Best Licensed HVAC Contractors in Walnut, CA
21 HVAC contractors registered in Walnut 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; 22 registered in Walnut
- California requires workers' compensation cover for C-20 licensees: 20 of Walnut's 22 licenses (90.9%) carry a current policy with CSLB
- Median time licensed in Walnut: 9 years
- Longest Walnut licensure: since 1983
- 206 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1983
- Expires
- 2027-08-31
- Phone
- (626) 786-6012
- Verified
- August 17, 2026
- Licensed since
- 1984
- Expires
- 2028-01-31
- Phone
- (909) 598-8900
- Verified
- August 17, 2026
- Licensed since
- 1998
- Expires
- 2028-05-31
- Phone
- (626) 325-4321
- Verified
- August 17, 2026
- Licensed since
- 2003
- Expires
- 2027-10-31
- Phone
- (909) 869-8660
- Verified
- August 17, 2026
- Licensed since
- 2007
- Expires
- 2028-07-31
- Phone
- (626) 848-2736
- Verified
- August 17, 2026
- Licensed since
- 2011
- Expires
- 2027-12-31
- Phone
- (909) 915-9135
- Verified
- August 17, 2026
- Licensed since
- 2012
- Expires
- 2026-10-31
- Phone
- (626) 392-1058
- Verified
- August 17, 2026
- Licensed since
- 2014
- Expires
- 2026-11-30
- Phone
- (909) 837-7779
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Air Temperature Control | #449261 | On file | 1983 |
| Weatherite Corporation | #451778 | On file | 1984 |
| David's Repair Center | #750042 | On file | 1998 |
| Alliance Industrial Refrigeration Services Inc. | #825297 | On file | 2003 |
| Cinda Construction Inc. | #890143 | On file | 2007 |
| S T W Hvac | #968650 | On file | 2011 |
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, 22 of them registered in Walnut. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Walnut license has been held 9 years, and the longest-standing one dates to 1983. 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: 20 of Walnut's 22 licenses (90.9%) 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 Walnut: common questions
How many licensed HVAC contractors are there in Walnut?
22 active C-20 heating and air conditioning licenses are registered in Walnut, out of 2,674 across Los Angeles County. 21 Walnut-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. 22 active C-20 heating and air conditioning licenses are registered in Walnut and 2,674 across Los Angeles County, the longest-standing issued in 1983. 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 20 of Walnut's 22 currently carry. 206 Los Angeles County licenses expire within 90 days.