Profile
Legacy of Legal Leadership and Lobbying
The Duncan Law Firm, LLP carries a rich history that spans over eight decades in South Dakota. Originally founded in 1941 by John Zimmer in Parker, South Dakota, the firm has expanded its reach and influence, now operating a prominent office in Sioux Falls. Senior partner Dennis Duncan joined the firm in 1974 and has since established himself as one of the state’s most respected attorneys in the fields of government relations and business law. The firm combines the personalized service of a small-town practice with the sophisticated legal knowledge required to handle complex state-wide issues. Their longevity is a testament to their ability to adapt to the changing legal landscape while maintaining the core values of integrity and efficiency that have defined them since the beginning.
Government Relations and Lobbying
One of the firm’s defining niches is Government Relations and Lobbying. Dennis Duncan is widely recognized as a top lobbyist in South Dakota, representing clients before the State Legislature and various administrative agencies. The firm helps businesses, trade associations, and non-profits navigate the complex machinery of state government, drafting legislation and advocating for policy changes. This expertise makes them an invaluable partner for any organization looking to do business or influence policy within the state. Their deep understanding of the legislative process ensures that clients’ voices are heard where it matters most.
Estate Planning and Business Law
For individuals and families, The Duncan Law Firm offers comprehensive Estate Planning and probate services. They assist clients in preserving their wealth and ensuring their legacy is passed on according to their wishes through wills, trusts, and guardianships. On the commercial side, the firm provides robust counsel in Business Law, handling entity formation, contract negotiations, and real estate transactions. Whether facilitating a multi-million dollar business deal or helping a family navigate the probate process after the loss of a loved one, the attorneys bring a steady, experienced hand to every matter.
- Legislative Advocacy: Strategic representation at the South Dakota State Capitol.
- Probate Administration: Guiding executors through the legal distribution of assets.
- Real Estate: Handling commercial and residential property transactions and disputes.
Experienced Civil Litigation
In addition to transactional and legislative work, the firm maintains an active Civil Litigation practice. They represent clients in a variety of disputes, including will contests, insurance issues, and general business conflicts. The team includes attorneys Drew Duncan and Amanda Engel, who bring additional expertise and energy to the practice. Located in a quiet professional park in southern Sioux Falls, the firm offers a discreet and professional setting for clients to discuss their most sensitive legal matters. With a track record dating back to the WWII era, The Duncan Law Firm stands as a pillar of stability and excellence in the South Dakota legal community.
Specializing In
Legislative Lobbying, Estate Planning, Business Formation, Will Contests
Address & Location
Located in the Garden Village neighborhood in south Sioux Falls, just south of the 69th Street and Minnesota Avenue intersection.
Building Location
The office is located in a modern, single-story Class A commercial office building on W Landscape Pl, situated near local businesses like Boen & Associates and Van Horn Financial Services.
Suite Access
Enter through the building’s main front entrance. The office for the law firm is located on the ground level in Suite 101, offering immediate, step-free access.
Parking Details
A free public surface parking lot is available directly in front of the building’s entrance for clients and visitors.
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