Best Licensed Septic Contractors in Oakland, CA
26 septic companies registered in Oakland hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by workers' compensation cover and years licensed.
- 71 active C-42 sanitation system licenses in Alameda County; 26 registered in Oakland
- 18 of Oakland's 26 licenses (69.2%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Oakland: 10 years
- Longest Oakland licensure: since 1980
- 11 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1980
- Phone
- (510) 632-3173
- Verified
- August 17, 2026
- Licensed since
- 1990
- Phone
- (510) 746-4000
- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (510) 712-5068
- Verified
- August 17, 2026
- Licensed since
- 1996
- Phone
- (510) 388-0567
- Verified
- August 17, 2026
- Licensed since
- 2000
- Phone
- (925) 837-6766
- Verified
- August 17, 2026
- Licensed since
- 2004
- Phone
- (510) 528-4292
- Verified
- August 17, 2026
- Licensed since
- 2014
- Phone
- (510) 415-5774
- Verified
- August 17, 2026
- Licensed since
- 2015
- Phone
- (510) 292-6558
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Monterey And Mwh Constructors, A Joint Venture | #388361 | On file | 1980 |
| Broadway Mechanical-big Pipe Joint Venture | #584263 | On file | 1990 |
| Knox Sewer And Backhoe Service Inc. | #659212 | On file | 1992 |
| Emergency Rooter | #729165 | On file | 1996 |
| Williams Underground Construction Inc. | #787857 | On file | 2000 |
| Jaime D Renderos Inc. DBA Ehret Co Plumbing | #834005 | On file | 2004 |
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, 26 of them registered in Oakland. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Oakland license has been held 10 years, and the longest-standing one dates to 1980. 18 of Oakland's 26 licenses (69.2%) 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 Oakland: common questions
How many licensed septic contractors are there in Oakland?
26 active C-42 sanitation system licenses are registered in Oakland, out of 71 across Alameda County. 26 Oakland-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 septic contractors?
Yes. California licenses contractors by classification, and C-42 is the CSLB classification that authorises this work. 26 active C-42 sanitation system licenses are registered in Oakland and 71 across Alameda County, the longest-standing issued in 1980. 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 18 of Oakland's 26 currently carry. 11 Alameda County licenses expire within 90 days.
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