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Contractor LookoutCalifornia

Licensed General Contractors in Sonoma, California

Updated November 1, 2026 from CSLB's public license file · B General Building Contractor

  • 164licensed general contractors
  • 158active (Clear)
  • 3.7%with a suspension
  • 59.1%workers' comp exempt
  • 18.6 yrsmedian time licensed
  • 44.5%corp / LLC / partnership (55.5% sole owner)
  • 5new in the last 12 months
  • —change tracking began November 1, 2026

Sonoma is home to 164 general contractors in CSLB's license file, ranking #4 of 14 Sonoma County cities for this trade. 96.3% are Clear.

The share with a suspension (3.7%) is close to the Sonoma County rate for the same license (4.3%). 59.1% report a workers' comp exemption, 1.4 points higher than the statewide figure for general contractors (57.7%), so many of these businesses say they have no employees.

The median general contractor here has held a license for 18.6 years (more than the statewide median of 15.3), and 5 licenses were issued in the last 12 months.

General contractors hold CSLB's B (General Building Contractor) license, which covers projects that combine two or more unrelated trades. See the B General Building Contractor guide for what the license covers.

How to check a general contractor's license in Sonoma

  1. Look the company up by name or license number (search Sonoma). On the profile, confirm three things: Clear status, the B license for this kind of work, and a contractor's bond on file.
  2. Before any money changes hands, verify the license on CSLB's own lookup. Our data comes from CSLB's weekly file, so a very recent change may not show here yet.
  3. Match the license holder's name to the name on the written contract and the person you meet. Since 59.1% of Sonoma general contractors claim a workers' comp exemption, ask who will actually do the work. Hiring checklist.

50 of 164 general contractors in Sonoma

Sonoma general 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 contractors in Sonoma
Business nameLicense #StatusYearsWorkers' compBond
Napa Sonoma Builders 117102 Clear 76 Exempt On file
Peterson Mechanical INC 171486 Clear 69 Insured On file
Botieff William Contractor 193984 Clear 66 Exempt On file
O'gorman Robert General Contractor 321530 Clear 50 Exempt On file
Lely R J Construction 325380 Clear 50 Insured On file
Burlington Steve C 375816 Clear 47 Exempt On file
Versaggi Construction 389865 Clear 46 Exempt On file
Ray Jon & Sons Construction 397968 Clear 45 Insured On file
Ledson Construction 404946 Clear 45 Exempt On file
Rupiper Gerald Stanley 416906 Clear 44 Exempt On file
Sammon Ed Construction 418048 Clear 44 Exempt On file
American Builders 427930 Clear 44 Exempt On file
Castelli Construction 428801 Clear 44 Exempt On file
Abide International INC 462833 Clear 42 Insured On file
Brady Construction Company 479385 Clear 41 Exempt On file
Szanyi Construction INC 508018 Clear 39 Exempt On file
Portello Construction 518418 Clear 39 Exempt On file
Sweeney Phelim J Construction 520619 Clear 39 Exempt On file
Portal Construction 552858 Clear 37 Insured On file
Szumski Daniel Stephen 566657 Clear 37 Exempt On file
Hoh Builders 587755 Clear 36 Insured On file
Byrnes & McClellan Construction INC 615048 Clear 35 Insured On file
North Counties Drywall INC 630523 Clear 35 Insured On file
Jones L M Electric INC 638441 Clear 34 Exempt On file
Murray Building INC 646709 Clear 34 Insured On file
Hartmann Construction 660192 Clear 33 Exempt On file
R A Wilson Construction Corp 665636 Clear 33 Insured On file
Rockridge Construction 671287 Clear 33 Exempt On file
Heritage Construction 678343 Clear 33 Exempt On file
Grgich Stanley Nicholas 686550 Clear 32 Exempt On file
Con Mara Gardens INC 694439 Clear 32 Insured On file
Miltenberger Construction CO 693407 Clear 32 Insured On file
Thomas Anderson & CO 715281 Clear 31 Exempt On file
Duffy Construction 717952 Clear 30 Exempt On file
Lanning Steve Construction INC 718390 Clear 30 Insured On file
Welch Darrel D 724090 Clear 30 Insured On file
Rocket Science 732497 Clear 29 Exempt On file
Perot Construction 734142 Clear 29 Exempt On file
Kegler L B General Contractor 735241 Clear 29 Exempt On file
Van's Construction 742306 Clear 29 Exempt On file
Rg Construction 746491 Clear 28 Exempt On file
Young Bert 749654 Clear 28 Exempt On file
Greystone West Company 753972 Clear 28 Insured On file
Landers Curry INC 754084 Clear 28 Insured On file
Hughes John E 755594 Clear 28 Exempt On file
Horizon Builders INC 758694 Clear 27 Insured On file
McElligott Construction INC 759480 Clear 27 Exempt On file
Wine Country Builders INC 763980 Clear 27 Insured On file
Rocha Construction 769599 Clear 27 Exempt On file
Adept Remodel and Construction 771528 Clear 27 Insured On file

See all 164 general contractors in Sonoma

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 contractors are in Sonoma?

CSLB's current public file lists 164 general contractors with a Sonoma mailing address. 158 have a Clear status, and 86.6% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a general contractor need in California?

General contractors hold CSLB's B (General Building Contractor) license, which covers projects that combine two or more unrelated trades. Any job of $1,000 or more in labor and materials needs a licensed contractor. Read our guide to the $1,000 rule.

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

Open the contractor's profile here to see the workers' comp type and insurer from CSLB's file. In Sonoma, 40.9% of general contractors list a policy, 59.1% claim an exemption and 0% show no current coverage. Confirm the policy with CSLB's workers' comp search before work starts. How to check workers' comp.

Related

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Guides