Lifeng Si, B General Building Contractor in Walnut, CA
Lifeng Si operating as a sole owner holds an active California contractor license (CSLB #1143803), valid through Sep 30, 2027. First issued in 2025, the license has been on the CSLB roster for 1 year. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with Western Surety Company and an exempt workers' compensation status (no employees on payroll). The business is based in Walnut, in Los Angeles County, California.
- License Number
- 1143803
- Issued
- Sep 19, 2025
- Status
- CLEAR
- Expires
- Sep 30, 2027
- Entity
- Sole Owner
- Surety
- Western Surety Company
- Bond Number
- 67597310
- Effective
- Aug 19, 2025
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Sep 4, 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 Lifeng Si licensed in California?
Yes. Lifeng Si holds California Contractors State License Board license number 1143803, which is active and in good standing. The license was first issued on September 19, 2025. It is valid through September 30, 2027.
What does Lifeng Si specialize in?
Lifeng Si is licensed for one CSLB classification: B General Building Contractor.
Where is Lifeng Si headquartered?
Lifeng Si is headquartered at 21035 Gacel Ct, Walnut, CA 91789, in Los Angeles County, California.
Does Lifeng Si have an active surety bond on file with CSLB?
Yes. Lifeng Si has an active California contractor surety bond filed with Western Surety Company.
Does Lifeng Si carry workers' compensation coverage?
Lifeng Si reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Lifeng Si's contractor license?
You can verify Lifeng Si's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1143803.
- Bond activeAug 19, 2025
- WC coverage startsSep 4, 2025
- License issuedSep 19, 2025
- License expiresSep 30, 2027
- Cyber Construction INC#1118573Northridge·A General Engineering Contractor
- Electro Construction CORP#95881Altadena·B General Building Contractor
- Tutor Perini Corporation#92072Sylmar·A General Engineering Contractor
- Oltmans Construction CO#86393Whittier·A General Engineering Contractor
- Stanhope Company#127649Azusa·B General Building Contractor
- Folb Stanley#128634Hollywood·B General Building Contractor
- Cowelco#123129Long Beach·B General Building Contractor
- Acco Engineered Systems#120696Pasadena·A General Engineering Contractor
Working a California job with Lifeng Si, 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 Lifeng Si? Claim or correct this profile