Warm Zone INC, C-4 Boiler, Hot Water Heating and Steam Fitting Contractor in Sebastopol, CA
Warm Zone INC operating as a corporation holds California contractor license #412438, which is currently expired (lapsed Jun 30, 2026) and not valid to contract until it is renewed. First issued in 1981, the license has been on the CSLB roster for 45 years. It carries 2 CSLB classifications: C-4 Boiler, Hot Water Heating and Steam Fitting Contractor and C-36 Plumbing Contractor. Records show a previously-filed surety bond from Western Surety Company that is no longer active and active workers' compensation coverage from Security National Insurance Company. The business is based in Sebastopol, in Sonoma County, California.
- License Number
- 412438
- Issued
- Aug 18, 1981
- Status
- CLEAR
- Expires
- Jun 30, 2026
- Entity
- Corporation
- Surety
- Western Surety Company
- Bond Number
- 69353357
- Effective
- Jan 1, 2023
- Status
- Cancelled
- Cancelled
- Jun 25, 2026
- Coverage
- Workers' Compensation Insurance
- Carrier
- Security National Insurance Company
- Policy Number
- TES4678574
- Effective
- Oct 1, 2025
- Expires
- Oct 1, 2026
This contractor has a compliance issue in its public CSLB record:
- License expired
- Contractor bond cancelled
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Warm Zone INC licensed in California?
Warm Zone INC previously held California Contractors State License Board license number 412438, but the license expired on June 30, 2026 and is not currently valid. It was first issued on August 18, 1981.
What does Warm Zone INC specialize in?
Warm Zone INC is licensed for 2 CSLB classifications: C-4 Boiler, Hot Water Heating and Steam Fitting Contractor and C-36 Plumbing Contractor.
Where is Warm Zone INC headquartered?
Warm Zone INC is headquartered at 3430 Hicks Road, Sebastopol, CA 95472, in Sonoma County, California.
Does Warm Zone INC have an active surety bond on file with CSLB?
Warm Zone INC has a previously-filed surety bond from Western Surety Company that is no longer active.
Does Warm Zone INC carry workers' compensation coverage?
Yes. Warm Zone INC carries active workers' compensation coverage through Security National Insurance Company.
How do I verify Warm Zone INC's contractor license?
You can verify Warm Zone INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=412438.
- License issuedAug 18, 1981
- Bond activeJan 1, 2023
- WC coverage startsOct 1, 2025
- Bond cancelledJun 25, 2026
- License expiredJun 30, 2026
- WC expiresOct 1, 2026
- Carroll Mechanical Systems#396959Penngrove·C-4 Boiler, Hot Water Heating and Steam Fitting Contractor
- American Builders#427930Sonoma·A General Engineering Contractor
- Incom Mechanical INC#517617Petaluma·B General Building Contractor
- Plumbers Plus INC#497849Rohnert Park·C-4 Boiler, Hot Water Heating and Steam Fitting Contractor
- C B S Plumbing & Heating INC#294171Santa Rosa·C-4 Boiler, Hot Water Heating and Steam Fitting Contractor
- Etchell Bob Plumbing & Heating#267201Healdsburg·C-4 Boiler, Hot Water Heating and Steam Fitting Contractor
- Masterson Bryan Enterprises#271933Petaluma·A General Engineering Contractor
- Eddinger Enterprises INC#301487Healdsburg·B General Building Contractor
Working a California job with Warm Zone INC, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Warm Zone INC? Claim or correct this profile