639 CSLB-licensed C-4 contractors statewide.
CSLB classification C-4 (Boiler, Hot Water Heating and Steam Fitting Contractor) is one of the California Contractors State License Board's licensed trades. This directory lists every active C-4 license issued by CSLB — 639 contractors statewide. Each profile shows license status, surety bond, and workers' compensation coverage, sourced directly from the CSLB public dataset.
Showing 101–150 of 639