)
Louisiana (2)
Massachusetts (2)
Michigan (3)
Minnesota (1)
Missouri (1)
Montana (1)
Nevada (2)
New Jersey (1)
New Mexico (1)
New York (1)
North Dakota (1)
Ohio (1)
Oregon (3)
Pennsylvania (2)
Tennessee (1)
Texas (7)
All of Texas · Corpus Christi · Fort Worth · Georgetown · Grand Prairie · Killeen · Laredo · San Antonio
