Best Licensed Plumbers in San Mateo, CA
46 plumbing companies registered in San Mateo hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by workers' compensation cover and years licensed.
- 426 active C-36 plumbing licenses in San Mateo County; 48 registered in San Mateo
- 21 of San Mateo's 48 licenses (43.8%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in San Mateo: 16 years
- Longest San Mateo licensure: since 1966
- 35 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1966
- Phone
- (650) 343-4542
- Verified
- August 17, 2026
- Licensed since
- 1972
- Phone
- (650) 342-3200
- Verified
- August 17, 2026
- Licensed since
- 1975
- Phone
- (650) 692-7333
- Verified
- August 17, 2026
- Licensed since
- 1975
- Phone
- (650) 345-1691
- Verified
- August 17, 2026
- Licensed since
- 1975
- Phone
- (650) 343-2159
- Verified
- August 17, 2026
- Licensed since
- 1991
- Phone
- (650) 574-2800
- Verified
- August 17, 2026
- Licensed since
- 2000
- Phone
- (650) 343-9477
- Verified
- August 17, 2026
- Licensed since
- 2002
- Phone
- (650) 619-4150
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Lindstrom Co | #244500 | On file | 1966 |
| Izmirian Roofing & Sheet Metal | #277624 | On file | 1972 |
| Imbelloni Construction Co Inc. | #304975 | On file | 1975 |
| J W Mcclenahan Co | #308818 | On file | 1975 |
| Dittmann Plumbing Inc. | #311169 | On file | 1975 |
| Bel Carlos Plumbing | #632903 | On file | 1991 |
San Mateo County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 426 active C-36 plumbing licenses in San Mateo County, 48 of them registered in San Mateo. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Mateo license has been held 16 years, and the longest-standing one dates to 1966. 21 of San Mateo's 48 licenses (43.8%) carry current workers' compensation cover in CSLB's file. That is employee injury cover, not liability insurance, and a blank usually means an owner-operator with no employees - lawful, and not a mark against anyone. The contractor bond is not a signal here: 426 of the county's 426 licenses carry the same $25,000 bond California sets by statute. 35 county licenses reach their expiration date within the next 90 days. CSLB cannot link straight to a license record, so every listing above shows its number for you to type into CSLB's license lookup. How we verify.
Plumbers in San Mateo: common questions
How many licensed plumbers are there in San Mateo?
48 active C-36 plumbing licenses are registered in San Mateo, out of 426 across San Mateo County. 46 San Mateo-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. Only licenses CSLB shows as CLEAR and unexpired are listed.
Does California license plumbers?
Yes. California licenses contractors by classification, and C-36 is the CSLB classification that authorises this work. 48 active C-36 plumbing licenses are registered in San Mateo and 426 across San Mateo County, the longest-standing issued in 1966. Only CLEAR, unexpired licenses appear here.
How do I check a plumber's license in California?
Every listing above shows its CSLB license number. CSLB cannot link straight to a record, so open its license lookup and type the number in: it shows status, expiration, the contractor bond and workers' compensation cover, which 21 of San Mateo's 48 currently carry. 35 San Mateo County licenses expire within 90 days.