Birdray

CSLB classification · Specialty

D-21 Machinery and Pumps

Installs machinery and pumps.

1,040
Active licences
727
With workers' comp
70%
171
Renewing in 90 days
29
Lapsed or suspended
254
Exempt
10
New in 90 days

Coverages a producer should expect

  • ›Workers' comp
  • ›General liability
  • ›Equipment

WCIRB classes usually assigned

  • 3724 Machinery installation

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 Fund119
  2. Insurance Co. Of The West72
  3. Travelers Property Casualty Co. Of America45
  4. Pie Insurance Co.28
  5. Amtrust Insurance Co.24
  6. Technology Insurance Co. Inc22
  7. Everest Premier Insurance Co.20
  8. Zurich American Insurance Co.18
  9. Omaha National Casualty Co.17
  10. Hartford Casualty Insurance Co.16

D-21 workers' comp renewals by month, California

44
Sep
78
Oct
33
Nov
51
Dec
107
Jan
41
Feb
55
Mar
71
Apr
52
May
63
Jun
54
Jul
41
Aug
2
Sep

Counties with the most

  1. County172
  2. Los Angeles County92
  3. San Bernardino County65
  4. Orange County63
  5. Riverside County55
  6. Kern County47
  7. Fresno County43
  8. San Diego County36
  9. Sacramento County31
  10. Alameda County31
  11. San Joaquin County29
  12. Sonoma County28

Related classes in Specialty

C-61 Limited Specialty (D classifications)D-03 AwningsD-09 Drilling, Blasting and Oil Field WorkD-12 Synthetic ProductsD-28 Doors, Gates and Activating DevicesD-34 Prefabricated EquipmentD-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-21 licence allow a contractor to do?
Installs machinery and pumps.
What insurance does a D-21 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; Equipment.
How many D-21 contractors are there in California?
1,040 active licences hold the D-21 classification as of 2026-09-06; 727 (70%) have workers' comp on file and 254 are exempt.
When do D-21 workers' comp policies renew?
171 renew within 90 days. January is the peak month.
Which WCIRB class codes apply to D-21 work?
Most often 3724 (Machinery installation). The WCIRB assigns the class from the actual operations and payroll, so verify per account in the WCIRB classification search.
Selling to D-21 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 →