California › Alameda County › Plumbing › Castro Valley
Licensed plumbers in Castro Valley
23 contractors with a Castro Valley mailing address hold an active (CLEAR) CSLB C-36 Plumbing license in CSLB's license file dated Oct 20, 2026. Get quotes from up to 3 of them →
Plumbing work calls for a C-36 Plumbing license. A B general builder can do plumbing only as part of a larger job with other unrelated trades, unless they also hold a C-36.
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A Featured spot on this plumbing page for Castro Valley is a paid ad for a License Verified contractor, labeled "Ad" every time. It sits apart from the directory and never changes the order below. From $49/mo. Join the waitlist →
All 23 licensed plumbers
Order: A–Z by business name (neutral, stated). Showing 1–23. AAA PLUMBING & REMODELING INC
C-36 · also A, B, C-42 · Lic. #1052769 · Castro Valley 94552
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ALL FIXTURE PLUMBING
C-36 · Lic. #774779 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ALLIGATOR PLUMBING INC
C-36 · Lic. #995431 · Castro Valley 94546
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BAEK CONSTRUCTION
C-36 · also B · Lic. #1002450 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
BLU PIPE PLUMBING LLC
C-36 · Lic. #1132566 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
BLUEWAVE PLUMBING AND WATER HEATERS LLC
C-36 · Lic. #1151565 · Castro Valley 94552
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
BRI-CARR PLUMBING
C-36 · Lic. #658310 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
BUCHMANN INC
C-36 · also A, B, C-10, C-46 · Lic. #1004484 · Castro Valley 94546
Workers' comp: via leasing/temp firm
✓License Verified CSLB file · Oct 20, 2026
CLEARWATER PLUMBING
C-36 · Lic. #872069 · Castro Valley 94562
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DEMIGUEL PLUMBING
C-36 · also C-16 · Lic. #406575 · Castro Valley 94546
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ELIAS LAMBROS PLUMBING
C-36 · Lic. #561709 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
FRANK BONETTI PLUMBING INC
C-36 · also C-4, C-20, C-34, C-42 · Lic. #251165 · Castro Valley 94546
Workers' comp: via leasing/temp firm
✓License Verified CSLB file · Oct 20, 2026
GAXL GENERAL CONSTRUCTION INC
C-36 · also B · Lic. #1037436 · Castro Valley 94546
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
HARRIS WATER HEATERS INC
C-36 · Lic. #1026214 · Castro Valley 94552
Workers' comp: via leasing/temp firm
✓License Verified CSLB file · Oct 20, 2026
HOUSTON PLUMBING
C-36 · Lic. #960208 · Castro Valley 94546
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
JOHN MC DONAGH BUILDERS AND ENERGY SYSTEMS
C-36 · also B, C-4, C-10, C-27… · Lic. #422946 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
JUST PLUMBING INC
C-36 · Lic. #909971 · Castro Valley 94546
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
OLGA GARIBAY PLUMBING
C-36 · Lic. #1139028 · Castro Valley 94603
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
PATRICK MC CARTHY
C-36 · Lic. #806963 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
PROPER PLUMBING SERVICES LLC
C-36 · Lic. #1100951 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
STREAMLINE PLUMBING & DRAIN CO
C-36 · also A, C-42 · Lic. #672250 · Castro Valley 94546
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
WATER HEATER COMPANY
C-36 · also B · Lic. #987574 · Castro Valley 94552
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
WONG PLUMBING
C-36 · Lic. #1158954 · Castro Valley 94546
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026