Best Licensed Septic Contractors in San Lorenzo, CA
4 septic companies registered in San Lorenzo hold current CSLB licenses, verified against official records as of August 17, 2026. All 4 are listed below, ordered by workers' compensation cover and years licensed.
- 71 active C-42 sanitation system licenses in Alameda County; 5 registered in San Lorenzo
- 2 of San Lorenzo's 5 licenses (40.0%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in San Lorenzo: 19 years
- Longest San Lorenzo licensure: since 2000
- 11 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 2004
- Phone
- (510) 481-1555
- Verified
- August 17, 2026
- Licensed since
- 2021
- Phone
- (510) 876-3549
- Verified
- August 17, 2026
- Licensed since
- 2000
- Phone
- (510) 524-9694
- Verified
- August 17, 2026
- Licensed since
- 2022
- Phone
- (510) 427-6710
Compare the top 4 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Star Rooter & Plumbing | #845187 | Exempt or none on file | 2004 |
| Nexgen Rooter And Plumbing Inc. | #1083613 | On file | 2021 |
| Tap - Tite Company | #786502 | Exempt or none on file | 2000 |
| Michael Gardner Plumbing | #1087221 | Exempt or none on file | 2022 |
Alameda County septic licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 71 active C-42 sanitation system 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 19 years, and the longest-standing one dates to 2000. 2 of San Lorenzo's 5 licenses (40.0%) carry current workers' compensation cover in CSLB's file. That is employee injury cover, not liability insurance, and a blank usually means an owner-operator with no employees - lawful, and not a mark against anyone. The contractor bond is not a signal here: 71 of the county's 71 licenses carry the same $25,000 bond California sets by statute. 11 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.
Septic Contractors in San Lorenzo: common questions
How many licensed septic contractors are there in San Lorenzo?
5 active C-42 sanitation system licenses are registered in San Lorenzo, out of 71 across Alameda County. 4 San Lorenzo-registered companies passed our license verification, and all 4 are listed on this page. Only licenses CSLB shows as CLEAR and unexpired are listed.
Does California license septic contractors?
Yes. California licenses contractors by classification, and C-42 is the CSLB classification that authorises this work. 5 active C-42 sanitation system licenses are registered in San Lorenzo and 71 across Alameda County, the longest-standing issued in 2000. Only CLEAR, unexpired licenses appear here.
How do I check a septic 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 2 of San Lorenzo's 5 currently carry. 11 Alameda County licenses expire within 90 days.
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