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State files updated Oct 27, 2026
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Minnesota contractor license

Ditter Inc

Ditter Inc of Hamel holds Minnesota license MB003161 (Mechanical Contractor Bond). The DLI file dated Oct 27, 2026 lists it as active.1 It expires Aug 21, 2028.

Licensed 17 years, longer than 87% of 2,445 active Minnesota HVAC contractors.

Active

Ditter Inc, Hamel

License
MB003161
Class
Mechanical Contractor Bond
Expires
Aug 21, 2028
Bond
On file to Aug 21, 2028

DLI file dated Oct 27, 2026

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

Bond
On fileto Aug 21, 2028
Liability insurance
Not in the DLI fileCheck with the board
Workers' comp
Not in the DLI fileCheck with the board

What work does this license cover?

License level: Mechanical Contractor Bond. Issued Jul 22, 2009.

Which other Hamel businesses hold Mechanical Contractor Bond?

Minnesota 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. Minnesota 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. The DLI file doesn't record workers' comp, so ask for the certificate.
  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 DLI 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 DLI, then check again.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Department of Labor and Industry (DLI).
  4. Check another contractor. Minnesota license lookup

Sources

  1. DLI license and registration export (dli.mn.gov, Oct 27, 2026)
  2. Department of Labor and Industry (DLI)