Minnesota contractor laws require most people doing construction, remodeling, or specialty trade work to be licensed or registered with the Department of Labor and Industry (DLI), to use written contracts carrying specific disclosures and statutory warranties, to carry liability and workers’ compensation insurance, and to follow strict notice deadlines for mechanic’s liens. Violations can bring administrative penalties of up to $10,000 per offense, loss of lien rights, and criminal charges for theft or fraud.
Who Needs a License or Registration
Minnesota does not issue a single “general contractor” license. What you need depends on the type of work and who the customer is.
Residential Building Contractors and Remodelers
Anyone who contracts directly with a homeowner to build, remodel, or repair a one- to four-unit dwelling must hold a residential building contractor or residential remodeler license from the DLI.1Minnesota Department of Labor and Industry. Residential Contractor Licensing The requirement reaches people who build or remodel for speculation or resale, including on their own property.2Minnesota Department of Labor and Industry. Residential Contractors, Remodelers, Roofers A separate residential roofer license covers contractors who perform only roofing.
Applicants pass a written exam covering construction law, building codes, and business practices, and must show proof of liability insurance. Contractors with employees also need workers’ compensation coverage. Continuing education is required every two years.
Contractor Registration for Other Work
There is no state general commercial contractor license, but registration is required. The DLI’s Contractor Registration Program applies to anyone providing a single specialty skill on residential projects and to commercial construction contractors who do not already hold a residential contractor license.3Minnesota Department of Labor and Industry. Construction Contractor Registration If a license is required for the work, get the license instead of registering. Some cities, including Minneapolis and St. Paul, add their own commercial contractor licensing on top of state registration.
Trade Licenses
Electricians are licensed through the DLI.4Minnesota Department of Labor and Industry. Electrical Licensing Basics Plumbers are licensed through the Minnesota Plumbing Board, which sits within the DLI and also regulates water conditioning installers.5Minnesota Department of Labor and Industry. Plumbing Board Both trades require apprenticeship training, journeyman experience, and trade-specific exams. HVAC and other mechanical work is licensed at the city level in places like Duluth and Rochester. Asbestos, lead abatement, and other hazardous-material trades carry separate certifications.
Lead-Safe Certification for Pre-1978 Housing
Contractors who disturb painted surfaces in housing built before 1978 must comply with the federal Renovation, Repair, and Painting Rule. Both the firm and the individual performing the work must be certified by the EPA, and firm certifications are valid for five years.6United States Environmental Protection Agency. Renovation, Repair and Painting Program – Firm Certification Homeowners must be given the EPA lead-hazard pamphlet before work begins, with written acknowledgment. This is separate from the lead disclosure rules that apply to sellers and landlords.
What Happens if You Skip Licensing
The DLI commissioner can issue administrative penalties of up to $10,000 for each violation, and each day an uncorrected violation continues counts as a separate offense.7Minnesota Office of the Revisor of Statutes. Minnesota Code 326B.082 – Penalties An unlicensed person who knowingly performs work requiring a license forfeits all mechanic’s lien rights, cutting off the main tool for collecting unpaid bills.8Minnesota Office of the Revisor of Statutes. Minnesota Code 326B.845 – Penalties
What Must Be in a Residential Contract
Residential building contractors and remodelers must provide written contracts for work on one- to four-unit properties. The contract must spell out the scope of work, total price, payment schedule, and estimated timeline, and it must set out the Chapter 327A statutory warranties as written warranty instruments.
It also has to include a pre-lien notice telling the homeowner that subcontractors and material suppliers may file a lien if unpaid. When there is no written contract, the contractor must deliver the notice separately within ten days after the work is agreed upon.9Minnesota Office of the Revisor of Statutes. Minnesota Code 514.011 – Notice A contractor who fails to provide this notice loses lien rights entirely.
For door-to-door sales, the homeowner has three business days to cancel, and the contract must include a bold-type notice of that right.10Minnesota Office of the Revisor of Statutes. Minnesota Code 325G.08 – Writing Required, Notice of Right to Cancel, Notice of Cancellation The rule applies when the contractor solicits at the residence, not when the homeowner initiates contact.
A separate rule targets storm-chasing sales tactics: a residential contractor paid from property or casualty insurance proceeds cannot advertise or offer to pay any part of the homeowner’s deductible, or offer compensation for inspections, claim filings, or referrals.11Minnesota Office of the Revisor of Statutes. Minnesota Code 325E.66 – Insurance Claims for Residential Contracting Goods and Services
Statutory Warranties on New Homes and Home Improvements
Minnesota adds automatic warranties to any sale of a new home or performance of home improvement work, and they cannot be waived by contract. The clock starts on the warranty date, which is generally the earlier of move-in or closing.12Minnesota Office of the Revisor of Statutes. Minnesota Code 327A.02 – Statutory Warranties
- One year: the home must be free from defects caused by faulty workmanship and defective materials.
- Two years: plumbing, electrical, heating, and cooling systems must be free from installation defects.
- Ten years: the home must be free from major construction defects.
