Number 1: Decor Builders
on GoogleSan Jose, CA
Decor Builders is an ADU builder based in San Jose, California.
(408) 389-4620 800 Charcot Ave #102, San Jose, CA 95131
ADU builders in San Francisco
The 10 ADU builders from Google's results for San Francisco, California, ordered by Google rating weighted by review count. No firm pays to be listed or ranked.
Last updated
- Garage conversion ADU
- $79,000 – $198,000existing structure
- Detached ADU
- $198,000 – $528,000new build, utilities
- Prefab ADU
- $158,500 – $396,000unit, foundation, install
- San Francisco vs US
- +32%well above the US median
Licensing in California. California contractors need a CSLB license for most remodeling work. Check the license number and its bond on the CSLB site before you sign.
Number 2: ADU Builders in the Bay Area
on GoogleSunnyvale, CA
Waves Remodeling is a family-run design-build firm in Sunnyvale building ADUs throughout the Bay Area. One contract covers design, city permits and construction of detached units, converted garages, attached additions and JADUs, and clients see a rendering of the finished unit before materials are ordered.
(408) 539-1094 710 Lakeway Dr #200, Sunnyvale, CA 94085
Number 3: San Francisco ADU
on GoogleSan Francisco, CA
Alpha ADU Solutions works with homeowners on accessory dwelling unit projects in San Francisco, California.
(415) 749-9958 967 Connecticut St, San Francisco, CA 94107
Number 4: Licensed ADU Contractor & Custom ADU Builder
on GoogleSan Francisco
Metricon Homes is a turnkey design-build team constructing ADUs in all nine Bay Area counties from San Francisco. It handles feasibility, foundations, permits and utility tie-ins, building steel-frame detached backyard homes, attached additions and garage conversions.
Number 5: Anura Design
on GooglePleasant Hill, CA
Anura Design & Remodel is an ADU builder based in Pleasant Hill, California.
(510) 612-0345 367 Civic Dr #3, Pleasant Hill, CA 94523
Number 6: AKD Homes
San Francisco
AKD Homes is a San Francisco design-build company handling general construction and accessory dwelling units across the Bay Area. In-house designers and construction crews take ADU projects from initial design to completion, whether for added living space, rental income or family members.
Number 7: ADU Builders Bay Area
San Francisco
ADU Builders Bay Area is an ADU builder in San Francisco, California.
Number 8: ADU Crew
San Francisco
ADU Crew sells prefab accessory dwelling units and installs them across California, including the San Francisco area. Its team takes each backyard unit through design, permitting and on-site installation, with one-, two- and three-bedroom models that can be configured with exterior options and interior upgrades.
Number 9: Hamilton Exteriors
San Francisco
Hamilton Exteriors builds accessory dwelling units in San Francisco.
Number 10: ADU Construction Services
San Francisco
Handyman Heroes builds custom accessory dwelling units around the San Francisco Bay Area, with projects in San Francisco, Marin County, Mill Valley, Oakland, Berkeley and Palo Alto. The units serve as space for family members and guests or as rental housing.
What ADU builders charge in San Francisco
In San Francisco, a garage conversion ADU typically costs $79,000 – $198,000. Remodeling labor in San Francisco runs about 32% above the US median, which accounts for most of the difference from the same project elsewhere.
How to choose between them
- Check the license yourself. Where California or San Francisco licenses this work, the licensing board's own lookup confirms a license number in a minute. Do it before you sign, not after.
- Get three bids on the same scope. Written down, split into labor, materials, allowances and anything structural. Most people compare a total against a total and end up choosing between two different projects.
- Ask what is not included. Permits, debris removal, fixture and finish allowances, and repairs after demolition are the four that turn a cheap bid into an average one.
- Never pay a large deposit up front. A deposit to order materials and hold a start date is normal. Half the total before anyone shows up is not.
How this list is ordered
These are the firms from Google's results for "adu builders san francisco", with directories, chains and suppliers removed. They are ordered by Google rating weighted by review count, and the ratings shown are Google's. No firm pays to be listed or ranked. The list was last updated in October 2026.
ADU builders in San Francisco: common questions
Can I build an ADU on my lot?
It depends on your city and state. California, Oregon and Washington have state laws that make ADUs allowed on most single-family lots. Elsewhere it is set by local zoning, so check lot size, setback and owner-occupancy rules with your city first.