Mark Collins Plumbing
Mark Collins Plumbing holds California contractor licence 887634 (Plumbing) in Pittsburg, Contra Costa County. Status: Active · expires Nov 30, 2026.
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 23 days (Nov 30, 2026). 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: exempt. The contractor has told CSLB it has no employees. If a crew shows up on your job, ask for a current workers' comp certificate; a contractor with employees must carry workers' comp.
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 | 887634 |
|---|---|
| Business name (as CSLB lists it) | COLLINS MARK PLUMBING |
| Business type | Sole Owner |
| Status | Active |
| Issued | Nov 27, 2006 |
| Expires | Nov 30, 2026 |
| City / county / ZIP | Pittsburg / Contra Costa / 94565 |
| Contractor's bond surety | Western Surety Company |
| Bond amount | $25,000 |
| Bond number | 66879956 |
| Bond effective | Jan 27, 2024 |
| Workers' comp | Exempt |
| Workers' comp effective | Feb 1, 2025 |
| CSLB record last updated | Sep 22, 2026 |
Classifications
- C-36 Plumbing: water, gas and drain lines, fixtures and water heaters · other plumbing contractors in Pittsburg
Change history
- Current contractor's bond took effect (Western Surety Company)
- 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 887634 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.