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General contractors in Sonoma County, CA

1,983 eligible B and B-2 licenses based in Sonoma County, per CSLB records dated Oct 16, 2026.

Checked Oct 18, 2026 Verify live on CSLB

25 of 1,983 Sonoma County GCs

Sorted by workers' comp policy on file, then years licensed (we don't have permit data for Sonoma County). How we rank. Payment doesn't change the order.

Bid requests come to GC Bay Area first, not straight to the contractor.

3

Western Built

Based in Santa Rosa

workers’ comp insured · licensed 61 yrs

Active · B · #232904 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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4

Morton Construction

Legal name: The Morton Group Inc · Based in Healdsburg

workers’ comp insured · licensed 58 yrs

Active · B · #251553 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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6

Galeazzi Kyle D

Legal name: North Bay Monument Co · Based in Rohnert Park

workers’ comp insured · licensed 55 yrs

Active · B · #268152 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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8

A C Menne

Based in Sebastopol

workers’ comp insured · licensed 51 yrs

Active · B · #302654 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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Show 15 more
13

Reece Construction

Legal name: Reece General Building Inc · Based in Occidental

workers’ comp insured · licensed 49 yrs

Active · B · #341097 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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17

J L Builders

Based in Healdsburg

workers’ comp insured · licensed 47 yrs

Active · B · #373524 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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25

Thiessen Homes

Based in Sebastopol

workers’ comp insured · licensed 45 yrs

Active · B · #396388 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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Business build-out? See commercial GCs in the Bay Area

2,305 active B and B-2 licenses are based in Sonoma County in the CSLB file dated Oct 16, 2026, and half of them have been licensed for 19 years or more. In a Fire Hazard Severity Zone or Wildland Interface Fire Area, a permitted remodel or addition has had to meet the wildland-urban interface building rules since Jan 1, 2017 (Permit Sonoma, checked Oct 18, 2026).

Already have a contractor's name or license number?

Check it against the same CSLB data.

Searches active and lapsed Bay Area B and B-2 licenses. Other classes: search on CSLB.

Before you hire in Sonoma County

Building permits in Sonoma County go through Permit Sonoma, Building Division.

Source: Permit Sonoma, Building Division, checked Oct 18, 2026

In unincorporated Sonoma County, additions, extensive remodels and new buildings need construction plans filed through Permits Online, and every new building or addition needs a building site evaluation, valid for one year.

Source: Permit Sonoma (County of Sonoma), checked Oct 18, 2026

Permit Sonoma's goal for building plan check is 6 weeks from the date you pay fees; site reviews are usually done within a week of payment.

Source: Permit Sonoma (County of Sonoma), checked Oct 18, 2026

Since Jan 1, 2017, a permitted remodel or addition in a Fire Hazard Severity Zone or Wildland Interface Fire Area must meet the wildland-urban interface rules in the building and residential codes.

Source: Permit Sonoma, Fire Prevention, checked Oct 18, 2026

Every building permit that needs plans gets a septic review. If the project adds wastewater flow, for example new bedrooms, a Qualified Consultant has to evaluate the existing system's capacity and condition.

Source: Permit Sonoma (County of Sonoma), checked Oct 18, 2026

Homes rebuilt inside the fire burn zones go through the Resiliency Permit Center ((707) 565-1788), with faster processing and reduced permit fees. Impact fees don't apply when you rebuild at the same floor area.

Source: Permit Sonoma (County of Sonoma), checked Oct 18, 2026

B or B-2: which license fits your job

Both classes can act as your prime contractor. A B-2 is limited to remodels of an existing wood-frame house. If your plan changes the structure, look for a B.

JobB General BuildingB-2 Residential Remodeling
Kitchen or bath remodel in an existing houseYesYes, when the contract covers 3 or more unrelated trades
Addition or new roomsYesNo
Moving or removing a load-bearing wallYesNo
New homeYesNo
Commercial or tenant workYesNo

Sources: CSLB, class B and class B-2, checked Oct 18, 2026. More in B vs B-2.

California rules for your contract

A down payment on a home improvement contract can't be more than $1,000 or 10% of the price, whichever is less. No progress payment can be more than the work done or materials delivered.

Source: California B&P Code 7159.5, checked Oct 18, 2026

Work under $1,000 in total (labor and materials) that needs no building permit doesn't require a license. The exemption doesn't apply if the person advertises as a contractor, has employees, or splits a job to stay under the limit.

Source: California B&P Code 7048, checked Oct 18, 2026

Every licensed contractor must keep a $25,000 contractor's bond on file with CSLB. That has been the amount since January 1, 2023.

Source: CSLB, bond requirements, checked Oct 18, 2026

A contractor with employees must carry workers' comp. Until 2028, a B contractor with no employees can legally file an exemption, so check which one yours did. From January 1, 2028, a workers' comp certificate is required for every license.

Source: CSLB, workers' compensation, checked Oct 18, 2026

Complaint history isn't in CSLB's free data files, so we don't show it. Check complaints on CSLB before you sign.

Questions about hiring in Sonoma County

How many licensed general contractors are based in Sonoma County?

2,305 active B and B-2 licenses list Sonoma County as the business city in CSLB's records dated Oct 16, 2026. We list 1,983 of them; the other 322 have no bond on file or hold a specialty-trade license. Each card's "Verify on CSLB" link opens that license's live record.

Which license does a home remodel need?

A B (General Building) license can take a prime contract that involves two or more unrelated trades other than framing or carpentry. A B-2 (Residential Remodeling) license covers remodels of an existing wood-frame house with three or more unrelated trades, and it can't be used for additions, structural work or new homes.

How much can a contractor ask for as a down payment?

In California, a down payment on a home improvement contract is capped at $1,000 or 10% of the contract price, whichever is less.

Do I need a licensed contractor for a small job?

Work under $1,000 in total that needs no building permit is exempt from licensing. The exemption doesn't apply to someone who advertises as a contractor, has employees, or splits a job to stay under the limit.

What does "exempt" mean under workers' comp on a card?

The contractor told CSLB it has no employees. Until January 1, 2028, a B contractor with no employees can legally file that exemption. Ask whether anyone besides the owner will work on your property.

Where do I get a building permit in Sonoma County?

Permits are handled by Permit Sonoma, Building Division; the link is in "Before you hire" above. Ask your contractor who will pull the permit and have it in the contract.

General contractors near Sonoma County

Other project types in Sonoma County

How this list is built

License class, status, dates, bond and workers' comp come from the California Contractors State License Board's public data files. The Master file is dated Oct 16, 2026, the workers' comp file Oct 17, 2026, and we processed them on Oct 18, 2026. Of 2,305 active licenses in Sonoma County, 322 are left out: no bond on file, or a specialty-trade license. Each card's "Verify on CSLB" link opens that license's live record. Read the full method. Related: how to verify a license, bond and insurance, complaints.

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