ERNEST ONGARO & SONS INC DBA ONGARO & SONS
California contractor license #215233 · Petaluma, Sonoma County
License
- License number
- 215233
- Status
- Clear
- Classifications
- C-4 Boiler, Hot-Water Heating and Steam Fitting Contractor
- C-10 Electrical Contractor
- C-16 Fire Protection Contractor
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor
- C-34 Pipeline Contractor
- C-36 Plumbing Contractor
- C-39 Roofing Contractor
- C-42 Sanitation System Contractor
- C-43 Sheet Metal Contractor
- C-60 Welding Contractor
- C-61/D-21 Machinery and Pumps
- Business type
- Corporation
- Issued
- Feb 13, 1963
- Expires
- Jan 31, 2028
- Workers' compensation
- Workers' Compensation Insurance — Amtrust Insurance Company
- Contractor's bond
- $25,000 — Merchants Bonding Company (Mutual)
- DIR public works registration
- Registered through Jun 30, 2028
From the California Contractors State License Board (CSLB) public license file, last updated Oct 1, 2026. Verify license #215233 on CSLB's License Check.
California public works
ERNEST ONGARO & SONS INC DBA ONGARO & SONS appears on 1 public works project registered with the California Department of Industrial Relations, 1 of them as the prime contractor, for 1 awarding body between 2025 and 2025. Projects it led total $22,960 in reported contract value.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Dec 31, 2025 | Sonoma MountainPlumbing & restrooms | Old Adobe Union School District | Prime | $22,960 |
Most recent 1 of 1. Contract amounts are the whole project's, as the awarding body reported them to DIR (reported since July 2024); a role is "Prime" when the awarding body registered the contractor on the project.
Awarding bodies it works for most
- Old Adobe Union School District · 1 project
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