ENR Midwest Taps Treanor as Design Firm of the Year | Columbus Ohio Dump Trucks
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The firm, started as a two-person practice, has grown to have 175 employees.
A conference room is an element of one of Treanor's recent projects, the renovation of the Topeka City Hall, which was constructed 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.
Established in 1981 in Lawrence, Kansas, the firm was founded during an economic recession by Michael Treanor in his house as a two-person practice focused on designing schools, churches and small commercial projects. It has since grown into a nationwide firm serving a range of commercial clients across the U.S. Treanor currently has 175 employees and was one of ENR’s Top 100 Green Design Firms in 2025.
Through the 1990s and early 2000s, the firm broadened its reach, opening offices in Kansas City in 1996 and Topeka in 1999, and building a stronger portfolio in civic and preservation projects, including columbus oh dump truck work for the Kansas Statehouse. During this period, it also expanded its 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 rebranded simply as Treanor, reflecting the integration of various legacy firms it had acquired and its evolution into a unified, multidisciplinary practice.
Some of its Midwest projects include the Douglas County Judicial & Law Enforcement Center, Kansas City Proton Institute, Douglas County Treatment and Recovery Center, Kentucky Dept. 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 necessary licensures and creates a promotion pipeline that has allowed many interns to move into full-time staff positions.
Treanor’s 2025 revenue was $47.1 million. To find out where the firm ranks on the 2026 ENR MidWest Top Design Firm rankings checking out the May issue of ENR Midwest.
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Annemarie Mannion is editor of ENR Midwest, which covers 11 states. She joined ENR in 2022 and reports from Chicago.