Image courtesy of Treanor
A conference room is one element of one of Treanor’s recent projects, the renovation of Topeka City Hall, which was built in 1939 under the Works Progress Administration.
Treanor has been named the 2026 ENR Midwest Firm of the Year, an award based on a company’s success in growth and revenue, innovation, support of the AEC industry and efforts to give back to its community.
Founded in 1981 in Lawrence, Kansas, the firm was founded during an economic downturn by Michael Treanor in his home as a two-person practice focused on the design of schools, churches and small commercial projects. Since then, it has grown into a national company serving a number of commercial clients in the US. Treanor currently has 175 employees and was one of ENR’s 2025 Top 100 Green Design Companies.
During the 1990s and early 2000s, the firm expanded its reach, opening offices in Kansas City in 1996 and Topeka in 1999, and building a stronger portfolio in civic and preservation projects, including work for the Kansas Statehouse. During this period, he also expanded his focus on public and institutional clients, particularly in education and government. The firm added science and technology design, historic preservation, interior design and civil engineering in the 2000s, along with establishing new offices in Dallas and Atlanta and launching a healthcare practice. In 2024, it was rebranded simply as Treanor, reflecting the integration of several legacy firms it had acquired and its evolution into a unified, multidisciplinary practice.
Some of her Midwest projects include the Douglas County Law Enforcement and Judicial Center, the Kansas City Proton Institute, the Douglas County Treatment and Recovery Center, the Kentucky Department of Juvenile Justice Master Plan, Pi Beat Phi Sorority at the University of Missouri, and the Topeka Municipal Juvenile Justice Center.
Treanor employees dedicated more than 1,400 volunteer hours in 2025 to support food security, education, health and local initiatives in the communities where they work. Treanor promotes architecture as a socially impactful career, pays for its designers to receive the necessary licenses, and creates a promotion pipeline that has allowed many interns to move into full-time staff positions.
Treanor’s revenue in 2025 was $47.1 million. To find out where the company ranks in the ENR MidWest 2026 Top Design Firms, see the May issue of ENR Midwest.
