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State files updated Oct 31, 2026
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California contractor license

Blach Construction Company

Blach Construction Company of San Jose holds California license 290418 (A General Engineering, B General Building). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires Jun 30, 2027.

Licensed 52 years, longer than 98% of 1,431 active San Jose general contractors.

Active

Blach Construction Company, San Jose

License
290418
Class
A General Engineering; B General Building
Expires
Jun 30, 2027
Bond
$25,000
Workers' comp
Insured to Apr 1, 2027

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
$25,000Liberty Mutual Insurance Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredZurich American Insurance Company, from Apr 1, 2026, to Apr 1, 2027

Who is on this license?

Officer
Margaret B. BlachSince Oct 16, 1997
Officer
Catherine B. EllingtonSince May 15, 2018
Responsible managing officer
Michael J. BlachSince Aug 15, 1989
CEO and president
Daniel L. RogersSince Feb 28, 2005

What work does this license cover?

Issued Jan 24, 1974.

Which other San Jose businesses hold A General Engineering?

General Contractors in San JoseCalifornia 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)