Plumbing contractors in WALNUT, CA
21 listingsSource: California CSLB license records. Last verified 2026-08-31.
There are 21 plumbing contractors in WALNUT, California with a current state license as of 2026-08-31. The earliest license expiry among them is 2026-10-31; every listing shows its own number and expiry date. All are drawn from the California CSLB register; expired and inactive licenses are excluded.
| Business | License | Type | Expires | City | Zip | |
|---|---|---|---|---|---|---|
| A DRAIN DOCTOR | 803591 | C-36 | 2028-01-31 | WALNUT | 91789 | Set up workspace |
| BRUCE'S PLUMBING SERVICE | 904642 | C-36 | 2027-10-31 | WALNUT | 91789 | Set up workspace |
| CHRISTOPHER BONILLA | 1002675 | C-36 | 2027-04-30 | WALNUT | 91789 | Set up workspace |
| DAVID LI | 1111958 | C-36 | 2027-10-31 | WALNUT | 91789 | Set up workspace |
| DONG TSAIR HWANG | 697328 | C-10, C-36 | 2026-10-31 | WALNUT | 91789 | Set up workspace |
| EXPERT HVAC SERVICE INC | 1115612 | B, C-20, C-36, C-46 | 2028-01-31 | WALNUT | 91789 | Set up workspace |
| GABRIEL FRAUSTO UNDERGROUND CONSTRUCTION INC | 1040416 | A, C-42 | 2028-05-31 | WALNUT | 91788 | Set up workspace |
| G PHILLIPS PLUMBING | 526195 | C-36 | 2027-03-31 | WALNUT | 91788 | Set up workspace |
| J AIRCON INC | 1107914 | B, C-20, C-36, C-46 | 2027-07-31 | WALNUT | 91789 | Set up workspace |
| JOHN THE PLUMBER | 669082 | C-36 | 2027-04-30 | WALNUT | 91789 | Set up workspace |
| KP PLUMBING INC | 1044093 | C-36 | 2028-05-31 | WALNUT | 91789 | Set up workspace |
| LA HABRA FIRE PROTECTION AND PLUMBING | 757985 | C-16, C-36 | 2027-01-31 | WALNUT | 91788 | Set up workspace |
| MAXIMUM MECHANICAL PLUMBING | 1051536 | C-36 | 2027-03-31 | WALNUT | 91789 | Set up workspace |
| MAXIMUS BUILDERS INC | 1000594 | B, C-36 | 2027-01-31 | WALNUT | 91789 | Set up workspace |
| MICHAEL JOELLSON | 957335 | C-36 | 2027-04-30 | WALNUT | 91789 | Set up workspace |
| MTEC | 873492 | B, C-33, C-36 | 2026-12-31 | WALNUT | 91789 | Set up workspace |
| PEACECAL PLUMBING | 1144632 | C-36 | 2027-10-31 | WALNUT | 91789 | Set up workspace |
| POMONA VALLEY PLUMBING HEATING AIR CONDITIONING CO INC | 1019549 | C-20, C-36 | 2026-10-31 | WALNUT | 91789 | Set up workspace |
| SCOTT CHIEN | 1089712 | B, C-10, C-16, C-36 | 2028-04-30 | WALNUT | 91789 | Set up workspace |
| UNITED RIGGERS & ERECTORS INC | 245451 | A, B, C-8, C-36, C-51, D21 | 2028-03-31 | WALNUT | 91789 | Set up workspace |
| WALNUT PLUMBING | 1005582 | C-36 | 2027-07-31 | WALNUT | 91789 | Set up workspace |
Quick answers
- How many plumbing contractors are in WALNUT?
- 21 with a current California license, as of 2026-08-31.
- How do I check a license is current?
- Every listing shows its state license number and expiry. Verify any of them directly against the California CSLB licensee database.