Shannon Sheehan represents property owners in real estate tax assessment proceedings in Cook County and throughout Illinois. She also provides guidance on the latest county and municipal incentives available to industrial and commercial property owners.

Shannon leads real estate tax appeals for properties including office buildings, condominium complexes, all types of residential properties, and Class A, B and C industries facilities. She has experience with unoccupied and leased properties, as well as leasehold interests located on property owned by state and local transit authorities. Shannon has represented clients in the RETA appeal process at all levels, including assessors, Boards of Review, circuit courts, and the Property Tax Appeal Board.

Thompson Coburn’s RETA group has developed effective relationships with the region’s assessing officials, allowing Shannon and her colleagues to obtain significant results.

Shannon focuses in the area of Cook County real estate tax incentives for industrial and commercial property owners. She keeps in close contact with county officials to obtain the latest information on incentives, often surprising clients with new opportunities to lower their assessment ratios. This can ultimately result in a substantial decrease in tax liability, allowing businesses to use the saved revenue to create additional jobs, retain at-risk jobs, improve their facilities, or use the savings in any other way that helps their operations.

  • Loyola University Chicago, J.D., 2011
  • DePaul University, B.A., cum laude, 2008

Admissions

Bar Admissions

  • Illinois

  • Chicago Bar Association
  • Illinois State Bar Association

  • Listed in “Best Lawyers: Ones to Watch” (by BL Rankings) for Real Estate Law in Chicago, Illinois, 2024-2025
  • Included in “Illinois Super Lawyers” Rising Stars list (by Thomson Reuters), 2019-2022