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California contractor license

M3 Mep LLC

M3 Mep LLC of Sacramento holds California license 1098716 (A General Engineering, B General Building, C4 Boiler, Hot Water Heating and Steam Fitting, C7 Low Voltage Systems, C10 Electrical, C16 Fire Protection, C20 Warm-Air Heating, Ventilating and Air-Conditioning, C36 Plumbing). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Nov 30, 2026.

Active

  • License ends Nov 30, 2026 (32 days)

M3 Mep LLC, Sacramento

License
1098716
Class
A General Engineering; B General Building; C4 Boiler, Hot Water Heating and Steam Fitting; C7 Low Voltage Systems; C10 Electrical; C16 Fire Protection; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
Expires
Nov 30, 2026
Bond
$25,000
Workers' comp
Insured to Apr 1, 2027

CSLB file dated Oct 29, 2026

From the CSLB file dated Oct 29, 2026. Not a consumer report; check the board before you hire.

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

Bond
$25,000Harco National Insurance Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredTwin City Fire Insurance Company, from Apr 1, 2026, to Apr 1, 2027

Who is on this license?

Responsible managing officer
Mark T. O'BrienSince Nov 14, 2022
Responsible managing manager
Daniel E. CarltonSince Nov 14, 2022

What work does this license cover?

Issued Nov 14, 2022.

Which other Sacramento businesses hold A General Engineering?

Electrical Contractors in SacramentoCalifornia electrical contractorsPlumbing Contractors in SacramentoCalifornia 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, Oct 29, 2026)
  2. Contractors State License Board (CSLB)