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Licensed Septic and Sanitation Contractors in Oakland, California

Updated November 1, 2026 from CSLB's public license file · C-42 Sanitation System Contractor

  • 28licensed septic and sanitation contractors
  • 26active (Clear)
  • 7.1%with a suspension
  • 32.1%workers' comp exempt
  • 11 yrsmedian time licensed
  • 67.9%corp / LLC / partnership (32.1% sole owner)
  • 2new in the last 12 months
  • —change tracking began November 1, 2026

There are 28 septic and sanitation contractors based in Oakland in CSLB's current file. 26 (92.9%) have a Clear status as of November 1, 2026.

The share with a suspension, 7.1%, is 1.9 points higher than the Alameda County rate for the same license (5.2%). 32.1% report a workers' comp exemption, 2.9 points lower than the statewide figure for septic and sanitation contractors (35%), so many of these businesses say they have no employees.

Experience varies: 57.1% have been licensed 10+ years and 2 are new this year (median 11 years, vs 20.6 statewide).

In California this work generally calls for the C-42 Sanitation System Contractor license (or a B license when it is part of a larger multi-trade job). See the C-42 Sanitation System Contractor guide for what the license covers.

How to check a septic contractor's license in Oakland

  1. Look the company up by name or license number (search Oakland). On the profile, confirm three things: Clear status, the C-42 license for this kind of work, and a contractor's bond on file.
  2. Re-check the same number on CSLB's Instant License Check the day you sign; our copy is refreshed weekly and 7.1% of Oakland listings here already show a suspension.
  3. Match the license holder's name to the name on the written contract and the person you meet. Ask for proof of workers' comp if anyone besides the owner will work on site. Hiring checklist.

All 28 septic and sanitation contractors in Oakland

Oakland septic and sanitation contractors sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed septic and sanitation contractors in Oakland
Business nameLicense #StatusYearsWorkers' compBond
Monterey Mechanical CO 388361 Clear 46 Insured On file
Mr Rooter Plumbing 453536 Clear 42 Insured On file
Broadway Mechanical - Contractors INC 584263 Clear 36 Insured On file
Knox Sewer and Backhoe Service INC 659212 Clear 33 Insured On file
Precision Sewers 707251 Clear 31 Exempt On file
Emergency Rooter 729165 Clear 30 Insured On file
Williams Underground Construction INC 787857 Clear 25 Insured On file
Clark Harry Plumbing and Heating INC 792463 Clear 25 Insured On file
Ehret CO Plumbing 834005 Clear 22 Insured On file
Ha Hien 963171 Clear 15 Exempt On file
P J Plumbing INC 992574 Clear 12 Insured On file
Toto's Plumbing INC 1001580 Clear 11 Insured On file
Larrieta Sanitation Construction 1007540 Clear 11 Insured On file
Eco Sewers & Drains Plumbing 1009599 Clear 10 Exempt On file
Elden Plumbing INC 1015348 Clear 10 Insured On file
Rays Service One Plumbing 1022293 Clear 9 Exempt On file
Economy Rooter & Plumbing INC 1039625 Clear 8 Insured On file
Warriors Plumbing 1040009 Clear 8 Insured On file
Cutter Sewer and Sanitation Systems 1042487 Clear 8 Exempt On file
Rooter Solutions of California INC 1045663 Clear 8 Exempt On file
Underground Rooter 1076659 Clear 5 Insured On file
Lio Rooter Company 1090286 Clear 4 Insured On file
A-1 Bay Area Rooter & Plumbing 1116691 Clear 2 Insured On file
East Bay Sewer INC 1135344 Clear 1 Insured On file
Mg Rooter INC 1146516 Clear 1 Exempt On file
Rp Sanitation Systems 1154299 Clear <1 Exempt On file
Challenge Rooter 1008865 Susp: judgment against related entity 11 Insured On file
Cal Bay Plumbing 1026533 Susp: contractor's bond 9 Exempt On file

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed septic and sanitation contractors are in Oakland?

CSLB's current public file lists 28 septic and sanitation contractors with a Oakland mailing address. 26 have a Clear status, and 92.9% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a septic contractor need in California?

In California this work generally calls for the C-42 Sanitation System Contractor license (or a B license when it is part of a larger multi-trade job). Any job of $1,000 or more in labor and materials needs a licensed contractor. Read our guide to the $1,000 rule.

How do I check a septic contractor's workers' comp?

Open the contractor's profile here to see the workers' comp type and insurer from CSLB's file. In Oakland, 67.9% of septic and sanitation contractors list a policy, 32.1% claim an exemption and 0% show no current coverage. Confirm the policy with CSLB's workers' comp search before work starts. How to check workers' comp.

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