Business Details
Trusted Legal Representation in South Dakota Since 1889
Established in 1889, our firm has provided legal services for over 125 years, representing individuals, corporations, and partnerships across South Dakota, North Dakota, and Wyoming. Our attorneys possess extensive trial experience in state, federal, administrative, and tribal courts, with five attorneys boasting over 50 years of legal expertise each. We specialize in corporate law, family law, civil litigation, employment law, property law, and trusts and estates, combining deep local knowledge with global legal capabilities.Our team includes members of prestigious organizations like the American College of Trial Lawyers and Chambers USA, ensuring clients receive counsel grounded in both tradition and innovation. We prioritize client needs through personalized service, leveraging technology to deliver commercial advantages while maintaining a commitment to ethical practice and community leadership.
Services
Corporate Law
Family Law
Civil Litigation
Employment Law
Property Law
Trusts and Estates
Real Estate
Tax Planning
Personal Injury
Criminal Defense
Highlights and features
- We offer over 125 years of legal expertise in South Dakota and the Midwest.
- Our attorneys have decades of combined trial experience in federal and state courts.
- We combine local market knowledge with global legal capabilities.
- Recognized in Chambers USA and Best Lawyers of America for excellence.
- Specialized practice areas include corporate law, trusts and estates, and complex litigation.
Associations and certifications
- Best Lawyers of America
- Chambers USA
- American Board of Trial Advocates
- American College of Trial Lawyers
- International Association of Defense Counsel
Services
Corporate Law
We handle all aspects of corporate law, from incorporation to complex shareholder disputes. Our attorneys structure corporations to meet client needs, manage limited liability issues, and resolve investor ownership conflicts. With experience in mergers and acquisitions, we provide strategic guidance for businesses of all sizes.
Family Law
Our family law practice addresses divorce, child custody, and other sensitive legal matters. We combine empathy with legal expertise to resolve disputes involving property division, alimony, and parenting plans. Our attorneys stay current with evolving family law statutes to protect clients' rights and interests.
Civil Litigation
We represent plaintiffs and defendants in civil litigation matters including contract disputes, personal injury claims, and property conflicts. Our trial-tested attorneys employ strategic negotiation and courtroom advocacy to achieve favorable outcomes in state and federal courts across the region.
Employment Law
Our employment law team resolves disputes between employers and employees involving discrimination, wrongful termination, and wage disputes. We provide litigation support and mediation services while helping businesses implement compliant workplace policies to prevent legal conflicts.
Trusts and Estates
We create customized estate plans using South Dakota's favorable trust laws. Services include drafting wills, establishing asset protection trusts, and handling probate proceedings. Our attorneys also assist with trust administration and litigation involving contested estates.
People
Heather Lammers Bogard
SD State Bar President (2023-2024)
Recognized leader in legal innovation and client service, Heather Bogard brings extensive trial experience to complex legal matters while serving as a trusted advisor to clients across industry sectors.
Jonathan P. McCoy
Attorney
Experienced trial attorney with a track record of successful verdicts in civil litigation, including a notable not-guilty verdict in a high-profile case demonstrating strategic courtroom expertise.
Garrett J. Keegan
Attorney
Skilled litigator focused on achieving favorable outcomes for clients through thorough case preparation and effective advocacy in both state and federal court proceedings.
Phillip R. Styles
Attorney
Seasoned legal professional with deep expertise in corporate law and transactional matters, providing strategic guidance to businesses navigating complex regulatory environments.
Reece R. Weber
Attorney
Award-winning young lawyer recognized for outstanding contributions to legal practice, combining fresh perspectives with rigorous analysis to deliver innovative client solutions.
Questions
What areas of law does Costello Porter specialize in?
We specialize in corporate law, family law, civil litigation, employment law, property law, and trusts and estates, with additional expertise in real estate, tax planning, and criminal defense.
How long has Costello Porter been in business?
Our firm has provided legal services since 1889, making us one of South Dakota's oldest continuously operating law firms with 125 years of experience.
What geographic areas do you serve?
We primarily serve South Dakota, North Dakota, and Wyoming, with attorneys licensed to practice in multiple state and federal jurisdictions across the Midwest region.
Are your attorneys recognized for legal excellence?
Yes, our attorneys are listed in Best Lawyers of America and Chambers USA, with membership in prestigious organizations like the American College of Trial Lawyers.
