Licensed ADU builders in the Bay Area

24 builders with an active California contractor license, checked on CSLB on Oct 18, 2026. The order comes from a public score; nobody pays to move up. How we rank

Building in Cupertino? Compare ADU builders in Cupertino by project type, then use the local permit and quote checklist before you hire.

For a Mountain View project, compare ADU remodeling and new construction in Mountain View, then filter builders by the work you need.

1. IH

   1

   IMKAT Homes (Imkat Construction)

   Based in Pleasanton, Alameda County

   CSLB #1094866 active Class B Licensed 4 years

   • Detached
   • Attached
   • Garage conversion
   • Ready-made plans

   • No public complaints on its CSLB record
   • Its price: $125,000 to $300,000+ (up to $415,000 in San Jose)

   82 of 95 points

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2. AA

   2

   Acton ADU

   Based in Campbell, Santa Clara County

   CSLB #638333 active Class B Licensed 34 years

   • Detached
   • Ready-made plans

   • No public complaints on its CSLB record
   • Publishes general price ranges

   81 of 95 points

   Request quote Profile
3. VH

   3

   Valley Home Builders

   Based in Santa Clara, Santa Clara County

   CSLB #889458 active Class B Licensed 19 years

   • Detached
   • Ready-made plans

   • No public complaints on its CSLB record
   • Publishes general price ranges

   81 of 95 points

   Request quote Profile
4. AB

   4

   ADU Builders Group

   Based in Los Gatos, Santa Clara County

   CSLB #1126603 active Class B Licensed 2 years

   • Detached
   • Attached
   • Garage conversion
   • Junior ADU

   • No public complaints on its CSLB record
   • Publishes general price ranges

   77 of 95 points

   Request quote Profile
5. N

   5

   Nestadu

   Based in Mill Valley, Marin County

   CSLB #1117837 active Class B Licensed 2 years

   • Detached
   • Prefab

   • No public complaints on its CSLB record
   • Its price: From $115,000 for a 200 sq ft studio

   76 of 95 points

   Request quote Profile
6. RS

   6

   Red Shed Studio

   Based in San Jose, Santa Clara County

   CSLB #1137392 active Class B Licensed 1 year

   • Detached
   • Attached
   • Garage conversion
   • Junior ADU

   • No public complaints on its CSLB record
   • Its price: $120,000 to $180,000

   74 of 95 points

   Request quote Profile
7. 9

   7

   9Builders

   Based in San Jose, Santa Clara County

   CSLB #1132916 active Class B Licensed 1 year

   • Detached
   • Attached
   • Garage conversion
   • Junior ADU
   • Ready-made plans

   • No public complaints on its CSLB record
   • Publishes general price ranges

   72 of 95 points

   Request quote Profile
8. S

   8

   Samara (Samara Backyard)

   Based in Redwood City, San Mateo County

   CSLB #1102654 active Class B Licensed 3 years

   • Detached
   • Prefab
   • Ready-made plans

   • No public complaints on its CSLB record
   • Its price: From $152,000 plus installation

