Best Licensed HVAC Contractors in Alamo, CA
4 HVAC contractors registered in Alamo hold current CSLB licenses, verified against official records as of August 17, 2026. All 4 are listed below, ordered by years licensed.
- 317 active C-20 heating and air conditioning licenses in Contra Costa County; 4 registered in Alamo
- California requires workers' compensation cover for C-20 licensees: 4 of Alamo's 4 licenses (100.0%) carry a current policy with CSLB
- Median time licensed in Alamo: 17 years
- Longest Alamo licensure: since 1984
- 28 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1984
- Expires
- 2026-10-31
- Phone
- (510) 432-3028
- Verified
- August 17, 2026
- Licensed since
- 1991
- Expires
- 2027-03-31
- Phone
- (925) 945-8501
- Verified
- August 17, 2026
- Licensed since
- 2008
- Expires
- 2026-08-31
- Phone
- (925) 212-7327
- Verified
- August 17, 2026
- Licensed since
- 2010
- Expires
- 2027-03-31
- Phone
- (415) 342-2033
Compare the top 4 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Alco Sheet Metal & Heating Inc. | #464367 | On file | 1984 |
| Massone Mechanical Inc. | #615532 | On file | 1991 |
| Wes Gardner Heating & A/c | #921166 | On file | 2008 |
| Super Cool Mechanical Inc. | #943999 | On file | 2010 |
Contra Costa County HVAC licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 317 active C-20 heating and air conditioning licenses in Contra Costa County, 4 of them registered in Alamo. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Alamo license has been held 17 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: 4 of Alamo'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: 317 of the county's 317 licenses carry the same $25,000 bond California sets by statute. 28 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 Alamo: common questions
How many licensed HVAC contractors are there in Alamo?
4 active C-20 heating and air conditioning licenses are registered in Alamo, out of 317 across Contra Costa County. 4 Alamo-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 Alamo and 317 across Contra Costa 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 4 of Alamo's 4 currently carry. 28 Contra Costa County licenses expire within 90 days.