California › Los Angeles County › Plumbing › Walnut
Licensed plumbers in Walnut
19 contractors with a Walnut 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.
FeaturedAds · paid placement
Ad space · openAdvertise here
A Featured spot on this plumbing page for Walnut 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 Walnut 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 19 licensed plumbersOrder: A–Z by business name (neutral, stated). Showing 1–19.
A DRAIN DOCTOR
C-36 · Lic. #803591 · Walnut 91789
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BRUCE'S PLUMBING SERVICE
C-36 · Lic. #904642 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CHRISTOPHER BONILLA
C-36 · Lic. #1002675 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DAVID LI
C-36 · Lic. #1111958 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DONG TSAIR HWANG
C-36 · also C-10 · Lic. #697328 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
EXPERT HVAC SERVICE INC
C-36 · also B, C-20, C-46 · Lic. #1115612 · Walnut 91789
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
G PHILLIPS PLUMBING
C-36 · Lic. #526195 · Walnut 91788
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
JOHN THE PLUMBER
C-36 · Lic. #669082 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
KP PLUMBING INC
C-36 · Lic. #1044093 · Walnut 91789
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
LA HABRA FIRE PROTECTION AND PLUMBING
C-36 · also C-16 · Lic. #757985 · Walnut 91788
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
MAXIMUM MECHANICAL PLUMBING
C-36 · Lic. #1051536 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
MAXIMUS BUILDERS INC
C-36 · also B · Lic. #1000594 · Walnut 91789
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
MICHAEL JOELLSON
C-36 · Lic. #957335 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
MTEC
C-36 · also B, C-33 · Lic. #873492 · Walnut 91789
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
PEACECAL PLUMBING
C-36 · Lic. #1144632 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
POMONA VALLEY PLUMBING HEATING AIR CONDITIONING CO INC
C-36 · also C-20 · Lic. #1019549 · Walnut 91789
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SCOTT CHIEN
C-36 · also B, C-10, C-16 · Lic. #1089712 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
UNITED RIGGERS & ERECTORS INC
C-36 · also A, B, C-8, C-51… · Lic. #245451 · Walnut 91789
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
WALNUT PLUMBING
C-36 · Lic. #1005582 · Walnut 91789
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026