O'sullivan D F Construction, B General Building Contractor in Novato, CA
O'sullivan D F Construction operating as a sole owner holds an active California contractor license (CSLB #506132), valid through Feb 28, 2027. First issued in 1987, the license has been on the CSLB roster for 39 years. It carries a single CSLB classification: B — General Building Contractor. Records show a previously-filed surety bond from Merchants Bonding Company (mutual) that is no longer active and an exempt workers' compensation status (no employees on payroll). The business is based in Novato, in Marin County, California.
- License Number
- 506132
- Issued
- Feb 24, 1987
- Status
- CLEAR
- Expires
- Feb 28, 2027
- Entity
- Sole Owner
- Surety
- Merchants Bonding Company (mutual)
- Bond Number
- 101405715
- Effective
- Feb 28, 2025
- Status
- Cancelled
- Cancelled
- May 3, 2026
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Feb 7, 2025
- Expires
- —
This contractor has a compliance issue in its public CSLB record:
- Contractor bond cancelled
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is O'sullivan D F Construction licensed in California?
Yes. O'sullivan D F Construction holds California Contractors State License Board license number 506132, which is active and in good standing. The license was first issued on February 24, 1987. It is valid through February 28, 2027.
What does O'sullivan D F Construction specialize in?
O'sullivan D F Construction is licensed for one CSLB classification: B General Building Contractor.
Where is O'sullivan D F Construction headquartered?
O'sullivan D F Construction is headquartered at P O Box 1092, Novato, CA 949481092, in Marin County, California.
Does O'sullivan D F Construction have an active surety bond on file with CSLB?
O'sullivan D F Construction has a previously-filed surety bond from Merchants Bonding Company (mutual) that is no longer active.
Does O'sullivan D F Construction carry workers' compensation coverage?
O'sullivan D F Construction reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify O'sullivan D F Construction's contractor license?
You can verify O'sullivan D F Construction's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=506132.
- License issuedFeb 24, 1987
- WC coverage startsFeb 7, 2025
- Bond activeFeb 28, 2025
- Bond cancelledMay 3, 2026
- License expiresFeb 28, 2027
- Flanagan James Builder#395345Novato·B General Building Contractor
- Plath & Company INC#395458San Rafael·B General Building Contractor
- Quick Connect Electric CO#394146Corte Madera·B General Building Contractor
- Ghilotti Gary Engineering Contractor#395047San Rafael·A General Engineering Contractor
- Collins Aidan & Sons INC#375498San Rafael·B General Building Contractor
- Apperson Jesse W General Contractor#376220Novato·B General Building Contractor
- Wingers Erection CO#376009Mill Valley·B General Building Contractor
- Clark Christopher Contracting INC#373692Novato·B General Building Contractor
Working a California job with O'sullivan D F 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 O'sullivan D F Construction? Claim or correct this profile