Best Licensed HVAC Contractors in Belmont, CA
4 HVAC contractors registered in Belmont hold current CSLB licenses, verified against official records as of August 17, 2026. All 4 are listed below, ordered by years licensed.
- 135 active C-20 heating and air conditioning licenses in San Mateo County; 4 registered in Belmont
- California requires workers' compensation cover for C-20 licensees: 4 of Belmont's 4 licenses (100.0%) carry a current policy with CSLB
- Median time licensed in Belmont: 13 years
- Longest Belmont licensure: since 1985
- 13 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1985
- Expires
- 2027-01-31
- Phone
- (650) 583-8222
- Verified
- August 17, 2026
- Licensed since
- 1995
- Expires
- 2027-07-31
- Phone
- (650) 520-7146
- Verified
- August 17, 2026
- Licensed since
- 2012
- Expires
- 2026-12-31
- Phone
- (650) 387-2179
- Verified
- August 17, 2026
- Licensed since
- 2018
- Expires
- 2028-06-30
- Phone
- (415) 726-2093
Compare the top 4 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Innovative Mechanical Inc. | #468809 | On file | 1985 |
| Air Stream Hvac Service | #710338 | On file | 1995 |
| R T D Mechanical | #979427 | On file | 2012 |
| Pinnacle Heating And Air | #1040908 | On file | 2018 |
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, 4 of them registered in Belmont. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Belmont license has been held 13 years, and the longest-standing one dates to 1985. 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: 4 of Belmont's 4 licenses (100.0%) 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 Belmont: common questions
How many licensed HVAC contractors are there in Belmont?
4 active C-20 heating and air conditioning licenses are registered in Belmont, out of 135 across San Mateo County. 4 Belmont-registered companies passed our license verification, and all 4 are listed on this page. 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. 4 active C-20 heating and air conditioning licenses are registered in Belmont and 135 across San Mateo County, the longest-standing issued in 1985. 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 4 of Belmont's 4 currently carry. 13 San Mateo County licenses expire within 90 days.