Licensed Septic Companies in Lassen County, CA
9 septic companies serve Lassen 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).
9 septic companies in Lassen County
Susanville 5
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Concrete Unlimited
478-010 Estates Drive, Susanville, CA 96130
- Licensed: California Licensed Contractor (C-8, C12, C42) · #786882 (California Contractors State License Board, verify)
Per state license: Installation
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Eagle Lake Construction
687-630 Maple Way, Susanville, CA 96130
- Licensed: California Licensed Contractor (B, C42) · #891767 (California Contractors State License Board, verify)
Per state license: Installation
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Pee Wee Enterprises
701-315 Richmond Road E, Susanville, CA 96130
- Licensed: California Licensed Contractor (A, C12, C21, C42) · #859334 (California Contractors State License Board, verify)
Per state license: Installation
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Silkwood Septic LLC
470 N Spring St, Susanville, CA 96130
- Licensed: California Licensed Contractor (C12, C42) · #1066876 (California Contractors State License Board, verify)
Per state license: Installation
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Stoneco Construction Inc
P O Box 1210, Susanville, CA 96130
- Licensed: California Licensed Contractor (A, B, C-2, C10, C13, C20, C34, C36, C42, HAZ) · #517925 (California Contractors State License Board, verify)
- Licensed: California Licensed Contractor (A, B, C-2, C10, C20, C34, C36) · #917330 (California Contractors State License Board, verify)
Per state license: Installation
Janesville 2
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Harlans Bobcat/B-Hoe Service
465-455 Norvell Lane, Janesville, CA 96114
- Licensed: California Licensed Contractor (C42) · #852760 (California Contractors State License Board, verify)
Per state license: Installation
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J M H Construction Services Inc
P O Box 624, Janesville, CA 96114
- Licensed: California Licensed Contractor (B, C42) · #917787 (California Contractors State License Board, verify)
Per state license: Installation
Lake Almanor 2
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Turner Excavating Inc
3746 Big Springs Rd, Lake Almanor, CA 96137
- Licensed: California Licensed Contractor (C12, C21, C42) · #667295 (California Contractors State License Board, verify)
Per state license: Installation
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Womack Construction
461 Firehouse Road, Lake Almanor, CA 96137
- Licensed: California Licensed Contractor (B, C12, C13, C21, C33, C36, C42) · #463119 (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 Lassen 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 Lassen County: common questions
How many licensed septic companies are in Lassen County, CA?
9 septic companies serve Lassen 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 install septic systems in Lassen County?
9 listings in Lassen 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.