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Brian J. Banahan has been practicing law in DuPage, Kane and Cook County Illinois for many years. He began his legal career and learned his way around the courtroom in 1997 as a full timetor with the Cook County State’s Attorney’s office. From there, Mr. Banahan moved to serve as chief legal counsel and Deputy Public Administrator for DuPage County for 17 years. In that job, Mr. Banahan managed, administered, litigated, settled, and closed hundreds of decedent’s estates and an extensive number of related legal matters in nearly every area of the law. In the process, he has recovered, liquidated, litigated, accounted for, and distributed tens of millions of dollars in assets of every kind. He also gained a lifetime’s worth of invaluable and practical experience in a broad range of practice areas.
Throughout his 17 year tenure as Deputy Public Administrator, Mr. Banahan also remained very active in the private practice of law handling matters for hundreds of private clients in the areas of Civil Litigation, Family Law, Probate Law, Real Estate Law, Estate Planning and Elder Law, having obtained favorable settlements, verdicts, judgements and closed cases, transactions, and estates of all shapes and sizes, for hundreds of loyal private clients.
In 2006, while maintaining his position as chief legal counsel for the Public Administrator, Mr. Banahan, left the firm of his private employer after 8 years of service as managing partner, and opened the Law Offices of Brian J. Banahan, LLC, focusing his private practice in the same areas of law that he has practiced in both the public and private sector throughout his career, namely, Probate, Family Law, and Civil Litigation. Dedicated to giving honest advice and focused on solving client’s problems, the firm has thrived since its’ inception.
In 2014, Mr. Banahan joined forces with friend, colleague, and law school classmate Chris Haas to form Banahan & Haas. The firm was established in order to better serve the growing demand for both attorneys services in both DuPage and Kane Counties, and is dedicated to the same level of client service and the principals of professionalism, experience, integrity, and results, that Mr. Banahan and Mr. Haas have achieved, practiced, and honored since they began their careers.
Mr. Banahan is a member of the DuPage County, Kane County, and Illinois State Bar Associations and lectures on Estate Planning, Estate Administration, and Family Law. He lives with his wife and three children in the far Western Suburbs of Chicago, Illinois.
Honesty, integrity, and professional expertise are the hallmarks of Mr. Banahan’s law practice. Mr. Banahan has spent his entire career solving difficult legal problems in both the public and private sectors with dedication, sincerity, and respect for his clients. His diverse background and years of professional experience enable him to assess legal situations quickly, give good, honest legal advice, and obtain real results for his clients. Mr. Banahan remains personally involved with and oversees every case that comes to the firm. He has always maintained an outstanding record of client satisfaction and loyalty.
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Chat withState: Illinois
Acquired: 1998
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22 S. 4th Street, Suite 5, Geneva, IL, 60134
1730 Park Street, Suite 117, Naperville, IL, 60563
10 Client Reviews
Showing 1 - 5 of 10 reviews
Posted by Monica | December 14, 2025 | Hired Attorney | Wills & Living Wills
Easy to work with
I recently had some changes made to my will. Brian and his excellent paralegal Erin patiently explained the process. He is very caring and helpful with all the steps and details. I wouldn’t hesitate to recommend this firm for your estate planning needs.
Posted by anonymous | May 27, 2025 | Hired Attorney
Attorney review
I cannot begin to say how surprised and amazed I was to not only find/hire a very knowledgeable/experienced lawyer, but he comes with genuine care about the cases. In today's world too many people work for personal green paper - Mr. Banahan is there to HELP with winning the truth and defeating the ...
Posted by Betsy | October 15, 2024 | Hired Attorney
Power of attorneyand a will
I could not believe how professional, friendly, and fast the Banahan law office was. They did an amazing job.
Posted by Michele | May 23, 2024 | Hired Attorney | Estate Planning
Mrs.
Excellent advice for estate and trust fund. Easy to talk to and explains everything. You will not leave his office with any unanswered questions. Very helpful staff. I would definitely recommend Brian Banahan for any legal work or advice.
Posted by Brijesh | May 21, 2024 | Hired Attorney | Real Estate
Out of state transaction process.
I have used Brian Banahan’s firm for multiple real estate deals over the years. I am out of state and it was very smooth with how everything went and I was very happy with the outcomes each time. His fee is very reasonable and I value his expertise in these matters.
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15 year service award, DuPage County
2014 - Present
Partner, Banahan & Haas
2006 - Present
Owner, Law Offices of Brian J Banahan LLC
1998 - 2014
Deputy Public Adminsitrator, Deputy Public Administrator Dupage County
1998 - 2006
Assistant Attorney, Law Office of Paul Didzerekis
1998
JD - Juris Doctor
1995
B.S. Political Science
English