California contractor licence #418358

J F O'sullivan Construction

J F O'sullivan Construction holds California contractor licence 418358 (General Building) in Novato, Marin County. Status: Active · expires Jan 31, 2027.

Activelicence status

2027-01expires Jan 31, 2027

$25,000contractor's bond

Insuredworkers' comp

What this means

The licence is active: CSLB lists its status as clear. That means no suspension is on file; it does not rate the quality of the work.
It expires in 85 days (Jan 31, 2027). California licences renew every two years; work done after expiry without renewal is unlicensed.
Contractor's bond: $25,000 with Western Surety Company. The bond is there to pay consumers and workers harmed by licence-law violations; it is not liability insurance and it does not guarantee the work.
Workers' comp: Workers' Compensation Insurance with American Casualty Company Of Reading Pa, policy through Jul 5, 2027.

Watch this licence: $9/month. We email you when CSLB's file shows a change to this licence's status, bond, workers' comp or expiry. Checked every Monday and Thursday. Cancel any time.

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Licence details

Licence number	418358
Business name (as CSLB lists it)	O'SULLIVAN J F CONSTRUCTION
Business type	Sole Owner
Status	Active
Issued	Feb 18, 1982
Reissued	Jan 29, 2021
Expires	Jan 31, 2027
City / county / ZIP	Novato / Marin / 94947
Contractor's bond surety	Western Surety Company
Bond amount	$25,000
Bond number	67189481
Bond effective	Jan 25, 2025
Workers' comp	Workers' Compensation Insurance
Workers' comp insurer	American Casualty Company Of Reading Pa
Workers' comp effective	Jul 5, 2026
Workers' comp expires	Jul 5, 2027
CSLB record last updated	Jul 10, 2026

Classifications

B General Building: framing and building whole structures, and projects that involve two or more unrelated trades · other general building contractors in Novato

Change history

Jul 5, 2026Current workers' comp record took effect
Jan 25, 2025Current contractor's bond took effect (Western Surety Company)
Jan 29, 2021Licence reactivated
Jan 29, 2021Licence reissued
Mar 1, 1992Licence inactivated
Feb 18, 1982Licence issued

Changes come from comparing successive copies of CSLB's public licence master file (refreshed twice a week) since October 2026, plus the dates printed on the current record.

Need a bond or workers' comp quote?

If this is your licence and you need a contractor's bond, a replacement bond or workers' comp, request quotes from licensed providers. Free, no obligation.

Check the official record (free): CSLB licence 418358 on cslb.ca.gov. Always confirm there before you hire or sign.

Rasengan Data is a private service, not CSLB. This page is built from the public CSLB licence master file as published; it may lag the live CSLB record by a few days. Not legal advice. Is this your licence and something looks wrong? CSLB's record is the source; email rasengan.win@gmail.com about this page.