DouxProcess Directory

Ask for any business in the US.

NAICS 238220 · Plumbing, Heating, and Air-Conditioning Contractors

you asked:

Plumbers in Castro Valley, CA

23 plumbers in Castro Valley, CA. Every listing checked against the issuer's record, in the published order.

  1. B & H Services

    ActiveC36 Plumbing+1

    San Ramon, CA · WC exempt · 6 mi away

    Proof for B & H Services
    License
    CSLB 948487
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    B General Building; C36 Plumbing
    Expires
    Jun 30, 2028
    Checked
    Oct 24, 2026
    Workers' comp
    Exempt: no employees
    Where
    San Ramon, CA · serves California
    Phone
    (925) 833-7110
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  2. Bay Bejar Plumbing

    ActiveC36 Plumbing

    Hayward, CA · WC exempt · 5 mi away

    Proof for Bay Bejar Plumbing
    License
    CSLB 1044477
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing
    Expires
    Sep 30, 2028
    Checked
    Oct 24, 2026
    Workers' comp
    Exempt: no employees
    Where
    Hayward, CA · serves California
    Phone
    (650) 921-2276
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  3. Bay City Boiler Company

    ActiveC4 Boiler, Hot Water Heating and Steam Fitting

    Hayward, CA · WC ✓ · 6 mi away

    Proof for Bay City Boiler Company
    License
    CSLB 320288
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C4 Boiler, Hot Water Heating and Steam Fitting
    Expires
    Aug 31, 2028
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    Hayward, CA · serves California
    Phone
    (510) 786-3711
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  4. Bay Oak Solutions LLC

    ActiveC36 Plumbing

    Oakland, CA · WC exempt · 10 mi away

    Proof for Bay Oak Solutions LLC
    License
    CSLB 1108525
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing
    Expires
    Aug 31, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Exempt: no employees
    Where
    Oakland, CA · serves California
    Phone
    (510) 679-7486
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  5. Bay Wide Plumbing Heating and Air

    ActiveC36 Plumbing+3

    San Leandro, CA · WC ✓ · 5 mi away

    Proof for Bay Wide Plumbing Heating and Air
    License
    CSLB 960675
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    A General Engineering; B General Building; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
    Expires
    May 31, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    San Leandro, CA · serves California
    Phone
    (510) 570-6770
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  6. Bayvalley Mechanical Inc

    ActiveC36 Plumbing+1

    Union City, CA · WC ✓ · 8 mi away

    Proof for Bayvalley Mechanical Inc
    License
    CSLB 1072787
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing; C42 Sanitation System
    Expires
    Jan 31, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    Union City, CA · serves California
    Phone
    (510) 557-8643
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  7. Bayview Plumbing

    ActiveC36 Plumbing

    San Leandro, CA · WC ✓ · 6 mi away

    Proof for Bayview Plumbing
    License
    CSLB 665946
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing
    Expires
    Jul 31, 2028
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    San Leandro, CA · serves California
    Phone
    (510) 551-7900
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  8. Bo's Superior Plumbing Inc

    ActiveC36 Plumbing

    Oakland, CA · WC exempt · 10 mi away

    Proof for Bo's Superior Plumbing Inc
    License
    CSLB 1143778
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing
    Expires
    Sep 30, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Exempt: no employees
    Where
    Oakland, CA · serves California
    Phone
    (510) 519-0601
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  9. Broadway Mechanical-Big Pipe Joint Venture

    ActiveC36 Plumbing+3

    Oakland, CA · WC ✓ · 9 mi away

    Proof for Broadway Mechanical-Big Pipe Joint Venture
    License
    CSLB 1074845
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C4 Boiler, Hot Water Heating and Steam Fitting; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing; C43 Sheet Metal
    Expires
    Apr 30, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    Oakland, CA · serves California
    Phone
    (510) 746-4000
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  10. Broadway Mechanical - Contractors Inc

    ActiveC36 Plumbing+11

    Oakland, CA · WC ✓ · 9 mi away

    Proof for Broadway Mechanical - Contractors Inc
    License
    CSLB 584263
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    A General Engineering; B General Building; C4 Boiler, Hot Water Heating and Steam Fitting; C12 Earthwork and Paving; C16 Fire Protection; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C27 Landscaping; C34 Pipeline; C36 Plumbing; C42 Sanitation System; C43 Sheet Metal; C60 Welding
    Expires
    Jan 31, 2028
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    Oakland, CA · serves California
    Phone
    (510) 746-4000
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  11. Brown 3 Plumbing Company Incorporated

