Welton Building & Design, B General Building Contractor in Alamo, CA
Welton Building & Design operating as a corporation holds an active California contractor license (CSLB #1148797), valid through Jan 31, 2028. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with American Contractors Indemnity Company and an exempt workers' compensation status (no employees on payroll). The business is based in Alamo, in Contra Costa County, California.
- License Number
- 1148797
- Issued
- Jan 8, 2026
- Status
- CLEAR
- Expires
- Jan 31, 2028
- Entity
- Corporation
- Surety
- American Contractors Indemnity Company
- Bond Number
- 101023252
- Effective
- Dec 31, 2025
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Dec 31, 2025
- Expires
- —
Recently licensed: the CSLB license is active and in good standing, issued within the last 2 years.
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Welton Building & Design licensed in California?
Yes. Welton Building & Design holds California Contractors State License Board license number 1148797, which is active and in good standing. The license was first issued on January 8, 2026. It is valid through January 31, 2028.
What does Welton Building & Design specialize in?
Welton Building & Design is licensed for one CSLB classification: B General Building Contractor.
Where is Welton Building & Design headquartered?
Welton Building & Design is headquartered at 170 Erselia Trl, Alamo, CA 94507, in Contra Costa County, California.
Does Welton Building & Design have an active surety bond on file with CSLB?
Yes. Welton Building & Design has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Welton Building & Design carry workers' compensation coverage?
Welton Building & Design reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Welton Building & Design's contractor license?
You can verify Welton Building & Design's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1148797.
- Bond activeDec 31, 2025
- WC coverage startsDec 31, 2025
- License issuedJan 8, 2026
- License expiresJan 31, 2028
- Overaa C & CO#106793Richmond·A General Engineering Contractor
- Swinerton Builders#92Concord·A General Engineering Contractor
- Doyle Michael J#240251Danville·B General Building Contractor
- Parshall Construction#242928Danville·B General Building Contractor
- American Refrigerant Services INC#246018Concord·B General Building Contractor
- Lescure Company INC#248204Concord·A General Engineering Contractor
- S J N Construction#250677Discovery Bay·B General Building Contractor
- Siino Joseph S#254915Pittsburg·B General Building Contractor
Working a California job with Welton Building & Design, 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 Welton Building & Design? Claim or correct this profile