Ernst Duane Construction, B General Building Contractor in San Francisco, CA
Ernst Duane Construction operating as a sole owner holds an active California contractor license (CSLB #883911), valid through Dec 31, 2027. First issued in 2006, the license has been on the CSLB roster for 20 years. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with Western Surety Company and an exempt workers' compensation status (no employees on payroll). The business is based in San Francisco, in San Francisco County, California.
- License Number
- 883911
- Issued
- Sep 11, 2006
- Status
- CLEAR
- Expires
- Dec 31, 2027
- Entity
- Sole Owner
- Surety
- Western Surety Company
- Bond Number
- 66623588
- Effective
- May 14, 2023
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Nov 15, 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 Ernst Duane Construction licensed in California?
Yes. Ernst Duane Construction holds California Contractors State License Board license number 883911, which is active and in good standing. The license was first issued on September 11, 2006. It is valid through December 31, 2027.
What does Ernst Duane Construction specialize in?
Ernst Duane Construction is licensed for one CSLB classification: B General Building Contractor.
Where is Ernst Duane Construction headquartered?
Ernst Duane Construction is headquartered at 119 Germania Street, San Francisco, CA 94117, in San Francisco County, California.
Does Ernst Duane Construction have an active surety bond on file with CSLB?
Yes. Ernst Duane Construction has an active California contractor surety bond filed with Western Surety Company.
Does Ernst Duane Construction carry workers' compensation coverage?
Ernst Duane Construction reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Ernst Duane Construction's contractor license?
You can verify Ernst Duane Construction's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=883911.
- License issuedSep 11, 2006
- Bond activeMay 14, 2023
- WC coverage startsNov 15, 2025
- License expiresDec 31, 2027
- Rotoco#356608San Francisco·B General Building Contractor
- Carolina Construction Company#355639San Francisco·B General Building Contractor
- Keaney Patrick Construction#353351San Francisco·B General Building Contractor
- Coleman B & Son#354080San Francisco·B General Building Contractor
- Standard Roofing Company#348544San Francisco·B General Building Contractor
- Allen Jonathan B#347314San Francisco·B General Building Contractor
- Mesa Construction#347888San Francisco·B General Building Contractor
- O'brien Frank J#343837San Francisco·B General Building Contractor
Working a California job with Ernst Duane Construction, 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 Ernst Duane Construction? Claim or correct this profile