Best Licensed HVAC Contractors in Windsor, CA
11 HVAC contractors registered in Windsor hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 177 active C-20 heating and air conditioning licenses in Sonoma County; 11 registered in Windsor
- California requires workers' compensation cover for C-20 licensees: 10 of Windsor's 11 licenses (90.9%) carry a current policy with CSLB
- Median time licensed in Windsor: 2 years
- Longest Windsor licensure: since 2004
- 13 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 2004
- Expires
- 2026-10-31
- Phone
- (707) 838-9600
- Verified
- August 17, 2026
- Licensed since
- 2005
- Expires
- 2027-02-28
- Phone
- (707) 838-3311
- Verified
- August 17, 2026
- Licensed since
- 2008
- Expires
- 2028-04-30
- Phone
- (707) 953-0913
- Verified
- August 17, 2026
- Licensed since
- 2011
- Expires
- 2027-06-30
- Phone
- (707) 695-3726
- Verified
- August 17, 2026
- Licensed since
- 2021
- Expires
- 2027-09-30
- Phone
- (707) 387-8260
- Verified
- August 17, 2026
- Licensed since
- 2023
- Expires
- 2027-09-30
- Phone
- (707) 975-9588
- Verified
- August 17, 2026
- Licensed since
- 2023
- Expires
- 2027-11-30
- Phone
- (707) 477-8647
- Verified
- August 17, 2026
- Licensed since
- 2023
- Expires
- 2027-12-31
- Phone
- (707) 440-0590
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Leland Plumbing Heating & Air Cond | #848071 | On file | 2004 |
| Henry Mechanical | #855174 | On file | 2005 |
| Hayman Refrigeration & Air Conditioning | #913517 | On file | 2008 |
| Franco's Mechanical | #962011 | On file | 2011 |
| Contreras Heating & Air | #1080951 | Expired on file | 2021 |
| Bigham Home Services | #1109652 | On file | 2023 |
Sonoma County HVAC licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 177 active C-20 heating and air conditioning licenses in Sonoma County, 11 of them registered in Windsor. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Windsor license has been held 2 years, and the longest-standing one dates to 2004. 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: 10 of Windsor's 11 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: 177 of the county's 177 licenses carry the same $25,000 bond California sets by statute. 13 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 Windsor: common questions
How many licensed HVAC contractors are there in Windsor?
11 active C-20 heating and air conditioning licenses are registered in Windsor, out of 177 across Sonoma County. 11 Windsor-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. 11 active C-20 heating and air conditioning licenses are registered in Windsor and 177 across Sonoma County, the longest-standing issued in 2004. 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 10 of Windsor's 11 currently carry. 13 Sonoma County licenses expire within 90 days.