Walsh Construction CO, B General Building Contractor in Alamo, CA
Walsh Construction CO operating as a sole owner holds an active California contractor license (CSLB #637836), valid through Feb 29, 2028. First issued in 1992, the license has been on the CSLB roster for 34 years. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with Philadelphia Indemnity Insurance Company and an exempt workers' compensation status (no employees on payroll). The business is based in Alamo, in Contra Costa County, California.
- License Number
- 637836
- Issued
- Feb 12, 1992
- Status
- CLEAR
- Expires
- Feb 29, 2028
- Entity
- Sole Owner
- Surety
- Philadelphia Indemnity Insurance Company
- Bond Number
- PB10163408443
- Effective
- Feb 18, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Feb 12, 2026
- Expires
- —
This contractor warrants a closer look before contracting:
- Workers' comp listed as exempt
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Walsh Construction CO licensed in California?
Yes. Walsh Construction CO holds California Contractors State License Board license number 637836, which is active and in good standing. The license was first issued on February 12, 1992. It is valid through February 29, 2028.
What does Walsh Construction CO specialize in?
Walsh Construction CO is licensed for one CSLB classification: B General Building Contractor.
Where is Walsh Construction CO headquartered?
Walsh Construction CO is headquartered at 9 Bolla Avenue, Alamo, CA 94507, in Contra Costa County, California.
Does Walsh Construction CO have an active surety bond on file with CSLB?
Yes. Walsh Construction CO has an active California contractor surety bond filed with Philadelphia Indemnity Insurance Company.
Does Walsh Construction CO carry workers' compensation coverage?
Walsh Construction CO reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Walsh Construction CO's contractor license?
You can verify Walsh Construction CO's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=637836.
- License issuedFeb 12, 1992
- WC coverage startsFeb 12, 2026
- Bond activeFeb 18, 2026
- License expiresFeb 29, 2028
- Overaa C & CO#106793Richmond·A General Engineering Contractor
- Swinerton Builders#92Concord·A General Engineering Contractor
- Parshall Construction#242928Danville·B General Building Contractor
- Doyle Michael J#240251Danville·B General Building Contractor
- Seeno Albert D Construction CO#260260Concord·A General Engineering Contractor
- Siino Joseph S#254915Pittsburg·B General Building Contractor
- Busby James J#255487Concord·A General Engineering Contractor
- S J N Construction#250677Discovery Bay·B General Building Contractor
Working a California job with Walsh Construction CO, 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 Walsh Construction CO? Claim or correct this profile