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Licensed Plumbers in San Mateo, California

Updated November 1, 2026 from CSLB's public license file · C-36 Plumbing Contractor

  • 53licensed plumbers
  • 50active (Clear)
  • 5.7%with a suspension
  • 56.6%workers' comp exempt
  • 16.5 yrsmedian time licensed
  • 50.9%corp / LLC / partnership (49.1% sole owner)
  • 2new in the last 12 months
  • —change tracking began November 1, 2026

There are 53 plumbers based in San Mateo in CSLB's current file. 50 (94.3%) have a Clear status as of November 1, 2026.

The share with a suspension, 5.7%, is 2.8 points higher than the San Mateo County rate for the same license (2.9%). 56.6% report a workers' comp exemption, 5.4 points higher than the statewide figure for plumbers (51.2%), so many of these businesses say they have no employees.

The median plumber here has held a license for 16.5 years (more than the statewide median of 13.4), and 2 licenses were issued in the last 12 months.

In California this work generally calls for the C-36 Plumbing Contractor license (or a B license when it is part of a larger multi-trade job). See the C-36 Plumbing Contractor guide for what the license covers.

How to check a plumber's license in San Mateo

  1. Open the plumber's profile from the table below (or search San Mateo listings by name). Check that C-36 appears among its classifications and that the primary status reads Clear. What C-36 covers.
  2. Re-check the same number on CSLB's Instant License Check the day you sign; our copy is refreshed weekly and 5.7% of San Mateo listings here already show a suspension.
  3. Get the bid and contract in writing with the license number on it. If the job tops $1,000 in labor and materials, a licensed plumber is required by law. See the $1,000 rule.

50 of 53 plumbers in San Mateo

San Mateo plumbers sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed plumbers in San Mateo
Business nameLicense #StatusYearsWorkers' compBond
Lindstrom CO 244500 Clear 60 Insured On file
Imbelloni Construction CO INC 304975 Clear 51 Insured On file
J W McClenahan CO 308818 Clear 51 Insured On file
Dittmann Plumbing INC 311169 Clear 51 Insured On file
Doell Alan Construction 484867 Clear 40 Exempt On file
Century One Plumbing & Construction INC 532683 Clear 38 Exempt On file
Massoudi J Plumbing 533540 Clear 38 Exempt On file
Bel Carlos Plumbing 632903 Clear 34 Insured On file
G P S Plumbing 672474 Clear 33 Exempt On file
Acme Mechanical 764477 Clear 27 Exempt On file
Express Plumbing 778428 Clear 26 Insured On file
Ace Heating & Air Conditioning INC 794984 Clear 25 Insured On file
Brycor 804229 Clear 24 Exempt On file
Bennett General Contractors 809697 Clear 24 Exempt On file
Wing Cary Plumbing & Fire Protection INC 815871 Clear 23 Insured On file
Chang Chin - Shui 818559 Clear 23 Exempt On file
American Plumbing & Drain 851101 Clear 21 Exempt On file
Brandt Plumbing 860519 Clear 21 Exempt On file
Hillside Plumbing Company INC 860119 Clear 21 Insured On file
J H K Plumbing Services 883271 Clear 20 Exempt On file
Grant Plumbing 890480 Clear 19 Exempt On file
Gregg's Plumbing & Heating INC 900741 Clear 19 Exempt On file
Hibernian Plumbing and Fire Protection 918510 Clear 18 Insured On file
Backflow Pro INC the 933568 Clear 17 Insured On file
Hamzeh Plumbing 945729 Clear 16 Exempt On file
Bullseye Plumbing 961960 Clear 15 Exempt On file
Flat Rate Plumbing and Drain 964565 Clear 15 Exempt On file
Chang Ray 966484 Clear 15 Exempt On file
Covey Plumbing 965817 Clear 15 Exempt On file
Nejasmich INC 973148 Clear 14 Insured On file
Wizard Plumbing and Drain LLC 974521 Clear 14 Insured On file
Fitzgerald Tomas Construction INC 979673 Clear 13 Insured On file
Lopez Remodeling 988145 Clear 13 Exempt On file
Jimenez Hydronics 1016094 Clear 10 Insured On file
Tremors Plumbing and Sewer 1023331 Clear 9 Exempt On file
Navarro's Plumbing 1050481 Clear 7 Insured On file
A G R Plumbing 1072671 Clear 5 Exempt On file
F C C Plumbing INC 1077108 Clear 5 Insured On file
Promo Plumbing INC 1085836 Clear 4 Insured On file
Tremors Plumbing and Sewer INC 1095390 Clear 4 Insured On file
Hemi's Plumbing Service LLC 1099842 Clear 3 Insured On file
V B R C Construction INC 1104027 Clear 3 Exempt On file
Maz Plumbing Under Ground and Sewer Services LLC 1111601 Clear 3 Exempt On file
D Z Plumbing 1114194 Clear 2 Exempt On file
Gws Plumbing & Sewer 1131694 Clear 1 Exempt On file
Water Heater Boys LLC 1134458 Clear 1 Insured On file
The Plumbers Brothers and Rooter INC 1142928 Clear 1 Exempt On file
Stan Flow Plumbing Corp 1145225 Clear 1 Exempt On file
Sazo Plumbing 1156175 Clear <1 Exempt On file
C & S Plumbing Services Solutions 1162953 Clear <1 Exempt On file

See all 53 plumbers in San Mateo

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed plumbers are in San Mateo?

CSLB's current public file lists 53 plumbers with a San Mateo mailing address. 50 have a Clear status, and 86.8% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a plumber need in California?

In California this work generally calls for the C-36 Plumbing Contractor license (or a B license when it is part of a larger multi-trade job). Any job of $1,000 or more in labor and materials needs a licensed contractor. Read our guide to the $1,000 rule.

How do I check a plumber's workers' comp?

Open the contractor's profile here to see the workers' comp type and insurer from CSLB's file. In San Mateo, 43.4% of plumbers list a policy, 56.6% claim an exemption and 0% show no current coverage. Confirm the policy with CSLB's workers' comp search before work starts. How to check workers' comp.

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Guides