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Ys Mechanical Inc

Ys Mechanical Inc of Los Angeles holds California license 1123894 (B General Building, C20 Warm-Air Heating, Ventilating and Air-Conditioning). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Jul 31, 2028.

Active

Ys Mechanical Inc, Los Angeles

License
1123894
Class
B General Building; C20 Warm-Air Heating, Ventilating and Air-Conditioning
Expires
Jul 31, 2028
Bond
$25,000
Workers' comp
Insured to Jul 12, 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
$25,000American Contractors Indemnity Company, from Jul 15, 2024, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredAmguard Insurance Company, from Jul 12, 2026, to Jul 12, 2027

Who is on this license?

Responsible managing officer
Yang G. KimSince Jul 19, 2024
CEO and president
Sang Woo KimSince Jul 19, 2024

What work does this license cover?

Issued Jul 19, 2024.

Which other Los Angeles businesses hold B General Building?

HVAC Contractors in Los AngelesCalifornia HVAC contractorsGeneral Contractors in Los AngelesCalifornia general 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, Oct 29, 2026)
  2. Contractors State License Board (CSLB)