Birdray

Plumbing contractors in Alameda County

Workers' comp renewals, lapses, and carriers for plumbing contractors licensed in Alameda County, California. Aggregate figures from CSLB and state records, as of 2026-09-02.

533
Active licenses
258
With workers' comp
48% of active
61
Renewing in 90 days
52 within 60
8
Lapsed or suspended
260 exempt

Workers' comp renewals by month, Alameda County

Policies on file with the CSLB expiring in each of the next 12 months.

15
Sep
31
Oct
14
Nov
17
Dec
27
Jan
23
Feb
17
Mar
27
Apr
16
May
19
Jun
21
Jul
14
Aug

Top carriers

  1. State Compensation Insurance Fund42
  2. Employers Preferred Insurance Company18
  3. Technology Insurance Company Inc18
  4. Amtrust Insurance Company17
  5. Hartford Casualty Insurance Company12
  6. Security National Insurance Company12
  7. American Casualty Company Of Reading Pa10
  8. Everest Premier Insurance Company8

Top cities

  1. Oakland136
  2. Hayward80
  3. Livermore62
  4. San Leandro54
  5. Fremont32
  6. Berkeley27
  7. Alameda26
  8. Castro Valley24
  9. Pleasanton24
  10. San Lorenzo16

Trades

  1. Plumbing533
  2. General Building152
  3. Electrical62
  4. Specialty54
  5. HVAC52
  6. General Engineering46
  7. Fire Protection32
  8. Painting/Finish16

Size and risk

large35
mid111
small387
high risk7
medium risk6
low risk520

Sources: CSLB license and workers' compensation records, CA Secretary of State, OSHA, FMCSA. Aggregates only; no individual contractor data appears on this page. Size and risk tiers are Birdray estimates.

Frequently asked

How many plumbing contractors are licensed in Alameda County?
533 hold an active CSLB license classed as Plumbing in Alameda County as of 2026-09-02.
How many carry workers' compensation insurance?
258 have a workers' comp policy on file with the CSLB; 260 filed an exemption and 8 are lapsed or suspended.
When do their policies renew?
52 renew within 60 days and 61 within 90 days. The month-by-month curve on this page shows the next 12 months.
Which carriers write the most plumbing contractors here?
STATE COMPENSATION INSURANCE FUND (42), EMPLOYERS PREFERRED INSURANCE COMPANY (18), TECHNOLOGY INSURANCE COMPANY INC (18)
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Birdray shows the specific plumbing contractors in Alameda County renewing this quarter, with owner contact, carrier, and x-date.
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