What insurance does a C-31 contractor need?

Workers' compensation is required by law once they have employees; the CSLB suspends a licence without it. Beyond that, producers usually place: Workers' comp; General liability; Commercial auto.

How many C-31 contractors are there in California?

461 active licences hold the C-31 classification as of 2026-09-06; 360 (78%) have workers' comp on file and 77 are exempt.

When do C-31 workers' comp policies renew?

81 renew within 90 days. January is the peak month.

Which WCIRB class codes apply to C-31 work?

Most often 5506 (Street or road construction). The WCIRB assigns the class from the actual operations and payroll, so verify per account in the WCIRB classification search.

CSLB classification · Earthwork/Paving

C-31 Construction Zone Traffic Control Contractor

Name: C-31 Construction Zone Traffic Control Contractor: California licence and insurance statistics
Creator: Birdray
License: https://creativecommons.org/licenses/by/4.0/

Sets up and manages traffic control around work zones.

461

Active licences

360

With workers' comp

78%

Renewing in 90 days

Lapsed or suspended

Exempt

New in 90 days

Coverages a producer should expect

›Workers' comp
›General liability
›Commercial auto

WCIRB classes usually assigned

5506 Street or road construction

Governing class depends on actual operations and payroll. Verify with the WCIRB classification search before quoting.

Carriers writing this class

Policies on file, statewide

C-31 workers' comp renewals by month, California

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Counties with the most

Related classes in Earthwork/Paving

C-12 Earthwork and Paving Contractor C-32 Parking and Highway Improvement Contractor D-56 Trenching Only

Frequently asked

What does a C-31 licence allow a contractor to do?: Sets up and manages traffic control around work zones.
What insurance does a C-31 contractor need?: Workers' compensation is required by law once they have employees; the CSLB suspends a licence without it. Beyond that, producers usually place: Workers' comp; General liability; Commercial auto.
How many C-31 contractors are there in California?: 461 active licences hold the C-31 classification as of 2026-09-06; 360 (78%) have workers' comp on file and 77 are exempt.
When do C-31 workers' comp policies renew?: 81 renew within 90 days. January is the peak month.
Which WCIRB class codes apply to C-31 work?: Most often 5506 (Street or road construction). The WCIRB assigns the class from the actual operations and payroll, so verify per account in the WCIRB classification search.

Selling to C-31 contractors in California?

Birdray runs signal-timed outbound for one agency per territory: the companies behind these numbers, the person to email, and the renewal date, sent from your inbox. The database is free to search.

How the outbound works Search free

Sources: CSLB licence and workers' compensation records, California Secretary of State, OSHA, FMCSA, county permits. Aggregates only; no individual contractor appears on this page. "Active" means a CLEAR licence status. Renewal counts include policies on file with the CSLB expiring in the window. Refreshed weekly; this page as of 2026-09-06. Every field and its source →