Mast & Sons Plumbing, C-36 Plumbing Contractor in San Andreas, CA
Mast & Sons Plumbing operating as a partnership holds an active California contractor license (CSLB #1027861), valid through Jun 30, 2027. First issued in 2017, the license has been on the CSLB roster for 9 years. It carries a single CSLB classification: C-36 — Plumbing Contractor. Records show an active surety bond on file with Jet Insurance Company and an exempt workers' compensation status (no employees on payroll). The business is based in San Andreas, in Calaveras County, California.
- License Number
- 1027861
- Issued
- Jun 14, 2017
- Status
- CLEAR
- Expires
- Jun 30, 2027
- Entity
- Partnership
- Surety
- Jet Insurance Company
- Bond Number
- BX0037918
- Effective
- Nov 9, 2023
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Jun 2, 2025
- Expires
- —
This contractor warrants a closer look before contracting:
- Workers' comp listed as exempt
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Mast & Sons Plumbing licensed in California?
Yes. Mast & Sons Plumbing holds California Contractors State License Board license number 1027861, which is active and in good standing. The license was first issued on June 14, 2017. It is valid through June 30, 2027.
What does Mast & Sons Plumbing specialize in?
Mast & Sons Plumbing is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Mast & Sons Plumbing headquartered?
Mast & Sons Plumbing is headquartered at 3670 Mountain Ranch Rd, San Andreas, CA 95249, in Calaveras County, California.
Does Mast & Sons Plumbing have an active surety bond on file with CSLB?
Yes. Mast & Sons Plumbing has an active California contractor surety bond filed with Jet Insurance Company.
Does Mast & Sons Plumbing carry workers' compensation coverage?
Mast & Sons Plumbing reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Mast & Sons Plumbing's contractor license?
You can verify Mast & Sons Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1027861.
- License issuedJun 14, 2017
- Bond activeNov 9, 2023
- WC coverage startsJun 2, 2025
- License expiresJun 30, 2027
- C Yorks Plumbing CO#1020272Arnold·C-36 Plumbing Contractor
- Johnson Bill Plumbing & Construction#1046916Murphys·B General Building Contractor
- Blue Dot Plumbing#987357Arnold·C-36 Plumbing Contractor
- Anrey Plumbing CO#1001490Murphys·C-36 Plumbing Contractor
- R J R Plumbing INC#1007603Valley Springs·C-36 Plumbing Contractor
- Mainline Plumbing Enterprises INC#962419Valley Springs·C-36 Plumbing Contractor
- Jasper Curtis#901174San Andreas·C-36 Plumbing Contractor
- Warner Ron Plumbing#908201Angels Camp·C-36 Plumbing Contractor
Working a California job with Mast & Sons Plumbing, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Mast & Sons Plumbing? Claim or correct this profile