California contractor license
ERNEST ONGARO & SONS INC
- C10 Electrical
- C16 Fire Protection
- C20 Warm-Air Heating, Ventilating And Air-Conditioning
- C34 Pipeline
- C36 Plumbing
- C39 Roofing
- C-4 Boiler, Hot Water Heating And Steam Fitting
- C42 Sanitation System
- C43 Sheet Metal
- C60 Welding
- C-61 / D21 Machinery And Pumps
ERNEST ONGARO & SONS INC is a contractor with 11 license classifications, including C10 Electrical and C16 Fire Protection, in Petaluma, Sonoma County, licensed in California for 63 years (since 1963). As of Dec 31, 2025, the license is active with an expiration date of Jan 31, 2028 on record and a license bond is on file.
ERNEST ONGARO & SONS INCC10 Electrical · C16 Fire Protection · C20 Warm-Air Heating, Ventilating And Air-Conditioning · C34 Pipeline · C36 Plumbing · C39 Roofing · C-4 Boiler, Hot Water Heating And Steam Fitting · C42 Sanitation System · C43 Sheet Metal · C60 Welding · C-61 / D21 Machinery And Pumps · checked Dec 31, 2025
ActiveLicense number#215233
Licensed sinceFeb 13, 1963
Years licensed63 years
Expiration on recordJan 31, 2028
City and countyPetaluma, Sonoma County
License bondOn file
ProjectsNone on file
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Source: California Contractors State License Board (CSLB) and City of Los Angeles permit records. Last updated Dec 31, 2025.