Best Licensed HVAC Contractors in San Marcos, CA
20 HVAC contractors registered in San Marcos hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 850 active C-20 heating and air conditioning licenses in San Diego County; 20 registered in San Marcos
- California requires workers' compensation cover for C-20 licensees: 19 of San Marcos's 20 licenses (95.0%) carry a current policy with CSLB
- Median time licensed in San Marcos: 15 years
- Longest San Marcos licensure: since 1958
- 69 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1958
- Expires
- 2026-12-31
- Phone
- (760) 801-9070
- Verified
- August 17, 2026
- Licensed since
- 1978
- Expires
- 2028-04-30
- Phone
- (858) 486-2590
- Verified
- August 17, 2026
- Licensed since
- 1988
- Expires
- 2028-03-31
- Phone
- (760) 594-1125
- Verified
- August 17, 2026
- Licensed since
- 2000
- Expires
- 2028-04-30
- Phone
- (760) 415-7935
- Verified
- August 17, 2026
- Licensed since
- 2000
- Expires
- 2028-06-30
- Phone
- (760) 802-5680
- Verified
- August 17, 2026
- Licensed since
- 2002
- Expires
- 2028-03-31
- Phone
- (760) 533-7171
- Verified
- August 17, 2026
- Licensed since
- 2006
- Expires
- 2027-09-30
- Phone
- (760) 458-2797
- Verified
- August 17, 2026
- Licensed since
- 2006
- Expires
- 2026-09-30
- Phone
- (760) 412-2074
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Ace Contractors | #175404 | On file | 1958 |
| Acuna's Polar Aire | #352974 | On file | 1978 |
| Altered Air | #531080 | On file | 1988 |
| Excel Air Co | #781259 | On file | 2000 |
| Randle Air Conditioning Inc. | #782083 | On file | 2000 |
| Green Building Test & Balance Co | #805186 | On file | 2002 |
San Diego County HVAC licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 850 active C-20 heating and air conditioning licenses in San Diego County, 20 of them registered in San Marcos. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Marcos license has been held 15 years, and the longest-standing one dates to 1958. 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: 19 of San Marcos's 20 licenses (95.0%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 850 of the county's 850 licenses carry the same $25,000 bond California sets by statute. 69 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 Marcos: common questions
How many licensed HVAC contractors are there in San Marcos?
20 active C-20 heating and air conditioning licenses are registered in San Marcos, out of 850 across San Diego County. 20 San Marcos-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. 20 active C-20 heating and air conditioning licenses are registered in San Marcos and 850 across San Diego County, the longest-standing issued in 1958. 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 19 of San Marcos's 20 currently carry. 69 San Diego County licenses expire within 90 days.