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State files updated Oct 30, 2026
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California contractor license

Isaac's Tree Service

Isaac's Tree Service of Colton holds California license 1075637 (D49 Tree Service). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires May 31, 2028.

Active

Isaac's Tree Service, Colton

  • Bond has a cancellation date on file: Nov 4, 2026.
License
1075637
Class
D49 Tree Service
Expires
May 31, 2028
Bond
$25,000
Workers' comp
Insured to Jul 15, 2027

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
$25,000Philadelphia Indemnity Insurance Company, from Oct 1, 2025, continuous, cancel date Nov 4, 2026
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from Jul 15, 2026, to Jul 15, 2027

Who is on this license?

Officer
Deniss K. Negrete LopezSince May 24, 2022
Responsible managing officer, CEO and president
Sergio E. AldanaSince May 11, 2021

What work does this license cover?

Issued May 11, 2021. Reissued May 24, 2022.

A cancellation date is on file for a bond or policy. Ask for a current certificate before work starts.

Which other Colton businesses hold D49 Tree Service?

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)