Quantum Mechanical of Sonoma County INC, B General Building Contractor in Santa Rosa, CA
Quantum Mechanical of Sonoma County INC operating as a corporation holds an active California contractor license (CSLB #731245), valid through Mar 31, 2027. First issued in 1997, the license has been on the CSLB roster for 29 years. It carries 3 CSLB classifications: B General Building Contractor, C-16 Fire Protection Contractor, and C-36 Plumbing Contractor. Records show an active surety bond on file with American Contractors Indemnity Company and an exempt workers' compensation status (no employees on payroll). The business is based in Santa Rosa, in Sonoma County, California.
- License Number
- 731245
- Issued
- Jan 10, 1997
- Status
- CLEAR
- Expires
- Mar 31, 2027
- Entity
- Corporation
- Surety
- American Contractors Indemnity Company
- Bond Number
- 10115644
- Effective
- Jan 1, 2023
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Mar 13, 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 Quantum Mechanical of Sonoma County INC licensed in California?
Yes. Quantum Mechanical of Sonoma County INC holds California Contractors State License Board license number 731245, which is active and in good standing. The license was first issued on January 10, 1997. It is valid through March 31, 2027.
What does Quantum Mechanical of Sonoma County INC specialize in?
Quantum Mechanical of Sonoma County INC is licensed for 3 CSLB classifications: B General Building Contractor, C-16 Fire Protection Contractor, and C-36 Plumbing Contractor.
Where is Quantum Mechanical of Sonoma County INC headquartered?
Quantum Mechanical of Sonoma County INC is headquartered at 4945 Grange Rd, Santa Rosa, CA 95404, in Sonoma County, California.
Does Quantum Mechanical of Sonoma County INC have an active surety bond on file with CSLB?
Yes. Quantum Mechanical of Sonoma County INC has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Quantum Mechanical of Sonoma County INC carry workers' compensation coverage?
Quantum Mechanical of Sonoma County INC reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Quantum Mechanical of Sonoma County INC's contractor license?
You can verify Quantum Mechanical of Sonoma County INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=731245.
- License issuedJan 10, 1997
- Bond activeJan 1, 2023
- WC coverage startsMar 13, 2025
- License expiresMar 31, 2027
- Masterson Bryan Enterprises#271933Petaluma·A General Engineering Contractor
- Holden Ralph & CO#307640Healdsburg·A General Engineering Contractor
- Eddinger Enterprises INC#301487Healdsburg·B General Building Contractor
- Ongaro & Sons#215233Petaluma·C-4 Boiler, Hot Water Heating and Steam Fitting Contractor
- Kozy Homes#262090Petaluma·B General Building Contractor
- C B S Plumbing & Heating INC#294171Santa Rosa·C-4 Boiler, Hot Water Heating and Steam Fitting Contractor
- Codding Construction CO#203301Santa Rosa·B General Building Contractor
- Railla Joseph J#201956Sebastopol·B General Building Contractor
Working a California job with Quantum Mechanical of Sonoma County INC, 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 Quantum Mechanical of Sonoma County INC? Claim or correct this profile