Johnson County Courthouse


The new Johnson County Courthouse in Olathe opened in January 2021 and will support the County’s judicial needs for the next 75 years. The project was delivered utilizing the design-build project delivery method with a Design Criteria Pack outlining project requirements for the design-build procurement and process. The 356,821 square feet, seven story courthouse building includes 28 courtrooms and judicial and administrative support spaces, family court, District Attorney and customer/public interface spaces, library, and jury/community assembly spaces.

In April 2017, Johnson County contracted with CGL and NGZ to begin development of the new courthouse. NGZ was contracted to serve as the Owner's Representative and CGL was contracted to serve as the Design Criteria Package Professional. CGL was also tasked to prepare the detailed operational planning and architectural programming of the project in conjunction with Johnson County Facilities Department.

Previously, in 2004, CGL had worked with Johnson County by preparing the Downtown Olathe Facilities and County Courthouse Study that defined the overall need for a new courthouse and modifications to other county facilities necessary as background for their long-term facility masterplan.

Johnson County, CGL, and NGZ set the project goals, budget timeline, and function and performance standards. The two firms work in tandem to manage the project deliverables and controls to hold the progressive design-build project team (JE Dunn, Fentress, and Treanor HL) accountable to the County.


2021 –  Best Project Award, ENR Midwest Best Projects.

2021 –  Award of Excellence, 2021 AGC of Kansas Awards. 

Take a Tour of the New Courthouse: