Independent site · Not affiliated with CSLB or any state agency
Contractor LookoutCalifornia

Licensed General Engineering Contractors in Sonoma, California

Updated November 1, 2026 from CSLB's public license file · A General Engineering Contractor

  • 22licensed general engineering contractors
  • 21active (Clear)
  • 4.5%with a suspension
  • 36.4%workers' comp exempt
  • 31.7 yrsmedian time licensed
  • 77.3%corp / LLC / partnership (22.7% sole owner)
  • 1new in the last 12 months
  • —change tracking began November 1, 2026

CSLB's public data lists 22 general engineering contractors with a mailing address in Sonoma, and 21 of them (95.5%) show a Clear primary status.

36.4% report a workers' comp exemption, 1 points higher than the statewide figure for general engineering contractors (35.4%), so many of these businesses say they have no employees. The share with a suspension, 4.5%, is 1.3 points lower than the Sonoma County rate for the same license (5.8%).

1 of these licenses is less than a year old, while 86.4% have been held for 10 years or more. The median is 31.7 years.

These firms hold CSLB's A (General Engineering Contractor) license for engineered fixed works. See the A General Engineering Contractor guide for what the license covers.

How to check a general engineering contractor's license in Sonoma

  1. Find the business in the list below, or search all 22 Sonoma listings, and open its profile. You want a Clear status and the A classification (a B license can also cover it as part of a multi-trade job).
  2. Re-check the same number on CSLB's Instant License Check the day you sign; our copy is refreshed weekly and 4.5% of Sonoma listings here already show a suspension.
  3. Match the license holder's name to the name on the written contract and the person you meet. Ask for proof of workers' comp if anyone besides the owner will work on site. Hiring checklist.

All 22 general engineering contractors in Sonoma

Sonoma general engineering contractors sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed general engineering contractors in Sonoma
Business nameLicense #StatusYearsWorkers' compBond
E K Excavating INC 275372 Clear 54 Insured On file
Dunham's Back-Hoe Service 379304 Clear 47 Exempt On file
Versaggi Construction 389865 Clear 46 Exempt On file
American Builders 427930 Clear 44 Exempt On file
Abide International INC 462833 Clear 42 Insured On file
Serres Corporation 471196 Clear 41 Insured On file
Ryan Engineering Incorporated 476513 Clear 41 Insured On file
Murray Building INC 646709 Clear 34 Insured On file
Mak Engineering INC 651533 Clear 34 Insured On file
Griffiths Construction 692856 Clear 32 Exempt On file
Thomas Anderson & CO 715281 Clear 31 Exempt On file
Broderick General Engineering INC 750809 Clear 28 Insured On file
Grossi James Construction 789874 Clear 25 Exempt On file
Manzoni Trucking & Excavating INC 862651 Clear 21 Insured On file
J R Excavating & Sons INC 949209 Clear 16 Insured On file
Gopher - It Trenchless 982140 Clear 13 Insured On file
Lunny Engineering INC 982088 Clear 13 Insured On file
Wellander Corporation 985622 Clear 13 Insured On file
McMahon Fernandez Construction INC 1055940 Clear 7 Insured On file
Easton Plumbing INC 1059513 Clear 7 Insured On file
J&J Plask Excavating LLC 1156936 Clear <1 Exempt On file
Pioneer Builders 555580 Susp: contractor's bond 37 Exempt On file

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed general engineering contractors are in Sonoma?

CSLB's current public file lists 22 general engineering contractors with a Sonoma mailing address. 21 have a Clear status, and 95.5% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a general engineering contractor need in California?

Look for A on the license. 22 businesses in Sonoma hold it. Small jobs under $1,000 with no permit and no employees are exempt; everything else needs a license (details).

How do I check a general engineering contractor's workers' comp?

Each profile shows the workers' comp type, insurer and policy dates from CSLB's file. Among Sonoma general engineering contractors, 36.4% are exempt (no employees), 63.6% insured and 0% without current coverage. Verify a policy with CSLB's insurer search (step by step).

Related

General Engineering Contractors in nearby cities

Other licensed trades in Sonoma

Guides