Skip to content
State files updated Oct 30, 2026
Look up a contractor
MenuClose

Home / License lookup / California / Alliant Construction Services Inc

California contractor license

Alliant Construction Services Inc

Alliant Construction Services Inc of Diamond Bar holds California license 1061441 (B General Building). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Dec 31, 2027.

Licensed 6 years, longer than 50% of 101 active Diamond Bar general contractors.

Active

Alliant Construction Services Inc, Diamond Bar

  • Workers' comp on file ended Oct 28, 2026.
License
1061441
Class
B General Building
Expires
Dec 31, 2027
Bond
$25,000
Workers' comp
Insured to Oct 28, 2026

CSLB file dated Oct 30, 2026

From the CSLB file dated Oct 30, 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 30, 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
InsuredInsurance Company Of The West, from Oct 28, 2025, to Oct 28, 2026

Who is on this license?

Officer
Daniel E. ZayasSince Dec 16, 2019
Responsible managing officer, CEO and president
Kenneth J. LeonSince Dec 16, 2019

What work does this license cover?

Issued Dec 16, 2019.

Which other Diamond Bar businesses hold B General Building?

General Contractors in Diamond BarCalifornia 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 30, 2026)
  2. Contractors State License Board (CSLB)