Costello's Plumbing, C-36 Plumbing Contractor in San Leandro, CA
Costello's Plumbing operating as a sole owner holds an active California contractor license (CSLB #1018923), valid through Sep 30, 2026. First issued in 2016, the license has been on the CSLB roster for 10 years. It carries a single CSLB classification: C-36 — Plumbing Contractor. Records show an active surety bond on file with Hudson Insurance Company and active workers' compensation coverage from Amtrust Insurance Company. The business is based in San Leandro, in Alameda County, California.
- License Number
- 1018923
- Issued
- Sep 30, 2016
- Status
- CLEAR
- Expires
- Sep 30, 2026
- Entity
- Sole Owner
- Surety
- Hudson Insurance Company
- Bond Number
- 30127711
- Effective
- Aug 16, 2023
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Amtrust Insurance Company
- Policy Number
- SWC1643342
- Effective
- Apr 16, 2026
- Expires
- Apr 16, 2027
This contractor warrants a closer look before contracting:
- License expires in 47 days
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Costello's Plumbing licensed in California?
Yes. Costello's Plumbing holds California Contractors State License Board license number 1018923, which is active and in good standing. The license was first issued on September 30, 2016. It is valid through September 30, 2026.
What does Costello's Plumbing specialize in?
Costello's Plumbing is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Costello's Plumbing headquartered?
Costello's Plumbing is headquartered at 3826 Anza Way, San Leandro, CA 94578, in Alameda County, California.
Does Costello's Plumbing have an active surety bond on file with CSLB?
Yes. Costello's Plumbing has an active California contractor surety bond filed with Hudson Insurance Company.
Does Costello's Plumbing carry workers' compensation coverage?
Yes. Costello's Plumbing carries active workers' compensation coverage through Amtrust Insurance Company.
How do I verify Costello's Plumbing's contractor license?
You can verify Costello's Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1018923.
- License issuedSep 30, 2016
- Bond activeAug 16, 2023
- WC coverage startsApr 16, 2026
- License expiresSep 30, 2026
- WC expiresApr 16, 2027
- Reed Plumbing INC#601931Livermore·C-36 Plumbing Contractor
- Moore Plumbing#599650San Leandro·C-36 Plumbing Contractor
- Home-Pro Construction CO#598466Berkeley·A General Engineering Contractor
- Alliance Solar Services#560667Alameda·B General Building Contractor
- T V P C INC#560039Hayward·C-36 Plumbing Contractor
- Amtech INC#560006Castro Valley·B General Building Contractor
- Lambros Elias Plumbing#561709Castro Valley·C-36 Plumbing Contractor
- Weber A T Plumbing & Mechanical Services INC#562098Alameda·C-4 Boiler, Hot Water Heating and Steam Fitting Contractor
Working a California job with Costello's Plumbing, 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 Costello's Plumbing? Claim or correct this profile