ADU Contractors near San Francisco, CA
DeHaro Construction Inc
6411 Brisa Street, Livermore, CA 94550
37.8 miles
Deharo Construction is a trusted ADU builder serving Livermore, Pleasanton, and Dublin. Specializing in accessory dwelling units, new construction, and home additions, they deliver custom granny flats, detached ADUs, and in-law suites across the T... read more
Mountain Top Construction
30 North San Pedro Road, San Rafael, CA 94903
17.2 miles
Mountain Top Construction is a Bay Area ADU builder serving San Rafael, San Francisco, and Las Vegas. They specialize in detached ADUs, backyard cottages, granny flats, and in-law suites, managing design, permitting, and construction.
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California Building and Remodeling
1900 Camden Avenue, Albany, CA 95124
44.5 miles
California Building and Remodeling offers ADU construction, kitchen & bathroom remodeling, roofing, and concrete services in Albany, CA and the Bay Area. Experienced ADU contractor serving Albany, Berkeley, Richmond & more.
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Alon Design & Remodeling
722 Charcot Avenue, San Jose, CA 95131
39 miles
Alon Design & Remodeling is a leading ADU contractor offering detached, attached, garage conversion, basement, and JADU options. ADUs boost property value, generate rental income, and provide independent living spaces with full amenities.
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Geico Builders
1901 Harrison Street, Oakland, CA 94612
10.4 miles
Geico Builders offers ADU services including detached ADUs, attached ADUs, Junior ADUs, garage conversions, and home additions. Ideal for rental income, family housing, or maximizing space on your existing property.
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Barcci Builders
16185 Los Gatos Boulevard, Los Gatos, CA 95032
44.7 miles
Barcci Builders specializes in ADU construction across the Bay Area, offering design, permitting, and build services. With 40+ completed units, they handle JADUs, garage conversions, attached, and detached ADUs, with costs ranging from $60K to $40... read more
Realty Builders Inc.
50 California Street, San Francisco, CA 94111
3.7 miles
Realty Builders Inc. is a licensed ADU contractor specializing in custom accessory dwelling units, including in-law suites, granny flats, garage conversions & rental units, offering streamlined permitting & guaranteed workmanship.
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Vargas Construction
16064 Vía Harriet, San Lorenzo, CA 94580
18.3 miles
Vargas Construction is a California ADU contractor offering detached, attached, garage, junior, and multifamily ADUs. They handle design, permitting, and construction with energy-efficient materials, custom interiors, and full amenities in 2–6 m... read more
Mendez and Son's Construction Inc
39647 Iolani Ct., Fremont, CA 94538
29.4 miles
Mendez and Son's Construction is a Bay Area ADU contractor offering design-build services in Palo Alto, Mountain View, San Mateo & Walnut Creek. They handle detached ADUs, garage conversions & JADUs, managing permits to final inspection.read more
Top Rated Builders
5450 Thornwood Drive, San Jose, CA 95123
47.3 miles
At Top Rated Builders, we offer expert ADU construction services tailored to meet your specific needs. Whether you’re looking to add a studio ADU, a one-bedroom ADU, or a larger family unit, our experienced team will guide you through the entire... read more
ADU For You
1755 East Bayshore Road, Redwood City, CA 94063
22.5 miles
ADU For You is a Bay Area ADU builder based in Redwood City, offering end-to-end services including design, permits, and construction. Serving 1,000+ clients, they specialize in custom detached ADUs, granny flats, and in-law suites at competitive ... read more
King David Construction
3000 El Camino Real, Palo Alto, CA 94306
28.5 miles
King David Construction is a Palo Alto ADU contractor offering full-service design, permitting & construction across the Bay Area. Specializing in detached ADUs, garage conversions & in-law suites.
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Design and Construction by M&M
100 South Murphy Ave STE 200, Sunnyvale, CA 94086
34.7 miles
Bay Area general contractor Design and Construction by M&M specializes in ADUs, remodeling, room additions, and custom builds. Serving Burlingame, Los Altos, and Campbell, they manage design, permitting, and construction. Free consultations av... read more
New Key Construction
2890 North Main Street, Walnut Creek, CA 94597
24 miles
Home Quality Remodeling
3033 Moorpark Avenue, San Jose, CA 95128
40.8 miles
Home Quality Remodeling Inc. is a licensed Bay Area general contractor (CSLB #838832) with 20+ years of experience. Services include kitchen & bathroom remodeling, room additions, ADUs, and outdoor living across California and New Jersey.
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Other cities in California
What you need to know
ADU Contractors in San Francisco: Navigating One of the Most Complex Building Environments in California
San Francisco is one of the most densely populated cities in the United States, with a severe housing shortage that has made Accessory Dwelling Units (ADUs) a critical solution for homeowners looking to add living space or generate rental income. The city's unique topography, historic Victorian and Edwardian architecture, and strict local zoning laws make working with experienced ADU contractors in San Francisco absolutely essential. Unlike many other California cities, San Francisco has its own set of layered regulations that go beyond state ADU laws, requiring contractors who are deeply familiar with local codes.
San Francisco ADU Regulations Your Contractor Must Know
San Francisco has embraced ADU development in response to its housing crisis, but the permitting process remains complex. Skilled San Francisco ADU contractors must navigate requirements set by the San Francisco Planning Department and the Department of Building Inspection (DBI). Key regulatory considerations include:
- Unit size limits: Junior ADUs (JADUs) are capped at 500 square feet, while standard ADUs can go up to 1,200 square feet depending on lot size and zoning district.
- Historic preservation rules: Many San Francisco neighborhoods fall under historic district guidelines, meaning exterior modifications must be carefully reviewed to preserve architectural character.
- Soft-story retrofit compliance: Older buildings may require seismic upgrades before or alongside ADU construction, adding complexity and cost.
- Fire and life safety codes: San Francisco enforces strict fire separation and egress requirements, especially in multi-unit buildings.
- Rent control considerations: ADUs built within existing rent-controlled buildings may be subject to the San Francisco Rent Ordinance, which contractors and homeowners must understand before proceeding.
Types of ADUs Commonly Built in San Francisco
Due to the city's dense urban fabric and existing building stock, the most common ADU types built by San Francisco ADU contractors include garage conversions, basement conversions, and internal unit splits. Detached ADUs are less common given the limited lot sizes typical of San Francisco properties. Many homeowners in neighborhoods like the Sunset, Richmond, and Mission Districts are converting underutilized garages or ground-floor spaces into fully permitted rental units.
Why Hiring a Local San Francisco ADU Contractor Matters
Hiring a contractor with proven experience in San Francisco ADU projects can save homeowners significant time and money. Local contractors understand the nuances of working with the DBI, managing neighbor notifications, and coordinating with utility providers like PG&E and SFPUC. They are also familiar with the city's ADU pre-approved plans program, which can accelerate permit timelines considerably.
- Verify the contractor holds a valid California contractor's license (CSLB).
- Ask for references from completed San Francisco ADU projects specifically.
- Confirm they have experience with San Francisco's permit and inspection process.
- Ensure they understand local rent control and zoning implications.
With San Francisco's housing demand showing no signs of slowing, investing in an ADU remains one of the smartest moves a property owner can make. Partnering with a knowledgeable ADU contractor in San Francisco ensures your project is completed efficiently, legally, and to the highest standard.