Calstroy, A General Engineering Contractor in Guerneville, CA
Calstroy operating as a sole owner holds an active California contractor license (CSLB #933697), valid through Jun 30, 2027. First issued in 2009, the license has been on the CSLB roster for 17 years. It carries 4 CSLB classifications: A General Engineering Contractor, B General Building Contractor, C-10 Electrical 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 Guerneville, in Sonoma County, California.
- License Number
- 933697
- Issued
- Jun 9, 2009
- Status
- CLEAR
- Expires
- Jun 30, 2027
- Entity
- Sole Owner
- Surety
- American Contractors Indemnity Company
- Bond Number
- 100997683
- Effective
- Sep 26, 2025
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Sep 26, 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 Calstroy licensed in California?
Yes. Calstroy holds California Contractors State License Board license number 933697, which is active and in good standing. The license was first issued on June 9, 2009. It is valid through June 30, 2027.
What does Calstroy specialize in?
Calstroy is licensed for 4 CSLB classifications: A General Engineering Contractor, B General Building Contractor, C-10 Electrical Contractor, and C-36 Plumbing Contractor.
Where is Calstroy headquartered?
Calstroy is headquartered at 14685 Willow Rd, Guerneville, CA 95446, in Sonoma County, California.
Does Calstroy have an active surety bond on file with CSLB?
Yes. Calstroy has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Calstroy carry workers' compensation coverage?
Calstroy reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Calstroy's contractor license?
You can verify Calstroy's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=933697.
- License issuedJun 9, 2009
- Bond activeSep 26, 2025
- WC coverage startsSep 26, 2025
- License expiresJun 30, 2027
- Holden Ralph & CO#307640Healdsburg·A General Engineering Contractor
- Masterson Bryan Enterprises#271933Petaluma·A General Engineering Contractor
- Able Maintenance INC#312844Santa Rosa·A General Engineering Contractor
- Kozy Homes#262090Petaluma·B General Building Contractor
- Curran Environmental Services INC#269122Petaluma·A General Engineering Contractor
- J & J Electric#266927Sebastopol·C-10 Electrical Contractor
- Wiggins Electric INC#290442Santa Rosa·B General Building Contractor
- Brown Mike Electric CO#306767Cotati·A General Engineering Contractor
Working a California job with Calstroy, 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 Calstroy? Claim or correct this profile