Matthew S. Duffy

Matt is a trial lawyer specializing in real estate, land use, and business litigation. He focuses on finding common-sense answers to his clients’ disputes and helps them reach their business objectives through the strategic use of both litigation and non-litigation methods.

Matt works with real estate developers, business owners, sand and aggregate producers, and landowners on a wide ranges of issues, including:

  • Environmental review and due diligence for real estate developments, land acquisitions, site repurposing, leasing and non-metallic aggregate mining and processing facilities;
  • Commercial real estate disputes and eviction/detainer notices;
  • Arbitration and mediation of franchisor/franchisee, commercial contracts, construction defects, and warranty disputes;
  • Landlord/tenant policy and procedure litigation;
  • Land use planning, including zoning and permitting;
  • Real estate and boundary matters; and
  • Commercial, business and general civil disputes.

Through his work, Matt assists clients with transactional and litigation matters, representing his clients in negotiations, dispute resolution, mediation and arbitration, court hearings, trials, council and board meetings, and at the Minnesota appellate courts.

Matt was named a “Rising Star” by Super Lawyers in 2020.


Commercial Real Estate
Represented a long list of landlords and tenants in various commercial real estate issues, most notably in eviction proceedings and unlawful detainer actions. Prepared both specific and general notices, as well as checklists and communication-driven material, for use by commercial clients in advance of potential litigation, and prosecuted and defended a number of actions and administrative proceedings when litigation did occur.

Industrial Sand Processing Facility
Worked with various local, state, and federal agencies to complete the permitting process for a client to construct and operate an industrial sand mining and processing facility in south central Minnesota, adjacent to the Minnesota River. After more than one year working through the permitting process, the client received the permits needed to mine industrial sand and complete construction of the facility to process industrial sand for various end users.

Aggregate Operations and End Use Planning
Represented a landowner and aggregate producer through the Alternative Urban Areawide Review (AUAR) process conducting an environmental review of property that was or is actively mined for sand and aggregate material. The AUAR is a critical component of the client’s end use planning. Eventually the entire AUAR study area will be phased out of aggregate mining and developed into end uses including residential housing, commercial and retail spaces, and office buildings.

Franchisor/Franchisee Dispute
Defended a franchisor client from a franchisee seeking more than $1 million in damages. Following a five-day arbitration, the franchisor successfully opposed the franchisee’s claims under the Minnesota Franchise Act, including claims for fraud and misrepresentation.

Encroaching Structure onto a Client’s Property
Defended a landowner who was sued by an adjacent property owner because the adjacent property owner built an office building more than 10 feet onto the client’s property. After a series of motions, a trial and an appeal, the client was awarded more than $750,000 in damages for the encroaching building.

Breach of Contract – Software Development Agreement
Represented a business start-up that engaged a software development company to develop a web-based customer tracking software. After numerous failed attempts to develop a workable software platform, the client sued the company for breach of contract and breach of warranty. Following discovery and motion practice, the parties engaged in mediation where the client was awarded in excess of $100,000 in damages, including a full refund of the software development fees.

Boundary Dispute
Defended a client’s property from claims by an individual asserting ownership to the adjacent parcel and a portion of the client’s property. After several motion hearings, two-evidentiary hearings, and numerous appeals to the Minnesota appellate courts and United States Supreme Court, the client’s ownership of the property and boundary line was confirmed. Following the conclusion of the litigation, the client was able to proceed with a sale of the property to several developers.


Areas of Practice

Business Litigation
Land Use Law
Real Estate


Minnesota State Bar
U.S. District Court – District of Minnesota


University of St. Thomas, B.A.
William Mitchell College of Law, J.D.


Minnesota State Bar Association
Hennepin County Bar Association


Aggregate & Ready Mix Association of Minnesota
International Council of Shopping Centers
Hospitality Minnesota

News & Events

MMB Attorneys Selected for Minnesota’s “Super Lawyers” and “Rising Stars” Listings for 2020

Recent Publications

Can I use my insurance coverage for COVID-19?

The Current Trends in ADA “Drive-By” Law Suits

Matthew S. Duffy

Rated by Super Lawyers

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