ADU Contractors near San Francisco, CA
CityPaks
San Francisco, CA 95130
3 miles
CityPaks is a minority & woman-owned ADU builder in the San Francisco Bay Area specializing in affordable, sustainable backyard cottages & detached ADUs using SIP panels. No crane needed, no sales tax, pre-approved in San Jose.
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Adapt Dwellings
5944 Claremont Avenue, Oakland, CA 94618
12.2 miles
ADUs add rental income & property value. Services include garage conversions, detached ADUs, JADUs & granny flats. ADU Feasibility Studies cover code, utilities & ROI. Architectural services via Adapt Dwellings ensure smooth approval to construction.
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ASL Remodeling
690 Saratoga Avenue, San Jose, CA 95129
39.7 miles
ASL Remodeling is a California licensed ADU contractor (CSLB #1060310) with 20+ years experience and 300+ completed projects. Services include detached ADUs, garage conversions, granny flats, JADUs, and in-law suites with full design-build support.
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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.
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Edri Construction, Inc. Mill Valley
1 Belvedere Pl, Mill Valley, CA 94941
11.9 miles
Edri Construction, Inc. is a Mill Valley-based Bay Area ADU contractor offering full-service accessory dwelling unit construction, including garage conversions, detached ADUs, JADUs, and in-law suites, with permit handling and energy-efficient building.
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New Key Construction
2890 North Main Street, Walnut Creek, CA 94597
24 miles
Northbay Home Solutions
47 Paul Drive, San Rafael, CA 94903
14.7 miles
Northbay Home Solutions offers full-service ADU construction in San Rafael, San Francisco & North Bay. Services include detached ADUs, garage conversions & JADUs, covering design, permits & build.
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Bobcat Builders
East Palo Alto, CA 94303
25.7 miles
Bobcat Builders is a Bay Area ADU contractor specializing in accessory dwelling units in Palo Alto. They offer attached & detached ADUs, garage conversions, granny flats & in-law suites, backed by a Two Year Satisfaction Guarantee.
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Green Living Builders, LLC
833 Bancroft Way, Berkeley, CA 94710
11 miles
Green Living Builders LLC is a licensed, bonded Berkeley CA general contractor specializing in ADU construction, garage conversions, home remodels, and new builds across the East Bay. Diamond Certified with deep local expertise.
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Mission Home Remodeling
475 Gough Street, San Francisco, CA 94102
1.9 miles
Masterful Construction
3 3rd Avenue, San Mateo, CA 94401
14.6 miles
Masterful Construction is a San Mateo ADU contractor serving the Bay Area. They build detached ADUs, garage conversions, and in-law suites, handling design, permits, and construction. Discounts available for military and first responders.
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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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Urban Shore Builders
226 Delfino Avenue, Point Richmond, CA 94801
12.3 miles
Urban Shore Builders offers full-service ADU design & construction, including garage conversions, detached units & additions. As a turnkey ADU contractor, they handle permits, design & build. Services include plumbing, electrical, HVAC & retaining walls.
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Metricon Homes
2010 Crow Canyon Road, Suite 100, San Ramon, CA 94583
25.8 miles
Metricon Homes offers ADU construction and garage conversion services. Choose from 5 sizes: Marigold, Camellia, Magnolia, Dahlia, and Sunflower. Their Design to Doorstep process covers custom design to completion. Licensed contractor: Tobin Brinker, License #1128717.
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OT Bay Builders
1580 Oakland Road, San Jose, CA 95131
39.8 miles
OT Bay Builders is a complete remodeling company with over 40 years of combined experience amongst our team. We’re expert Bay Area ADU builders in San Jose with a customer-first mindset. As a full-service ADU builder, you can trust us to remain by your side from the first consultation to the final walkthrough.
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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.