Warren Duncan Contracting
Warren Duncan Contracting holds California contractor licence 553327 (General Engineering, Building Moving and Demolition, Service Station Equipment and Maintenance, Hazardous Substance Removal) in San Bernardino, San Bernardino County. Status: Active · expires Jan 31, 2027.
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 American Contractors Indemnity 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 State Compensation Insurance Fund, policy through Jan 1, 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.
Watch this licenceLicence details
| Licence number | 553327 |
|---|---|
| Business name (as CSLB lists it) | DUNCAN WARREN CONTRACTING |
| Business type | Sole Owner |
| Status | Active |
| Issued | Jan 10, 1989 |
| Expires | Jan 31, 2027 |
| City / county / ZIP | San Bernardino / San Bernardino / 92407 |
| Contractor's bond surety | American Contractors Indemnity Company |
| Bond amount | $25,000 |
| Bond number | 9015608 |
| Bond effective | Jan 1, 2023 |
| Workers' comp | Workers' Compensation Insurance |
| Workers' comp insurer | State Compensation Insurance Fund |
| Workers' comp effective | Jan 1, 2021 |
| Workers' comp expires | Jan 1, 2027 |
| CSLB record last updated | Dec 18, 2025 |
Classifications
- A General Engineering: roads, grading, sewers, pipelines, bridges and similar engineering projects · other general engineering contractors in San Bernardino
- C-21 Building Moving and Demolition: demolition and building moving · other building moving and demolition contractors in San Bernardino
- D-40 Service Station Equipment and Maintenance
- HAZ Hazardous Substance Removal: removal of hazardous substances (a certification, not a licence class)
Change history
- Current contractor's bond took effect (American Contractors Indemnity Company)
- Current workers' comp record took effect
- Licence 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 553327 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.