Certified payroll for plumbing subs (C-36) in California
What certified payroll actually looks like in the plumbing trade on California public works, plus live registration activity for the classification.
Data updated 2026-07-01
The plumbing trade's certified payroll reality
Plumber, pipefitter, and landscape or utility pipeline classifications sit close together and pay differently, and public works plumbing scope drifts across them constantly: the same crew can set fixtures, run process pipe, and tie in a site main in one week. Book hours to the craft actually performed, not the license on the truck. Plumbing determinations typically carry large plan-paid fringe packages, which means section 4(a) treatment on the WH-347 and hourly fringe figures on the eCPR need to reconcile with your trust statements. School and healthcare work adds another wrinkle: multi-year projects usually span at least one predetermined rate increase, and the week it lands is the week your filings have to show it.
Whatever the craft mix, the mechanics are the same statewide: rates come from the project county's published determination (DIR lookup), the eCPR goes directly to DIR on non-exempt projects, and the federal WH-347 rides along weekly where federal funds apply. The full picture is in the complete guide.
Where plumbing public works is registering right now
From DIR's public PWC-100 registrations matched to CSLB license records: C-36-classified contractors newly listed on public works projects, by home county and by awarding body.
By contractor county
- Orange County: 12
- Los Angeles County: 11
- Santa Clara County: 4
- Sacramento County: 2
- San Bernardino County: 2
- San Diego County: 2
By awarding body
- Port of Long Beach: 2 listings
- University of California - Irvine: 2 listings
- Pomona Unified School District: 2 listings
- Palmdale School District: 2 listings
- Los Gatos-Saratoga Joint Union High School District: 2 listings
- County of Orange/OC Public Works: 2 listings