NAICS 237110 · Water and Sewer Line and Related Structures Construction

Well drilling contractors in Castro Valley, CA

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42 listingsHow results are ordered
22

Malcolm/Silverado a Joint Venture

San Francisco, CA · (415) 901-4400

CA-CSLB 1004080 · A ASB +5General engineering contractorAsbestos and hazardous materials abatementGeneral contractor+2
License activechecked Oct 24, 2026
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25

Storesund Construction Inc

Kensington, CA · (510) 526-5849

CA-CSLB 1069275 · A B +1General engineering contractorGeneral contractorWell drilling contractor
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26

Weiss Associates

Berkeley, CA · (510) 450-6165

CA-CSLB 606481 · A C57 +1General engineering contractorWell drilling contractorAsbestos and hazardous materials abatement
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28

Aec Drilling Corp

Milpitas, CA · (408) 458-5305

CA-CSLB 1063911 · C57Well drilling contractor
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29

Clearwater Group

Point Richmond, CA · (510) 307-9943

CA-CSLB 799370 · A ASB +3General engineering contractorAsbestos and hazardous materials abatementGeneral contractor+1
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30

Conetec Inc

Richmond, CA · (510) 357-3677

CA-CSLB 1049248 · C57Well drilling contractor
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31

Drill Tech Drilling & Shoring Inc

Antioch, CA · (925) 978-2060

CA-CSLB 745354 · A C57 +2General engineering contractorWell drilling contractorAsbestos and hazardous materials abatement
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33

Nex Concierge Inc

Milpitas, CA · (650) 353-7784

CA-CSLB 998397 · B C57 +1General contractorWell drilling contractorConcrete contractor
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35

Blaine Tech Services Inc

San Jose, CA · (408) 573-0555

CA-CSLB 746684 · C31 C57General engineering contractorWell drilling contractor
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36

Dirtmarket LLC

San Jose, CA · (408) 262-1418

CA-CSLB 1052786 · A C57General engineering contractorWell drilling contractor
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37

Environmental Testing

San Jose, CA · (408) 712-9452

CA-CSLB 716002 · A C57 +1General engineering contractorWell drilling contractorAsbestos and hazardous materials abatement
License activechecked Oct 24, 2026
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