Who requires it
Minnesota Department of Labor and Industry, Construction Codes and Licensing Division (CCLD)
License & permit · Minnesota
Minnesota Mechanical Contractor Bond
Minnesota does not issue a statewide mechanical contractor license, but anyone contracting for gas, heating, ventilation, cooling, air conditioning, fuel-burning, or refrigeration work must file a $25,000 surety bond with DLI. Minn. Stat. § 326B.197 establishes that requirement and authorizes the $100 biennial filing fee.
Common bond amount
$25,000
Statutory amount under Minn. Stat. § 326B.197.
How you file
File the DLI mechanical bond with a $100 fee, valid for two years
Renewal
Renew the DLI filing every two years; keep surety continuous
Who requires it
Businesses that contract to perform the mechanical work listed in § 326B.197 must keep the bond on file with DLI. Cities may still require separate local licenses or competency cards for workers—those are not this statewide bond filing.
How much is required
Minn. Stat. § 326B.197 establishes the $25,000 bond to the state for covered mechanical contracting. DLI’s approved mechanical bond form uses that amount. There is no statewide volume schedule.
How to get and file it
Work with a Minnesota-licensed surety to complete the current DLI mechanical contractor bond packet, including any disclosure and workers’ compensation forms the packet requires. Submit online or by mail with a $100 check payable to the State of Minnesota when filing by mail. The DLI bond filing is valid for two years; renew with another $100 filing fee before it lapses. Keep the surety bond itself in force while you continue to contract for covered mechanical work, and follow local licensing rules in the cities where you work.
Cost note
$25,000 is the required bond amount, not the premium you pay. See bond amount vs premium. Bond amount vs premium →
Requirement checklist
- Required amount
- $25,000 surety bond to the State of Minnesota
- Filing fee
- $100 biennial bond filing fee with DLI
- Statewide license
- No separate statewide mechanical contractor license—bond filing still required
Official sources
Related resources
Frequently asked questions
Is this the same as a plumbing contractor bond?
No. Mechanical work under § 326B.197 is a separate bond filing. Plumbing contractor licensing uses § 326B.46 and a different DLI form.
Related Minnesota bond guides
Plumbing Contractor Bond
$25,000
Plumbing contractor and restricted plumbing contractor licensing in Minnesota requires a surety bond of at least $25,000. Minn. Stat. § 326B.46, subdivision 2 establishes that bond for plumbing work; DLI’s approved plumbing contractor bond form is what you file.
Electrical Contractor Bond
$25,000
Minnesota electrical contractor licensing requires a $25,000 surety bond filed with the Department of Labor and Industry. Minn. Stat. § 326B.33, subdivision 15 establishes that amount; § 326B.0921 and the DLI electrical contractor bond form govern how the bond is written and kept in force.
Surety basics (not repeated here)
Universal surety concepts explained once—linked here instead of repeated on every state or bond page.
Apply for the Mechanical Contractor Bond
The application can open with this bond already selected. You can still go back and change selections.
Last verified 2026-08-07. This guide is based on verified educational content and official sources.
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