Best Licensed HVAC Contractors in Duarte, CA
7 HVAC contractors registered in Duarte hold current CSLB licenses, verified against official records as of August 17, 2026. All 7 are listed below, ordered by years licensed.
- 2,674 active C-20 heating and air conditioning licenses in Los Angeles County; 7 registered in Duarte
- California requires workers' compensation cover for C-20 licensees: 7 of Duarte's 7 licenses (100.0%) carry a current policy with CSLB
- Median time licensed in Duarte: 29 years
- Longest Duarte licensure: since 1986
- 206 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1986
- Expires
- 2028-06-30
- Phone
- (626) 357-5288
- Verified
- August 17, 2026
- Licensed since
- 1987
- Expires
- 2027-06-30
- Phone
- (562) 353-7020
- Verified
- August 17, 2026
- Licensed since
- 1995
- Expires
- 2027-05-31
- Phone
- (626) 722-0595
- Verified
- August 17, 2026
- Licensed since
- 1996
- Expires
- 2026-09-30
- Phone
- (626) 359-8303
- Verified
- August 17, 2026
- Licensed since
- 2010
- Expires
- 2027-11-30
- Phone
- (626) 804-7800
- Verified
- August 17, 2026
- Licensed since
- 2015
- Expires
- 2027-06-30
- Phone
- (626) 665-6939
- Verified
- August 17, 2026
- Licensed since
- 2024
- Expires
- 2028-09-30
- Phone
- (213) 268-3136
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Gregory Retzepis DBA Gr Plumbing & Heating | #492976 | On file | 1986 |
| Kline's Kustom Heating & Air Inc. | #519892 | On file | 1987 |
| Winegard Energy Inc. | #706874 | On file | 1995 |
| Marco's Heating And Air | #727611 | On file | 1996 |
| Tempro Refrigeration Inc. | #947810 | On file | 2010 |
| Agape Air Condition & Heating Inc. | #1004863 | On file | 2015 |
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, 7 of them registered in Duarte. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Duarte license has been held 29 years, and the longest-standing one dates to 1986. 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: 7 of Duarte's 7 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: 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 Duarte: common questions
How many licensed HVAC contractors are there in Duarte?
7 active C-20 heating and air conditioning licenses are registered in Duarte, out of 2,674 across Los Angeles County. 7 Duarte-registered companies passed our license verification, and all 7 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. 7 active C-20 heating and air conditioning licenses are registered in Duarte and 2,674 across Los Angeles County, the longest-standing issued in 1986. 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 7 of Duarte's 7 currently carry. 206 Los Angeles County licenses expire within 90 days.