Birdray

CSLB classification · Specialty

D-34 Prefabricated Equipment

Installs prefabricated equipment.

1,363
Active licences
928
With workers' comp
68%
224
Renewing in 90 days
54
Lapsed or suspended
368
Exempt
12
New in 90 days

Coverages a producer should expect

  • ›Workers' comp
  • ›General liability

WCIRB classes usually assigned

Assigned from the specific operations; no single governing class.

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

Carriers writing this class

Policies on file, statewide

  1. State Compensation Insurance Fund139
  2. Hartford Casualty Insurance Co.51
  3. Insurance Co. Of The West48
  4. Pie Insurance Co.46
  5. Technology Insurance Co. Inc39
  6. Security National Insurance Co.36
  7. Omaha National Casualty Co.35
  8. Travelers Property Casualty Co. Of America35
  9. Zurich American Insurance Co.24
  10. Endurance Assurance Corporation18

D-34 workers' comp renewals by month, California

41
Sep
101
Oct
55
Nov
63
Dec
124
Jan
60
Feb
63
Mar
90
Apr
55
May
83
Jun
85
Jul
44
Aug
4
Sep

Counties with the most

  1. Los Angeles County180
  2. County152
  3. San Diego County144
  4. Orange County132
  5. Riverside County85
  6. San Bernardino County75
  7. Alameda County67
  8. Sacramento County62
  9. Santa Clara County48
  10. Contra Costa County40
  11. Sonoma County33
  12. Kern County29

Related classes in Specialty

C-61 Limited Specialty (D classifications)D-03 AwningsD-09 Drilling, Blasting and Oil Field WorkD-12 Synthetic ProductsD-21 Machinery and PumpsD-28 Doors, Gates and Activating DevicesD-39 ScaffoldingD-40 Service Station Equipment and MaintenanceD-42 Non-Electrical Sign InstallationD-52 Window CoveringsD-63 Construction Clean-upD-64 Non-specialized

Frequently asked

What does a D-34 licence allow a contractor to do?
Installs prefabricated equipment.
What insurance does a D-34 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.
How many D-34 contractors are there in California?
1,363 active licences hold the D-34 classification as of 2026-09-06; 928 (68%) have workers' comp on file and 368 are exempt.
When do D-34 workers' comp policies renew?
224 renew within 90 days. January is the peak month.
Selling to D-34 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 worksSearch 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 →