Best Licensed HVAC Contractors in San Lorenzo, CA
5 HVAC contractors registered in San Lorenzo hold current CSLB licenses, verified against official records as of August 17, 2026. All 5 are listed below, ordered by years licensed.
- 273 active C-20 heating and air conditioning licenses in Alameda County; 5 registered in San Lorenzo
- California requires workers' compensation cover for C-20 licensees: 5 of San Lorenzo's 5 licenses (100.0%) carry a current policy with CSLB
- Median time licensed in San Lorenzo: 7 years
- Longest San Lorenzo licensure: since 2005
- 20 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 2005
- Expires
- 2027-04-30
- Phone
- (408) 268-7653
- Verified
- August 17, 2026
- Licensed since
- 2008
- Expires
- 2026-12-31
- Phone
- (510) 432-1742
- Verified
- August 17, 2026
- Licensed since
- 2018
- Expires
- 2026-09-30
- Phone
- (510) 755-5105
- Verified
- August 17, 2026
- Licensed since
- 2023
- Expires
- 2027-12-31
- Phone
- (415) 651-4977
- Verified
- August 17, 2026
- Licensed since
- 2026
- Expires
- 2028-03-31
- Phone
- (415) 218-0484
Compare the top 5 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Deng Construction | #857147 | On file | 2005 |
| Oliver Heating And Air | #915348 | On file | 2008 |
| Alaniz Heating & Air | #1044935 | On file | 2018 |
| Philip And Lorenzo Plumbing Inc. | #1114298 | On file | 2023 |
| The Way Mechanical | #1152130 | On file | 2026 |
Alameda County HVAC licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 273 active C-20 heating and air conditioning licenses in Alameda County, 5 of them registered in San Lorenzo. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Lorenzo license has been held 7 years, and the longest-standing one dates to 2005. 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: 5 of San Lorenzo's 5 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: 273 of the county's 273 licenses carry the same $25,000 bond California sets by statute. 20 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 San Lorenzo: common questions
How many licensed HVAC contractors are there in San Lorenzo?
5 active C-20 heating and air conditioning licenses are registered in San Lorenzo, out of 273 across Alameda County. 5 San Lorenzo-registered companies passed our license verification, and all 5 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. 5 active C-20 heating and air conditioning licenses are registered in San Lorenzo and 273 across Alameda County, the longest-standing issued in 2005. 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 5 of San Lorenzo's 5 currently carry. 20 Alameda County licenses expire within 90 days.