Best Licensed HVAC Contractors in Pasadena, CA
41 HVAC contractors registered in Pasadena hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 2,674 active C-20 heating and air conditioning licenses in Los Angeles County; 44 registered in Pasadena
- California requires workers' compensation cover for C-20 licensees: 43 of Pasadena's 44 licenses (97.7%) carry a current policy with CSLB
- Median time licensed in Pasadena: 16 years
- Longest Pasadena licensure: since 1950
- 206 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1950
- Expires
- 2027-12-31
- Phone
- (818) 244-6571
- Verified
- August 17, 2026
- Licensed since
- 1966
- Expires
- 2027-01-31
- Phone
- (818) 219-3702
- Verified
- August 17, 2026
- Licensed since
- 1977
- Expires
- 2028-01-31
- Phone
- (626) 577-4294
- Verified
- August 17, 2026
- Licensed since
- 1983
- Expires
- 2027-06-30
- Phone
- (818) 500-1099
- Verified
- August 17, 2026
- Licensed since
- 1984
- Expires
- 2028-03-31
- Phone
- (626) 792-3710
- Verified
- August 17, 2026
- Licensed since
- 1988
- Expires
- 2028-09-30
- Phone
- (626) 795-8880
- Verified
- August 17, 2026
- Licensed since
- 1989
- Expires
- 2027-01-31
- Phone
- (626) 833-0000
- Verified
- August 17, 2026
- Licensed since
- 1996
- Expires
- 2028-08-31
- Phone
- (626) 791-9050
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Acco Engineered Sytems, Inc. | #120696 | On file | 1950 |
| L E Dimit Plumbing And Heating Co | #243853 | On file | 1966 |
| George Haney & Son Inc. | #329449 | On file | 1977 |
| Valid Mechanical Services | #441012 | On file | 1983 |
| Amc Ajemian Mechanical Corporation | #457342 | On file | 1984 |
| Air-tech Air Conditioning & Heating Inc. | #541161 | On file | 1988 |
Los Angeles County HVAC licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 2,674 active C-20 heating and air conditioning licenses in Los Angeles County, 44 of them registered in Pasadena. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Pasadena license has been held 16 years, and the longest-standing one dates to 1950. 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: 43 of Pasadena's 44 licenses (97.7%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 2,672 of the county's 2,674 licenses carry the same $25,000 bond California sets by statute. 206 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 Pasadena: common questions
How many licensed HVAC contractors are there in Pasadena?
44 active C-20 heating and air conditioning licenses are registered in Pasadena, out of 2,674 across Los Angeles County. 41 Pasadena-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. 44 active C-20 heating and air conditioning licenses are registered in Pasadena and 2,674 across Los Angeles County, the longest-standing issued in 1950. 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 43 of Pasadena's 44 currently carry. 206 Los Angeles County licenses expire within 90 days.