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California contractor license

C3 Sewer & Drains

C3 Sewer & Drains of Lakeside holds California license 1144527 (A General Engineering, C36 Plumbing). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Oct 31, 2027.

Doing business as C3 Civil.

Active

C3 Sewer & Drains, Lakeside

License
1144527
Class
A General Engineering; C36 Plumbing
Expires
Oct 31, 2027
Bond
$25,000
Workers' comp
Insured to Jun 25, 2027

CSLB file dated Oct 30, 2026

From the CSLB file dated Oct 30, 2026. Not a consumer report; check the board before you hire.

Has the board taken action on this license?

None in the CSLB file dated Oct 30, 2026. Confirm with the board: CSLB license check

What bond, insurance and workers' comp are on file?

Bond
$25,000Business Alliance Insurance Company, from Sep 24, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from Jun 25, 2026, to Jun 25, 2027

Who is on this license?

Officer
Bridget R. CastroSince Oct 3, 2025
Officer
Maria E. CastroSince Oct 3, 2025
Responsible managing officer, CEO and president
Kenyon J. CastroSince Oct 3, 2025

What work does this license cover?

Issued Oct 3, 2025.

Which other Lakeside businesses hold A General Engineering?

California plumbing contractorsGeneral Contractors in LakesideCalifornia general contractors

What should you check before hiring?

What to ask before you hire

  1. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  2. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  3. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  4. Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
  5. Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

  1. Don't sign or pay a deposit until the CSLB shows the license active again.
  2. Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
  4. Check another contractor. California license lookup

Sources

  1. CSLB License Master (cslb.ca.gov, Oct 30, 2026)
  2. Contractors State License Board (CSLB)