Licensed Septic Companies in Mendocino County, CA
9 septic companies serve Mendocino County, California, and 9 of them hold a California septic license or certification matched to the California Contractors State License Board list (data as of October 2026).
Septic services in Mendocino County
Guides: Septic tank pumping · Septic system installation · Drain field repair · Installation cost · Pumping cost
9 septic companies in Mendocino County
Gualala 3
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Farley Robert Allen
P O Box 783, Gualala, CA 95445
- Licensed: California Licensed Contractor (C42) · #912007 (California Contractors State License Board, verify)
Per state license: Installation
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Sundstrom Matthew Construction
P O Box 1374, Gualala, CA 95445
- Licensed: California Licensed Contractor (B, C42) · #1025975 (California Contractors State License Board, verify)
Per state license: Installation
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Tom'S Plumbing Inc
P O Box 92, Gualala, CA 95445
- Licensed: California Licensed Contractor (C36, C42) · #281907 (California Contractors State License Board, verify)
Per state license: Installation
Ukiah 2
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Crosetti Excavation, Inc
800 Riverside Dr, Ukiah, CA 95482
- Licensed: California Licensed Contractor (A, C12, C13, C31, C34, C42, C57, HAZ) · #1150162 (California Contractors State License Board, verify)
Per state license: Installation
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Howard Lee Construction Company
3900 Parducci Rd, Ukiah, CA 95482
- Licensed: California Licensed Contractor (A, C12, C13, C31, C34, C42, C57, HAZ) · #280777 (California Contractors State License Board, verify)
Per state license: Installation
Fort Bragg 1
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Watkins Sand & Gravel
23721 Bouldin Lane, Fort Bragg, CA 95437
- Licensed: California Licensed Contractor (C12, C42) · #871266 (California Contractors State License Board, verify)
Per state license: Installation
Little River 1
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A-1 Septic Tank Services
41221 Little River Airport Rd, Little River, CA 95456
- Licensed: California Licensed Contractor (C42) · #838308 (California Contractors State License Board, verify)
From their website: Pumping · Drain field · Grease traps Per state license: Installation
Littleriver 1
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J A Construction
P O Box 570, Littleriver, CA 95456
- Licensed: California Licensed Contractor (B, C42) · #1049847 (California Contractors State License Board, verify)
Per state license: Installation
Talmage 1
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Plumbline Services Inc
Po Box 76, Talmage, CA 95481
- Licensed: California Licensed Contractor (C-4, C16, C36, C42) · #403423 (California Contractors State License Board, verify)
Per state license: Installation
No listings match those filters.
Septic licensing in California
California has no license named for septic work; septic systems fall under the C-42 Sanitation System classification. Counties issue system permits. The Contractors State License Board (CSLB) issues these credentials: C-42 Sanitation System contractor license.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Mendocino County and whether the permit fee is in their quote.
California septic licensing: agencies, license types and how to check a license →
Septic companies in Mendocino County: common questions
How many licensed septic companies are in Mendocino County, CA?
9 septic companies serve Mendocino County, California, and 9 of them hold a California septic license or certification matched to the California Contractors State License Board list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.
Who licenses septic contractors in California?
California has no license named for septic work; septic systems fall under the C-42 Sanitation System classification. Counties issue system permits. The licensing body is the Contractors State License Board (CSLB).
Which companies pump septic tanks in Mendocino County?
1 of the 9 listings in Mendocino County offer septic tank pumping, either on their own website or under a state pumper license. Use the service filter above to show only those companies.
Which companies install septic systems in Mendocino County?
9 listings in Mendocino County install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their California license.
How do I check a septic contractor's license in California?
Use the Contractors State License Board (CSLB)'s lookup (https://www.cslb.ca.gov/onlineservices/checklicenseII/checklicense.aspx) and search the contractor's name or license number. Our guide to checking a septic license walks through it.