Same county and trade, ranked by permits in the last 3 years
Questions & answers
Is Black Diamond Waterproofing licensed?
CSLB license #1005043 is active, issued Jun 30, 2015 and valid through Jun 30, 2027, with classes C-39.
Is Black Diamond Waterproofing insured and bonded?
CSLB lists workers' compensation insurance with Endurance Assurance Corporation until Aug 10, 2027 and a $25,000 contractor bond with American Contractors Indemnity Company.
Sources
Contractors State License Board — license, bond and workers' comp records (Aug 10, 2026).