Diablo Mountain Construction LLC

Castro Valley · Alameda County

Active license, no suspensions or flags in the state's file.

Disciplinary history (citations and accusations) is on the state's license page, linked below.

License: #1101794
Status: Active
Classes: B General building contractor
Business type: Limited Liability
Issued: Feb 23, 2023
Expires: Feb 28, 2027

From the CSLB license file as of Nov 8, 2026. See this license on CSLB.ca.gov for its disciplinary history and to confirm before you hire.

Bond and insurance

Contractor's bond: $25,000 with Atlantic Specialty Insurance Company, since Sep 1, 2026
Employee/worker bond: $100,000 with Atlantic Specialty Insurance Company
Workers' comp: Exempt: the holder certified the business has no employees.

People on this license

Zachary Dang Boelsterli, responsible managing member (since 2023)

The qualifier (RME or RMO) is the person whose experience the license is based on. Ask who will supervise your job.

Related licenses

Other licenses in Alameda County listing someone with the same name. Names can be shared by different people.

Zachary Boelsterli (#1077803), active: Zachary Dang Boelsterli

Something wrong? This page mirrors the state's records and updates within a week of the state's file. For corrections, contact the CSLB or email admin@californiacontractorlookup.com.

Other general building contractors in Castro Valley

Active licenses with no suspensions or flags on file. See all of them.