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ADU builders in San Francisco

35 licensed contractors, the ones with the most accessory dwelling unit (ADU) jobs first. City permits, September 2021 to September 2026. See what ADUs cost and how long they take.

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RankContractorLicenseJobsTypical jobMost work inContact
1Reliable Construction Inc
San Francisco, licensed 13 years
2 jobs since October 2025
Active
11
$35,00094124, 94122Get a quoteVisit website
2Doherty Restoration, Inc.
San Francisco, licensed 33 years
Active
9
$84,00094124, 94115Get a quoteVisit website
3S L M Development Inc.
Redwood City, licensed 22 years
Active
8
$180,00094114, 94123Get a quoteVisit website
4Block 12 Construction
San Francisco, licensed 9 years
Active
5
$150,00094117, 94115Get a quoteVisit website
5Maxg Construction Inc (maxwell M Ghobadi
San Francisco, licensed 5 years
5 of 8 jobs are ADUs
Active
5
$200,00094112, 94124Get a quoteVisit website
6O Donoghue Construction Inc.
San Francisco, licensed 18 years
2 jobs since October 2025
Active
5
$400,00094122, 94131Get a quoteCall (415) 850-2194
7R Group, Inc
San Francisco, licensed 22 years
All 5 jobs are ADUs, 5 since October 2025
Active
5
$8,00094124, 94110Get a quoteCall (415) 550-9551
8Wynn L Builders Inc.
San Francisco, licensed 5 years
Active
5
$150,00094116, 94132Get a quoteCall (415) 812-6691
9Associated Builders
San Francisco, licensed 28 years
Active
4
$65,00094124, 94117Get a quoteCall (415) 285-6200
10Bay C T Construction Inc.
San Francisco, licensed 18 years
2 jobs since October 2025
Active
4
$48,00094116, 94133Get a quoteCall (415) 308-2838
11L H Construction
San Francisco, licensed 27 years
1 job since October 2025
Active
4
$118,84894115Get a quoteCall (415) 563-5563
12Wickman Development and Construction
San Francisco, licensed 14 years
Active
4
$89,35094108, 94109Get a quoteCall (415) 239-4500
13Winder Construction Inc.
San Francisco, licensed 9 years
3 jobs since October 2025
Active
4
$125,00094121, 94110Get a quoteCall (415) 823-0599
14Ace Drilling & Excavation
San Francisco, licensed 19 years
Active
3
$10,00094110Get a quoteCall (415) 730-6918
15Area Development Inc.
San Mateo, licensed 40 years
2 jobs since October 2025
Active
3
$150,00094112, 94124Get a quoteCall (415) 992-1002
16Axel8 Construction
San Francisco, licensed 8 years
Active
3
$101,50094121, 94109Get a quoteCall (415) 531-5998
17Cabrillo Construction Co. Inc.
Millbrae, licensed 24 years
1 job since October 2025
Active
3
$1,200,00094112Get a quoteCall (415) 810-2408
18Cbs Construction Inc.
San Francisco, licensed 16 years
Active
3
$65,00094124, 94103Get a quoteCall (415) 282-1888
19Cht Properties Development
San Francisco, licensed 24 years
Active
3
$20,00094124, 94116Get a quoteCall (415) 225-8086
20Construction Unlimited
San Mateo, licensed 36 years
Active
3
$150,00094134Get a quoteCall (650) 678-7444
21Custom Construction Enterprises
San Francisco, licensed 23 years
1 job since October 2025
Active
3
$400,00094117, 94118Get a quoteCall (415) 312-9827
22D3 Construction
San Francisco, licensed 33 years
Active
3
$79,73094122, 94127Get a quoteCall (415) 626-8300
23De Brus Construction Inc
San Francisco, licensed 11 years
1 job since October 2025
Active
3
$100,00094116, 94109Get a quoteCall (415) 410-1833
24Golden State Marble and Construction Inc
San Mateo, licensed 2 years
1 job since October 2025
Active
3
$100,00094115, 94112Get a quoteCall (650) 342-3318
25H D Construction Company
San Francisco, licensed 11 years
Active
3
$115,00094116, 94133Get a quoteCall (209) 323-9990
26Hang C Construction Inc
San Francisco, licensed 27 years
Active
3
$133,00094112, 94109Get a quoteCall (415) 623-9257
27Hong's General Construction Inc
San Francisco, licensed 12 years
1 job since October 2025
Active
3
$80,00094116, 94131Get a quoteCall (415) 308-6373
28L E C A Construction Llc
San Mateo, licensed 14 years
Active
3
$150,00094109, 94122Get a quoteCall (650) 595-2106
29Perez Construction Llc.
San Francisco, licensed 9 years
1 job since October 2025
Active
3
$150,00094114, 94133Get a quoteVisit website
30Rohan Wallace & Aherne Inc
San Francisco, licensed 27 years
Active
3
$100,00094118, 94114Get a quoteCall (415) 740-4748
31Sandbank Construction, Inc
Novato, licensed 19 years
Active
3
$210,00094108, 94115Get a quoteCall (415) 595-8611
32Synerforce Construction
Union City, licensed 11 years
Active
3
$60,00094116, 94122Get a quoteCall (415) 795-3234
33The Toboni Group
San Francisco, licensed 27 years
1 job since October 2025
Active
3
$900,00094127, 94131Get a quoteCall (415) 359-9842
34Wing On Construction Inc
San Leandro, licensed 16 years
Active
3
$70,00094134Get a quoteVisit website
35Yefa Construction Inc
San Francisco, licensed 8 years
Active
3
$50,00094112, 94114Get a quoteCall (415) 882-6425

Only contractors with a license in good standing on Sep 23, 2026 are ranked; 5 more have the jobs on record but no active license. Typical job is the middle job value written on their permits, which can differ from the final price.

Get quotes from up to 3 licensed ADU builders

Five quick questions. We send your request to up to 3 contractors who work near you, and email you who they are.

You decide who to hire. Your details go only to the contractors you pick. How we use your details

1. Where is the job?

We match contractors who work near it. We never ask for your street address.

2. What do you need?

Pick any that fit.

3. When do you want to start?
4. What is your rough budget?

A range is fine. It helps contractors reply with a real number.

5. Where should we send it?

Your contact details go only to who you pick here.

Sent. We have your request.

Over the next few days we email you up to 3 contractors who fit, and pass your request to them. Replies usually come within a few days.

Your job room keeps the request, your photos and every reply in one place, with an assistant that checks prices against city permits. Keep its link: it is the key to your job.

Open your job room

Paying for your ADU

Three common ways. Compare the total you will repay, not the monthly payment.

  • Home equity line of creditBorrow against what your home is worth. Rates are usually lower, but your home secures the loan, and approval takes a few weeks.
  • Personal loanNo collateral and a fast answer. Rates are usually higher and you repay sooner.
  • Contractor financingMany contractors offer a plan through a lender. Get the rate, fees and total cost in writing, then compare it with your bank.