Licensed Contractors in Castro Valley, California

Castro Valley has 425 licensed contractors registered with the California Contractors State License Board across 48 trade classifications. The most common specialties are Electrical Contractor (50), Painting and Decorating Contractor (37), Landscaping Contractor (24). 262 contractors hold general contractor licenses (Class A or B).

All license data is sourced from the California Contractors State License Board (CSLB). Last data update: April 05, 2026.

Contractors by Trade

Building (274)
Painting (61)
Electrical (54)
Plumbing (28)
Landscaping (24)
Limited (23)
Roofing (18)
HVAC (16)
Earthwork (12)
Fire (9)
Welding (5)
Solar (3)
H James Knuppe Active
License #214462 B Castro Valley, CA Est. 1963
Frank Bonetti Plumbing Inc Active
License #251165 C-4, C-20 +3 more Castro Valley, CA Est. 1967
Paragon Electric Active
License #261291 B, C-10 Castro Valley, CA Est. 1970
Northup Construction Inc Active
License #265315 B Castro Valley, CA Est. 1970
John J Langon Jr Active
License #283657 B, C-33 Castro Valley, CA Est. 1973
Battinich Tree & Landscape Specialists Active
License #359287 C-27 Castro Valley, CA Est. 1978
Interior Systems Drywall Active
License #361934 C-9 Castro Valley, CA Est. 1978
Edwin T Croll Active
License #368028 B, C-10 Castro Valley, CA Est. 1979
Jack D Olson Design & Construction Co Active
License #374770 B, C-12 Castro Valley, CA Est. 1979
Two Brothers Roofing Inc Active
License #378564 C-39 Castro Valley, CA Est. 1979
Layne Electrical Ent Active
License #380217 C-10 Castro Valley, CA Est. 1979
Plants Unlimited Inc Active
License #393699 C-27 Castro Valley, CA Est. 1980
Reed'S Craftmanship Active
License #394444 B, C-6 +1 more Castro Valley, CA Est. 1980
Owen Active
License #395410 A, B +1 more Castro Valley, CA Est. 1980
M W C & Associates Active
License #398440 B Castro Valley, CA Est. 1981
Demiguel Plumbing Active
License #406575 C-16, C-36 Castro Valley, CA Est. 1981
John Mc Donagh Builders And Energy Systems Active
License #422946 B, C-4 +7 more Castro Valley, CA Est. 1982
Ken A Rose Active
License #423722 B Castro Valley, CA Est. 1982
Direct Sales Floors Active
License #424404 B, C-15 Castro Valley, CA Est. 1982
Preston Landscaping Active
License #430861 C-27 Castro Valley, CA Est. 1982
Hansen Landscape Contractors Inc Active
License #440372 C-27 Castro Valley, CA Est. 1983
Steven L Phillips Construction Inc Dba Phillips Construction Active
License #442048 A, B Castro Valley, CA Est. 1983
Pete Radovich Construction Active
License #449887 B Castro Valley, CA Est. 1983
West Coast Overhead Door Company Active
License #453839 D28 Castro Valley, CA Est. 1984
Harvey Electric Active
License #457858 C-10 Castro Valley, CA Est. 1984
M B R Active
License #457961 B Castro Valley, CA Est. 1984
Merkouris Construction Inc Active
License #464532 B, C-10 +1 more Castro Valley, CA Est. 1984
Bar In The Woods Construction Active
License #469701 B Castro Valley, CA Est. 1985
Mardigras Electric Co Active
License #504106 C-10 Castro Valley, CA Est. 1987
Donahue Backhoe & Construction Co Active
License #504109 B Castro Valley, CA Est. 1987
Kelly Huska Contracting Active
License #506830 B, C-33 Castro Valley, CA Est. 1987
Stanley Sound Active
License #508687 C-7, C-10 Castro Valley, CA Est. 1987
R J H Construction Active
License #517983 B Castro Valley, CA Est. 1987
S R Blackstone Construction Inc Active
License #520142 B Castro Valley, CA Est. 1987
Cliff Olson Construction Active
License #529277 B Castro Valley, CA Est. 1988
Silva James P Construction Inc Active
License #530036 B Castro Valley, CA Est. 1988
Syufy Builders Active
License #530377 B Castro Valley, CA Est. 1988
John Jensen Active
License #547028 B, C-15 Castro Valley, CA Est. 1988
Bailey Roofing Active
License #549062 C-39 Castro Valley, CA Est. 1988
Ralph J Nice Active
License #549951 B Castro Valley, CA Est. 1988
Chi Construction Company Active
License #552583 B Castro Valley, CA Est. 1989
Gil Garcia General Contractor Active
License #552748 B Castro Valley, CA Est. 1989
Mark Dobel Painting & Restoration Active
License #556547 C-33 Castro Valley, CA Est. 1989
Complete Const Co Active
License #557164 B Castro Valley, CA Est. 1989
Amtech Inc Active
License #560006 B, C-20 +3 more Castro Valley, CA Est. 1989
Elias Lambros Plumbing Active
License #561709 C-36 Castro Valley, CA Est. 1989
E & S Masonry Corporation Active
License #562066 C-29 Castro Valley, CA Est. 1989
Alameda Engineering Active
License #562641 A Castro Valley, CA Est. 1989
Slb Construction Inc Active
License #575742 B Castro Valley, CA Est. 1989
Value Painting Active
License #590578 C-33 Castro Valley, CA Est. 1990

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Licensing Resources

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Deposit and payment rules for California contracts
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