For home improvements, major structural changes carry the same one-year and ten-year warranties, system installations carry the two-year warranty, and other work carries at least a one-year warranty against faulty workmanship and materials. All three periods are measured against compliance with building standards, not a general promise of perfection. The warranties must appear in the contract as written instruments; disclaimers or shorter timeframes buried in the fine print do not override the statute.
Insurance and Bonding
Licensed residential contractors and remodelers must carry general liability insurance covering damages connected with their licensed work, including products liability. Any contractor with even one employee, including part-time workers, must carry workers’ compensation insurance.13Minnesota Department of Labor and Industry. Work Comp – Who Needs Workers Compensation Coverage There is no minimum employee count. The only alternative is approval to self-insure from the Minnesota Department of Commerce, which requires proving financial capacity. Going without exposes the contractor personally to injured workers’ medical bills and lost wages.
Public construction projects exceeding $175,000 require both a performance bond and a payment bond.14Minnesota Office of the State Auditor. Contractors Performance and Payment Bonds The performance bond guarantees completion; the payment bond guarantees that subcontractors, suppliers, and laborers get paid. Some municipalities add their own bonding rules for specific trades.
Mechanic’s Liens and the Deadlines That Kill Them
Contractors, subcontractors, and material suppliers who contribute to a property improvement can place a mechanic’s lien on the improved property. The deadlines are unforgiving.
The lien expires 120 days after the last day of work or the last delivery of materials unless the contractor files a lien statement with the county recorder and serves a copy on the property owner within that window.15Minnesota Office of the Revisor of Statutes. Minnesota Code 514.08 – Filing of Lien Miss the 120 days and the lien is gone, no matter how much is owed.
Subcontractors and suppliers without a direct contract with the owner face a second requirement. They must send written notice to the owner within 45 days of first providing labor or materials, identifying themselves, describing their contribution, and estimating their charges.9Minnesota Office of the Revisor of Statutes. Minnesota Code 514.011 – Notice Skipping this step voids the lien. The notice lets the owner pay the sub directly and deduct that amount from what they owe the general contractor.
If the dispute continues after filing, the contractor can bring a lien foreclosure action, which can ultimately force sale of the property. Owners who believe a lien was improperly filed can challenge it, and contractors who file in bad faith risk liability for the owner’s damages and attorney fees.
Safety on the Job
Construction contractors in Minnesota must comply with federal OSHA standards and state requirements. Fall protection is the most frequently cited construction violation. Federal rules require fall protection anywhere workers are six feet or more above a lower level, including edges, holes, ramps, scaffolding, roofing, and excavations, with acceptable systems including guardrails, safety nets, and personal fall arrest systems.16Occupational Safety and Health Administration. 1926.501 – Duty to Have Fall Protection Employers must also maintain injury and illness records, and larger employers in high-hazard industries face electronic reporting for annual injury summaries. Every workplace injury also feeds into workers’ compensation premiums and can draw DLI scrutiny.
When Something Goes Wrong
Contractor Recovery Fund
The DLI administers the Contractor Recovery Fund for homeowners and lessees who suffer direct financial losses because of a licensed contractor’s fraudulent, deceptive, or dishonest practices, fund conversion, or failure to perform.17Minnesota Department of Labor and Industry. Contractor Recovery Fund Payouts are capped at $75,000 per homeowner and $150,000 total per contractor.18Minnesota Office of the Revisor of Statutes. Minnesota Code 326B.89 – Contractor Recovery Fund You have to get a final court judgment on one of the covered grounds first, with all appeals exhausted or waived, before you can apply.
Arbitration, Mediation, and Court
Many construction contracts contain arbitration clauses, which move disputes out of court and tend to be faster, with the trade-off of limited appeal rights. Where the contract does not require arbitration, either side can sue. The statute governing home warranties has its own dispute-resolution process. For a contractor pursuing unpaid amounts, lien foreclosure is the strongest tool; for an owner defending, challenging whether the contractor met every notice and filing requirement is often the most effective response. A large number of liens fail on procedural grounds.
Penalties and Enforcement
The DLI is the primary enforcement agency. It can issue correction orders, cease-and-desist directives, and monetary penalties of up to $10,000 per violation.7Minnesota Office of the Revisor of Statutes. Minnesota Code 326B.082 – Penalties The commissioner may forgive part or all of a penalty when the contractor corrects the violation within 31 days. Obstructing a DLI investigation adds $1,000 per day. Violating a commissioner’s order is a gross misdemeanor, and repeated or willful violations can lead to permanent license revocation.8Minnesota Office of the Revisor of Statutes. Minnesota Code 326B.845 – Penalties
Contractor theft and fraud are prosecuted under Minnesota’s general theft statute, with penalties tied to the dollar amount:19Minnesota Office of the Revisor of Statutes. Minnesota Code 609.52 – Theft
- $500 or less: up to 90 days in jail and a $1,000 fine.
- $501 to $1,000: up to 364 days in jail and a $3,000 fine.
- $1,001 to $5,000: up to five years in prison and a $10,000 fine.
- Over $5,000: up to ten years in prison and a $20,000 fine.
- Over $35,000 (certain offenses): up to twenty years in prison and a $100,000 fine.
The state attorney general can also bring consumer protection actions against contractors engaged in deceptive trade practices, a separate track of civil liability alongside DLI administrative penalties.