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State files updated Oct 28, 2026
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California contractor license

Buffalo Mechanical

Buffalo Mechanical of Sacramento holds California license 1137903 (B General Building, C2 Insulation and Acoustical, C4 Boiler, Hot Water Heating and Steam Fitting, C20 Warm-Air Heating, Ventilating and Air-Conditioning, C34 Pipeline, C36 Plumbing, C42 Sanitation System). The CSLB file dated Oct 28, 2026 lists it as active.1 It expires May 31, 2027.

Doing business as TJR Buffalo Inc.

Active

Buffalo Mechanical, Sacramento

License
1137903
Class
B General Building; C2 Insulation and Acoustical; C4 Boiler, Hot Water Heating and Steam Fitting; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C34 Pipeline; C36 Plumbing; C42 Sanitation System
Expires
May 31, 2027
Bond
$25,000
Workers' comp
Insured to Jan 1, 2027

CSLB file dated Oct 28, 2026

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

Issued May 22, 2025.

Bond
$25,000Fidelity And Deposit Company Of Maryland, from May 14, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredArch Insurance Company, from Jan 1, 2026, to Jan 1, 2027

What work does this license cover?

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 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 28, 2026)
  2. Contractors State License Board (CSLB)