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Licensed plumbers in Diamond Bar
27 contractors with a Diamond Bar 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 Diamond Bar 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 →
Ad space · openAdvertise here
A Featured spot on this plumbing page for Diamond Bar 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 27 licensed plumbers
Order: A–Z by business name (neutral, stated). Showing 1–27. A E D CONTRACTORS
C-36 · also A, B, C-10 · Lic. #441036 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ACE PLUMBING CO
C-36 · also B · Lic. #785570 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ADVANCED TANKLESS AND PLUMBING
C-36 · Lic. #1121827 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ALL DAY DRAINS
C-36 · Lic. #1088634 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
AVEO INC
C-36 · also A, B, C-10, C-20 · Lic. #969881 · Diamond Bar 91765
Workers' comp policy on file
Active — CSLB flag: workers' comp suspension pending
C - THIRTY - SIX INC
C-36 · also B · Lic. #739644 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
C S D M INC DBA CAL STEAM COMPANY
C-36 · also C-4, C-20 · Lic. #674646 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CANY FIRE PROTECTION INC
C-36 · also C-16 · Lic. #1142986 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ELITE PIPE P
C-36 · Lic. #1144688 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
EXPEDITE PLUMBING
C-36 · Lic. #939646 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
G C PLUMBING
C-36 · Lic. #681446 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
GALVAN PLUMBING
C-36 · Lic. #1065435 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
HSUEH YU LIAO
C-36 · also B, C-10 · Lic. #769733 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
J H PLUMBING
C-36 · Lic. #876263 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
JAY'S PLUMBING
C-36 · Lic. #622850 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
JH BUILDER AND REMODELING INC
C-36 · also B, C-16 · Lic. #751479 · Diamond Bar 91765
Workers' comp policy on file
Active — CSLB flag: workers' comp suspension pending
JONES PLUMBING
C-36 · Lic. #917266 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
KENNETH DALEY HEATING & AIR SERVICES
C-36 · also C-20 · Lic. #798187 · Diamond Bar 91765
Workers' comp policy on file
Active — CSLB flag: workers' comp suspension pending
MICHAEL STEVEN FEDOROW
C-36 · also B · Lic. #652125 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
MING CHU CHEN CHIEN
C-36 · also B, C-10 · Lic. #820540 · Diamond Bar 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
MIRAE CONSTRUCTION CO
C-36 · also A, B · Lic. #876472 · Diamond Bar 91789
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
MONAIR CONTRACTORS
C-36 · also B, C-10 · Lic. #677543 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
SERVICE WIZARDS
C-36 · also C-20, C-42 · Lic. #797071 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
THLC CORPORATION
C-36 · also B, C-10, C-20, C-38 · Lic. #1077041 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
TODD CLARK DBA ROOTER SHOOTER
C-36 · also B, C-42 · Lic. #800418 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
VANGUARD PLUMBING
C-36 · Lic. #1161936 · Diamond Bar 91765
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ZIP RENOVATION & AIR
C-36 · also B, C-10, C-15, C-20 · Lic. #762505 · Diamond Bar 91765
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026