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4d Milling INC

License #1138350·Corporation·Oak Glen, San Bernardino County
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Summary

4d Milling INC operating as a corporation is licensed in California under CSLB number 1138350. The license was first issued in 2025, putting the business at 1 year on the active CSLB roster. It carries a single CSLB classification: A — General Engineering Contractor. Records show an active surety bond on file with Western Surety Company and active workers' compensation coverage from National Casualty Company. The business is based in Oak Glen, in San Bernardino County, California.

Business Information
Address
39800 Pine Bench Road
Oak Glen, CA 92399
License Details & Classifications
License Number
1138350
Issued
Jun 3, 2025
Status
CLEAR
Expires
Jun 30, 2027
Entity
Corporation
Financial & Insurance Coverage
Contractor Bond
Surety
Western Surety Company
Bond Number
67492315
Effective
May 15, 2025
Status
Active
Workers' Compensation
Coverage
Workers' Compensation Insurance
Carrier
National Casualty Company
Policy Number
WWC340146A
Effective
Feb 21, 2026
Expires
Feb 21, 2027
Review

This contractor warrants a closer look before contracting:

  • License issued less than 2 years ago
License StatusActive
Contractor BondOn file
Workers' CompensationActive

An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this

Frequently asked questions
Is 4d Milling INC licensed in California?

Yes. 4d Milling INC holds California Contractors State License Board license number 1138350. The license was first issued on June 3, 2025. It is valid through June 30, 2027.

What does 4d Milling INC specialize in?

4d Milling INC is licensed for one CSLB classification: A General Engineering Contractor.

Where is 4d Milling INC headquartered?

4d Milling INC is headquartered at 39800 Pine Bench Road, Oak Glen, CA 92399, in San Bernardino County, California.

Does 4d Milling INC have an active surety bond on file with CSLB?

Yes. 4d Milling INC has an active California contractor surety bond filed with Western Surety Company.

Does 4d Milling INC carry workers' compensation coverage?

Yes. 4d Milling INC carries active workers' compensation coverage through National Casualty Company.

How do I verify 4d Milling INC's contractor license?

You can verify 4d Milling INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1138350.

Activity Timeline
  1. Bond activeMay 15, 2025
  2. License issuedJun 3, 2025
  3. WC coverage startsFeb 21, 2026
  4. WC expiresFeb 21, 2027
  5. License expiresJun 30, 2027
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