Best Licensed HVAC Contractors in San Carlos, CA
10 HVAC contractors registered in San Carlos hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 135 active C-20 heating and air conditioning licenses in San Mateo County; 10 registered in San Carlos
- California requires workers' compensation cover for C-20 licensees: 9 of San Carlos's 10 licenses (90.0%) carry a current policy with CSLB
- Median time licensed in San Carlos: 21 years
- Longest San Carlos licensure: since 1984
- 13 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1984
- Expires
- 2028-05-31
- Phone
- (650) 654-2630
- Verified
- August 17, 2026
- Licensed since
- 1994
- Expires
- 2028-06-30
- Phone
- (650) 508-8300
- Verified
- August 17, 2026
- Licensed since
- 1998
- Expires
- 2028-02-29
- Phone
- (650) 594-1301
- Verified
- August 17, 2026
- Licensed since
- 2001
- Expires
- 2027-07-31
- Phone
- (650) 873-0344
- Verified
- August 17, 2026
- Licensed since
- 2004
- Expires
- 2027-11-30
- Phone
- (650) 593-0146
- Verified
- August 17, 2026
- Licensed since
- 2005
- Expires
- 2027-01-31
- Phone
- (650) 592-5634
- Verified
- August 17, 2026
- Licensed since
- 2005
- Expires
- 2027-10-31
- Phone
- (415) 706-2221
- Verified
- August 17, 2026
- Licensed since
- 2006
- Expires
- 2026-11-30
- Phone
- (650) 596-2920
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Service Unlimited Inc. | #456636 | On file | 1984 |
| Newcomb Mechanical Inc. | #699358 | On file | 1994 |
| Pacific Controls Engineering Inc. | #746152 | On file | 1998 |
| Zone 4 Construction Inc. | #797500 | On file | 2001 |
| J W Heating And Air Conditioning LLC | #832485 | On file | 2004 |
| M J Mechanical Services Inc. | #853653 | On file | 2005 |
San Mateo County HVAC licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 135 active C-20 heating and air conditioning licenses in San Mateo County, 10 of them registered in San Carlos. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Carlos license has been held 21 years, and the longest-standing one dates to 1984. California law requires workers' compensation cover for C-20 licensees, so it is a legal baseline rather than a way to tell two contractors apart: 9 of San Carlos's 10 licenses (90.0%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 135 of the county's 135 licenses carry the same $25,000 bond California sets by statute. 13 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.
HVAC Contractors in San Carlos: common questions
How many licensed HVAC contractors are there in San Carlos?
10 active C-20 heating and air conditioning licenses are registered in San Carlos, out of 135 across San Mateo County. 10 San Carlos-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 HVAC contractors?
Yes. California licenses contractors by classification, and C-20 is the CSLB classification that authorises this work. 10 active C-20 heating and air conditioning licenses are registered in San Carlos and 135 across San Mateo County, the longest-standing issued in 1984. Only CLEAR, unexpired licenses appear here.
How do I check an HVAC contractor'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 California requires of C-20 licensees and 9 of San Carlos's 10 currently carry. 13 San Mateo County licenses expire within 90 days.