Best Licensed HVAC Contractors in Petaluma, CA
24 HVAC contractors registered in Petaluma 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; 24 registered in Petaluma
- California requires workers' compensation cover for C-20 licensees: 23 of Petaluma's 24 licenses (95.8%) carry a current policy with CSLB
- Median time licensed in Petaluma: 19 years
- Longest Petaluma licensure: since 1962
- 13 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1962
- Expires
- 2027-09-30
- Phone
- (707) 763-2649
- Verified
- August 17, 2026
- Licensed since
- 1963
- Expires
- 2028-01-31
- Phone
- (707) 579-3511
- Verified
- August 17, 2026
- Licensed since
- 1971
- Expires
- 2027-11-30
- Phone
- (707) 971-7686
- Verified
- August 17, 2026
- Licensed since
- 1972
- Expires
- 2028-01-31
- Phone
- (707) 795-6059
- Verified
- August 17, 2026
- Licensed since
- 1980
- Expires
- 2028-05-31
- Phone
- (415) 218-9281
- Verified
- August 17, 2026
- Licensed since
- 1986
- Expires
- 2028-06-30
- Phone
- (415) 456-2906
- Verified
- August 17, 2026
- Licensed since
- 1991
- Expires
- 2027-06-30
- Phone
- (707) 769-9655
- Verified
- August 17, 2026
- Licensed since
- 1991
- Expires
- 2026-09-30
- Phone
- (707) 322-6095
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Tri-county Heating And Sheet Metal Inc. | #212733 | On file | 1962 |
| Ernest Ongaro & Sons Inc. DBA Ongaro & Sons | #215233 | On file | 1963 |
| Bryan Masterson Enterprises | #271933 | On file | 1971 |
| Adams Refrigeration Service Inc. A California Corporation | #279103 | On file | 1972 |
| Paramount Plmg & Htg | #390434 | On file | 1980 |
| John Owens Services Inc. | #501853 | On file | 1986 |
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, 24 of them registered in Petaluma. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Petaluma license has been held 19 years, and the longest-standing one dates to 1962. 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: 23 of Petaluma's 24 licenses (95.8%) 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 Petaluma: common questions
How many licensed HVAC contractors are there in Petaluma?
24 active C-20 heating and air conditioning licenses are registered in Petaluma, out of 177 across Sonoma County. 24 Petaluma-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. 24 active C-20 heating and air conditioning licenses are registered in Petaluma and 177 across Sonoma County, the longest-standing issued in 1962. 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 23 of Petaluma's 24 currently carry. 13 Sonoma County licenses expire within 90 days.