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California contractor license
Sierra Septic Service & Supply Co
Sierra Septic Service & Supply Co of Newcastle holds California license 417533 (A General Engineering, C36 Plumbing, C42 Sanitation System). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Nov 30, 2027.
Licensed 44 years, longer than 95% of 9,564 active California plumbing contractors.
Active
Sierra Septic Service & Supply Co, Newcastle
- License
- 417533
- Class
- A General Engineering; C36 Plumbing; C42 Sanitation System
- Expires
- Nov 30, 2027
- Bond
- $25,000
- Workers' comp
- Insured to Jan 1, 2027
CSLB file dated Nov 1, 2026
From the CSLB file dated Nov 1, 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 Nov 1, 2026. Confirm with the board: CSLB license check
What bond, insurance and workers' comp are on file?
- Bond
- $25,000Nationwide Mutual Insurance Company, from Nov 13, 2025, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredState Compensation Insurance Fund, from Jan 1, 2026, to Jan 1, 2027
Who is on this license?
- Officer
- Heather L. BukerSince Nov 13, 2025
- Responsible managing officer, CEO and president
- Guy L. OstensonSince Jan 29, 1982
What work does this license cover?
Issued Jan 29, 1982. Reissued Nov 13, 2025.
- A General Engineering
- C36 Plumbing
- C42 Sanitation System
Which other Newcastle businesses hold A General Engineering?
- Mendez Gabe IncLicensed since 1974
- Baldoni Construction Service Inc A California CorporationLicensed since 1980
- Abc Builders GroupLicensed since 1990
- Westcon Construction CorpLicensed since 1995
- Long C M General Contractors IncLicensed since 1998
California plumbing contractorsCalifornia general contractors
What should you check before hiring?
What to ask before you hire
- Get the license number in writing. The name on the license should match the name on your contract and invoice.
- Check the class covers the job. A license for one trade doesn't cover another. California license classes
- Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
- 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.
- 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
- Don't sign or pay a deposit until the CSLB shows the license active again.
- 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.
- If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
- Check another contractor. California license lookup
Sources
- CSLB License Master (cslb.ca.gov, Nov 1, 2026)
- Contractors State License Board (CSLB)