Best Licensed Plumbers in Los Osos, CA
10 plumbing companies registered in Los Osos 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.
- 209 active C-36 plumbing licenses in San Luis Obispo County; 10 registered in Los Osos
- 4 of Los Osos's 10 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 Los Osos: 21 years
- Longest Los Osos licensure: since 1988
- 18 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (559) 359-7348
- Verified
- August 17, 2026
- Licensed since
- 1997
- Phone
- (805) 358-8605
- Verified
- August 17, 2026
- Licensed since
- 2013
- Phone
- (805) 602-2204
- Verified
- August 17, 2026
- Licensed since
- 2014
- Phone
- (805) 459-0373
- Verified
- August 17, 2026
- Licensed since
- 1988
- Phone
- (805) 748-7200
- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (805) 215-8937
- Verified
- August 17, 2026
- Licensed since
- 2002
- Phone
- (805) 668-1222
- Verified
- August 17, 2026
- Licensed since
- 2005
- Phone
- (805) 459-3961
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Mark Wallace Plumbing | #661873 | On file | 1992 |
| Maximum Services Company | #738081 | On file | 1997 |
| Fletcher Hesse Plumbing Inc. | #979873 | On file | 2013 |
| Bryan Hanft Plumbing | #993732 | On file | 2014 |
| Mike Fleming Construction | #538809 | Exempt or none on file | 1988 |
| Steve B Chauvet Cons Services | #640761 | Exempt or none on file | 1992 |
San Luis Obispo County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 209 active C-36 plumbing licenses in San Luis Obispo County, 10 of them registered in Los Osos. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Los Osos license has been held 21 years, and the longest-standing one dates to 1988. 4 of Los Osos's 10 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: 209 of the county's 209 licenses carry the same $25,000 bond California sets by statute. 18 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.
Plumbers in Los Osos: common questions
How many licensed plumbers are there in Los Osos?
10 active C-36 plumbing licenses are registered in Los Osos, out of 209 across San Luis Obispo County. 10 Los Osos-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 plumbers?
Yes. California licenses contractors by classification, and C-36 is the CSLB classification that authorises this work. 10 active C-36 plumbing licenses are registered in Los Osos and 209 across San Luis Obispo County, the longest-standing issued in 1988. Only CLEAR, unexpired licenses appear here.
How do I check a plumber'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 4 of Los Osos's 10 currently carry. 18 San Luis Obispo County licenses expire within 90 days.