Mark Lansdown Construction, B General Building Contractor in Sierra Madre, CA
Mark Lansdown Construction operating as a sole owner holds an active California contractor license (CSLB #621009), valid through Mar 31, 2028. First issued in 1991, the license has been on the CSLB roster for 35 years. 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 Sierra Madre, in Los Angeles County, California.
- License Number
- 621009
- Issued
- May 29, 1991
- Status
- CLEAR
- Expires
- Mar 31, 2028
- Entity
- Sole Owner
- Surety
- American Contractors Indemnity Company
- Bond Number
- 101038448
- Effective
- Feb 20, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Feb 18, 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 Mark Lansdown Construction licensed in California?
Yes. Mark Lansdown Construction holds California Contractors State License Board license number 621009, which is active and in good standing. The license was first issued on May 29, 1991. It is valid through March 31, 2028.
What does Mark Lansdown Construction specialize in?
Mark Lansdown Construction is licensed for one CSLB classification: B General Building Contractor.
Where is Mark Lansdown Construction headquartered?
Mark Lansdown Construction is headquartered at 249 Ramona, Sierra Madre, CA 91024, in Los Angeles County, California.
Does Mark Lansdown Construction have an active surety bond on file with CSLB?
Yes. Mark Lansdown Construction has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Mark Lansdown Construction carry workers' compensation coverage?
Mark Lansdown Construction reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Mark Lansdown Construction's contractor license?
You can verify Mark Lansdown Construction's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=621009.
- License issuedMay 29, 1991
- WC coverage startsFeb 18, 2026
- Bond activeFeb 20, 2026
- License expiresMar 31, 2028
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