California contractor license
GRISWOLD MECHANICAL CORPORATION
- B General Building
- C10 Electrical
- C20 Warm-Air Heating, Ventilating And Air-Conditioning
- C36 Plumbing
GRISWOLD MECHANICAL CORPORATION is a contractor with 4 license classifications, including B General Building and C10 Electrical, in Walnut Creek, Contra Costa County, licensed in California for 50 years (since 1976). As of Sep 18, 2025, the license is active with an expiration date of Dec 31, 2026 on record and a license bond is on file.
GRISWOLD MECHANICAL CORPORATIONB General Building · C10 Electrical · C20 Warm-Air Heating, Ventilating And Air-Conditioning · C36 Plumbing · checked Sep 18, 2025
ActiveLicense number#319036
Licensed sinceMay 5, 1976
Years licensed50 years
Expiration on recordDec 31, 2026
City and countyWalnut Creek, Contra Costa 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 Sep 18, 2025.