M A S Builders, B General Building Contractor in Novato, CA
M A S Builders operating as a sole owner holds an active California contractor license (CSLB #445273), valid through Aug 31, 2027. First issued in 1983, the license has been on the CSLB roster for 43 years. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with Western Surety Company and active workers' compensation coverage from Amtrust Insurance Company. The business is based in Novato, in Marin County, California.
- License Number
- 445273
- Issued
- Aug 24, 1983
- Status
- CLEAR
- Expires
- Aug 31, 2027
- Entity
- Sole Owner
- Surety
- Western Surety Company
- Bond Number
- 66987693
- Effective
- Jul 1, 2024
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Amtrust Insurance Company
- Policy Number
- QWC1496628
- Effective
- Feb 20, 2026
- Expires
- Oct 8, 2026
This contractor is verified, with no adverse conditions in the current CSLB record.
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is M A S Builders licensed in California?
Yes. M A S Builders holds California Contractors State License Board license number 445273, which is active and in good standing. The license was first issued on August 24, 1983. It is valid through August 31, 2027.
What does M A S Builders specialize in?
M A S Builders is licensed for one CSLB classification: B General Building Contractor.
Where is M A S Builders headquartered?
M A S Builders is headquartered at 154 Hamilton Dr,suite H, Novato, CA 94949, in Marin County, California.
Does M A S Builders have an active surety bond on file with CSLB?
Yes. M A S Builders has an active California contractor surety bond filed with Western Surety Company.
Does M A S Builders carry workers' compensation coverage?
Yes. M A S Builders carries active workers' compensation coverage through Amtrust Insurance Company.
How do I verify M A S Builders's contractor license?
You can verify M A S Builders's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=445273.
- License issuedAug 24, 1983
- Bond activeJul 1, 2024
- WC coverage startsFeb 20, 2026
- WC expiresOct 8, 2026
- License expiresAug 31, 2027
- Quick Connect Electric CO#394146Corte Madera·B General Building Contractor
- Ghilotti Gary Engineering Contractor#395047San Rafael·A General Engineering Contractor
- Charles Melin and Sons INC#311858Novato·B General Building Contractor
- Villasenor Raymond Building Contractor#318200San Rafael·B General Building Contractor
- Mosey Properties, LLC#321693Novato·B General Building Contractor
- Maggiora John Louis#320281Sausalito·B General Building Contractor
- Hoffman Development Company#321268Mill Valley·B General Building Contractor
- Smiley Construction CO#327239Ross·B General Building Contractor
Working a California job with M A S Builders, 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 M A S Builders? Claim or correct this profile