Licensed Septic Companies in San Luis Obispo County, CA
12 septic companies serve San Luis Obispo County, California, and 12 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 San Luis Obispo County
Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Drain field repair · Installation cost · Pumping cost
12 septic companies in San Luis Obispo County
Los Osos 4
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Al'S Septic Pumping Service Inc
P O Box 6996, Los Osos, CA 93412
- Licensed: California Licensed Contractor (C42) · #883281 (California Contractors State License Board, verify)
Per state license: Installation
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Merrill Frank Backhoe Services
1431 Los Oses Valley Rd, Los Osos, CA 93402
- Licensed: California Licensed Contractor (C12, C42) · #337347 (California Contractors State License Board, verify)
Per state license: Installation
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Story's Construction
P O Box 6805, Los Osos, CA 93412
- Licensed: California Licensed Contractor (B, C42) · #870176 (California Contractors State License Board, verify)
From their website: Pumping · Installation · Inspection
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Tutt Tree Crane And Service
P O Box 6039, Los Osos, CA 93412
- Licensed: California Licensed Contractor (A, C42, C49) · #606137 (California Contractors State License Board, verify)
Per state license: Installation
Paso Robles 4
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Alliance Septic Service
P O Box 3357, Paso Robles, CA 93447
- Licensed: California Licensed Contractor (C42) · #1009043 (California Contractors State License Board, verify)
From their website: Pumping · Installation · Inspection · Repair · Drain field · Risers & lids
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Muniz Excavating Inc
5935 South El Pomar Rd, Paso Robles, CA 93446
- Licensed: California Licensed Contractor (A, C42) · #951129 (California Contractors State License Board, verify)
Per state license: Installation
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North County Septic Service Inc
P O Box 2282, Paso Robles, CA 93447
- Licensed: California Licensed Contractor (C42) · #983162 (California Contractors State License Board, verify)
Per state license: Installation
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Valentine's Concrete Products
P O Box 261, Paso Robles, CA 93465
- Licensed: California Licensed Contractor (C12, C42) · #351033 (California Contractors State License Board, verify)
From their website: Inspection Per state license: Installation
Arroyo Grande 1
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Dan Kies Construction And Excavating
P O Box 717, Arroyo Grande, CA 93421
- Licensed: California Licensed Contractor (A, C42) · #770692 (California Contractors State License Board, verify)
- Licensed: California Licensed Contractor (B) · #1162505 (California Contractors State License Board, verify)
Per state license: Installation
Atascadero 1
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A-Jay Excavating Inc
P O Box 554, Atascadero, CA 93423
- Licensed: California Licensed Contractor (A, C42) · #500085 (California Contractors State License Board, verify)
- Licensed: California Licensed Contractor (A, C42) · #456026 (California Contractors State License Board, verify)
Per state license: Installation
Grover Beach 1
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Tierra Construction
1955 Capistrano Ct, Grover Beach, CA 93433
- Licensed: California Licensed Contractor (A, C42) · #765689 (California Contractors State License Board, verify)
Per state license: Installation
Nipomo 1
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Sims Excavating
P.O.Box 2452, Nipomo, CA 93444
- Licensed: California Licensed Contractor (C12, C42) · #887926 (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 San Luis Obispo 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 San Luis Obispo County: common questions
How many licensed septic companies are in San Luis Obispo County, CA?
12 septic companies serve San Luis Obispo County, California, and 12 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 San Luis Obispo County?
2 of the 12 listings in San Luis Obispo 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 San Luis Obispo County?
12 listings in San Luis Obispo 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.