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California contractor license

Monkey Wrench Plumbing Heating Air & Electric

Monkey Wrench Plumbing Heating Air & Electric of Monterey Park holds California license 922757 (B General Building, C10 Electrical, C20 Warm-Air Heating, Ventilating and Air-Conditioning, C36 Plumbing). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Feb 28, 2027.

Doing business as Green World Maintenance Inc.

Licensed 18 years, longer than 71% of 21 active Monterey Park electrical contractors.

Active

  • Workers' comp ends Nov 8, 2026 (7 days)

Monkey Wrench Plumbing Heating Air & Electric, Monterey Park

License
922757
Class
B General Building; C10 Electrical; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
Expires
Feb 28, 2027
Bond
$25,000
Workers' comp
Insured to Nov 8, 2026

CSLB file dated Nov 1, 2026

From the CSLB file dated Nov 1, 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 Nov 1, 2026. Confirm with the board: CSLB license check

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

Bond
$25,000Philadelphia Indemnity Insurance Company, from Jan 21, 2026, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredTechnology Insurance Company Inc, from Nov 8, 2025, to Nov 8, 2026

Who is on this license?

Responsible managing officer, CEO and president
Yossef Y. WachtelSince Sep 24, 2008
Responsible managing officer, CEO and president
Mark E. OlsonSince Jul 31, 2023
Responsible managing officer
Steven E. HermanSince Feb 22, 2024

What work does this license cover?

Issued Sep 24, 2008. Reissued Feb 9, 2009.

Which other Monterey Park businesses hold B General Building?

California electrical contractorsCalifornia plumbing contractors

What should you check before hiring?

What to ask before you hire

  1. Ask whether it has been renewed. Something on this license ends within 60 days. Check again before you pay a deposit.
  2. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  3. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  4. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  5. 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.
  6. 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, Nov 1, 2026)
  2. Contractors State License Board (CSLB)