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California contractor license

Kolpack Glenn H Inc

Kolpack Glenn H Inc of Sonora holds California license 287112 (A General Engineering, B General Building). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires Jan 31, 2027.

Licensed 53 years, longer than 98% of 59 active Sonora general contractors.

Active

Kolpack Glenn H Inc, Sonora

License
287112
Class
A General Engineering; B General Building
Expires
Jan 31, 2027
Bond
$25,000
Workers' comp
Exempt

CSLB file dated Oct 31, 2026

From the CSLB file dated Oct 31, 2026. Not a consumer report; check the board before you hire.

Has the board taken action on this license?

None in the CSLB file dated Oct 31, 2026. Confirm with the board: CSLB license check

What bond, insurance and workers' comp are on file?

Bond
$25,000American Contractors Indemnity Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
Exemptfrom Dec 23, 2024

Who is on this license?

Officer
Hank C. KolpackSince Jan 31, 2019
Responsible managing officer, CEO and president
Glenn H. KolpackSince Mar 1, 1978
Responsible managing officer
Bonnie J. KolpackSince Oct 28, 1999

What work does this license cover?

Issued Sep 20, 1973. Reissued Jan 31, 2019.

The workers' comp exemption means the holder told the CSLB it has no employees. If a crew works on your job, ask for a workers' comp certificate.

Which other Sonora businesses hold A General Engineering?

California general contractors

What should you check before hiring?

What to ask before you hire

  1. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  2. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  3. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  4. Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
  5. Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

  1. Don't sign or pay a deposit until the CSLB shows the license active again.
  2. Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
  4. Check another contractor. California license lookup

Sources

  1. CSLB License Master (cslb.ca.gov, Oct 31, 2026)
  2. Contractors State License Board (CSLB)