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California contractor license

T M Mechanical Company Inc

T M Mechanical Company Inc of San Francisco holds California license 961018 (C4 Boiler, Hot Water Heating and Steam Fitting, C20 Warm-Air Heating, Ventilating and Air-Conditioning, C36 Plumbing). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires May 31, 2027.

Licensed 15 years, longer than 58% of 249 active San Francisco plumbing contractors.

Active

T M Mechanical Company Inc, San Francisco

License
961018
Class
C4 Boiler, Hot Water Heating and Steam Fitting; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
Expires
May 31, 2027
Bond
$25,000
Workers' comp
Insured to May 11, 2027

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
$25,000Business Alliance Insurance Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from May 11, 2024, to May 11, 2027

Who is on this license?

Responsible managing officer, CEO and president
Mark S. GreenwaldSince May 13, 2011
Responsible managing officer
Gerald M. BenderSince Oct 8, 2013

What work does this license cover?

Issued May 13, 2011. Reissued May 30, 2013.

Which other San Francisco businesses hold C4 Boiler, Hot Water Heating and Steam Fitting?

Plumbing Contractors in San FranciscoCalifornia plumbing contractorsCalifornia HVAC 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, Nov 1, 2026)
  2. Contractors State License Board (CSLB)