   71 of 95 points

   Request quote Profile
9. RB

   9

   Rhino Builders

   Based in Lafayette, Contra Costa County

   CSLB #580756 active Class B Licensed 36 years

   • Detached
   • Garage conversion
   • Junior ADU

   • No public complaints on its CSLB record
   • Publishes general price ranges

   69 of 95 points

   Request quote Profile
10. RB

    10

    Rock Bay Construction & Remodeling

    Based in Redwood City, San Mateo County

    CSLB #1119693 active Class B Licensed 2 years

    • Detached
    • Attached
    • Garage conversion

    • No public complaints on its CSLB record
    • No prices published

    69 of 95 points

    Request quote Profile
11. 11

    VitalizeBuild Construction

    Based in Santa Clara, Santa Clara County

    CSLB #1104475 active Class B Licensed 3 years

    • Detached
    • Garage conversion
    • Ready-made plans

    • No public complaints on its CSLB record
    • No prices published

    69 of 95 points

    Request quote Profile
12. AR

    12

    ASL Remodeling - Design & Build

    Based in Los Gatos, Santa Clara County

    CSLB #1060310 active Class B Licensed 6 years

    • Detached
    • Attached
    • Garage conversion

    • No public complaints on its CSLB record
    • No prices published

    68 of 95 points

    Request quote Profile
13. 13

    The ADU Dudes

    Based in Livermore, Alameda County

    CSLB #1081083 active Class B Licensed 5 years

    • Detached
    • Junior ADU
    • Ready-made plans

    • No public complaints on its CSLB record
    • Its price: From $159,000 for a 400 sq ft studio

    68 of 95 points

    Request quote Profile
14. A

    14

    Abodu

    Based in Beverly Hills, outside the Bay Area

    CSLB #1160077 active Class B Licensed under a year

    • Detached
    • Prefab
    • Ready-made plans

    • No public complaints on its CSLB record
    • Its price: All-in from $298,800 for 385 sq ft

    63 of 95 points

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15. GB

    15

    Green Bay Remodeling

    Based in Concord, Contra Costa County

    CSLB #993580 active Class B Licensed 12 years

    • Detached
    • Garage conversion

    • CSLB lists a complaint disclosure
    • No prices published

    63 of 95 points

    Request quote Profile
16. DH

    16

    D&D Home Remodeling

    Based in San Jose, Santa Clara County

    CSLB #1128719 active Class B Licensed 1 year

    • Detached
    • Attached
    • Garage conversion

    • No public complaints on its CSLB record
    • Publishes general price ranges

    61 of 95 points

    Request quote Profile
17. 17

    FabuHome

    Based in Santa Clara, Santa Clara County

    CSLB #1133829 active Class B Licensed 1 year

    • Detached
    • Attached
    • Garage conversion

    • No public complaints on its CSLB record
    • No prices published

    61 of 95 points

    Request quote Profile
18. GV

    18

    Golden View Renovation

    Based in San Jose, Santa Clara County

    CSLB #1072628 active Class B Licensed 5 years

    • Junior ADU

    • No public complaints on its CSLB record
    • No prices published

    57 of 95 points

    Request quote Profile
19. MC

    19

    May Construction

    Based in San Jose, Santa Clara County

    CSLB #524952 active Class B, C33 Licensed 38 years

    • Detached
    • Garage conversion

    • No public complaints on its CSLB record
    • No prices published

    56 of 95 points

    Request quote Profile
20. MA

    20

    McDunn ADUs

    Based in Berkeley, Alameda County

    CSLB #966969 active Class B Licensed 15 years

    • No public complaints on its CSLB record
    • No prices published

    50 of 95 points

    Request quote Profile
21. S

    21

    SFBayADU (SF Bay ADU)

    Based in San Jose, Santa Clara County

    CSLB #1023342 active Class B Licensed 9 years

    • Detached
    • Garage conversion
    • Ready-made plans

    • CSLB lists a complaint disclosure
    • No prices published

    48 of 95 points

    Request quote Profile
22. TF

    22

    Type Five

    Based in Berkeley, Alameda County

    CSLB #1086540 active Class B Licensed 4 years

    • Detached

    • No public complaints on its CSLB record
    • No prices published

    48 of 95 points

    Request quote Profile
23. 23

    Villa

    Based in San Francisco, San Francisco County

    CSLB #1077688 active Class B Licensed 5 years

    • Prefab

    • No public complaints on its CSLB record
    • No prices published

    47 of 95 points

    Request quote Profile
24. SS

    24

    Studio Shed / Studio Home

    Based in Colorado, outside the Bay Area

    CSLB #1089992 active Class B Licensed 4 years

    • Detached
    • Prefab

    • No public complaints on its CSLB record
    • Publishes general price ranges

    46 of 95 points

    Request quote Profile