What types of certifications/licenses are required for Septic System Contractors?
Septic System Contractors or “Registered Installers” must possess a State of California Contractor’s license (Type A, B, C-36 or C-42) to construct, enlarge, alter, repair, improve or replace an individual system, or many of the components of an individual system. A registered installer doing business in Contra Costa County must have current verification of worker’s compensation insurance on file with the Department if any employees work on system construction.