    ActiveC36 Plumbing

    Oakland, CA · WC ✓ · 10 mi away

    Proof for Brown 3 Plumbing Company Incorporated
    License
    CSLB 835216
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing
    Expires
    Oct 31, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    Oakland, CA · serves California
    Phone
    (510) 562-5847
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  12. Buckley Plumbing and Engineering Inc

    ActiveC36 Plumbing+2

    Hayward, CA · WC ✓ · 6 mi away

    Proof for Buckley Plumbing and Engineering Inc
    License
    CSLB 727798
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    A General Engineering; C36 Plumbing; HAZ Hazardous Substance Removal
    Expires
    Jul 31, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    Hayward, CA · serves California
    Phone
    (510) 723-0001
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  13. Bullfrog Plumbing LLC

    ActiveC36 Plumbing

    Oakland, CA · WC exempt · 10 mi away

    Proof for Bullfrog Plumbing LLC
    License
    CSLB 1159936
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing
    Expires
    Aug 31, 2028
    Checked
    Oct 24, 2026
    Workers' comp
    Exempt: no employees
    Where
    Oakland, CA · serves California
    Phone
    (510) 258-1314
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  14. Cal State Pro-Group Inc

    ActiveC36 Plumbing+3

    San Leandro, CA · WC ✓ · 6 mi away

    Proof for Cal State Pro-Group Inc
    License
    CSLB 1128129
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    B General Building; C12 Earthwork and Paving; C29 Masonry; C36 Plumbing
    Expires
    Oct 31, 2026
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    San Leandro, CA · serves California
    Phone
    (510) 780-2221
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  15. Cal-Tech Plumbing Co

    ActiveC36 Plumbing

    Union City, CA · WC ✓ · 8 mi away

    Proof for Cal-Tech Plumbing Co
    License
    CSLB 951321
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing
    Expires
    Aug 31, 2028
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    Union City, CA · serves California
    Phone
    (510) 648-6884
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  16. Calmo's Plumbing & Rooter Inc

    ActiveC36 Plumbing+1

    Oakland, CA · WC ✓ · 7 mi away

    Proof for Calmo's Plumbing & Rooter Inc
    License
    CSLB 1104148
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    A General Engineering; C36 Plumbing
    Expires
    May 31, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    Oakland, CA · serves California
    Phone
    (510) 365-7787
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  17. Calmo's Plumbing & Rooter Inc

    ActivePrivate motor carrier

    Oakland, CA · 7 mi away

    Proof for Calmo's Plumbing & Rooter Inc
    USDOT registration
    US-DOT 3842008
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Oakland, CA · serves California
    Phone
    (510) 365-7787
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record
  18. Capelli Plumbing Inc

    ActiveC36 Plumbing+1

    San Leandro, CA · WC ✓ · 5 mi away

    Proof for Capelli Plumbing Inc
    License
    CSLB 1026755
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing; C42 Sanitation System
    Expires
    May 31, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Workers' comp on file
    Where
    San Leandro, CA · serves California
    Phone
    (510) 969-4358
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  19. Cardona Plumbing

    ActiveC36 Plumbing

    Dublin, CA · WC exempt · 9 mi away

    Proof for Cardona Plumbing
    License
    CSLB 1118377
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing
    Expires
    Mar 31, 2028
    Checked
    Oct 24, 2026
    Workers' comp
    Exempt: no employees
    Where
    Dublin, CA · serves California
    Phone
    (925) 548-8102
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record
  20. Carrillo J Plumbing and Drains

    ActiveC36 Plumbing+1

    Hayward, CA · WC exempt · 5 mi away

    Proof for Carrillo J Plumbing and Drains
    License
    CSLB 938525
    Issuer
    California Contractors State License Board
    Status
    Active
    Class
    C36 Plumbing; C42 Sanitation System
    Expires
    Oct 31, 2027
    Checked
    Oct 24, 2026
    Workers' comp
    Exempt: no employees
    Where
    Hayward, CA · serves California
    Phone
    (510) 688-2597
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → California Contractors State License Board record

More cities in California

Free for people · nobody pays to rank. Run one of these businesses? Claim it free.

Checked facts from public license files · How ranking works