The new Mercer County Criminal Courthouse is a four-story, 141,000 Square Foot facility, designed to relate and complement the existing historical surroundings. The facility houses eight courtrooms, various hearing rooms, and a Special Proceedings courtroom for larger trials and grand jury court. Essential components such as high-level security, a tunnel connection to the existing courthouse, and provisions for future connections and phases will also be incorporated. The beginning phase of the project required the demolition of the current parking garage and detention facility, as well as the relocation of the existing steam lines and chilled water lines.

The project has been designed to achieve LEED certification using energy-conscious construction methods, including a district heating and cooling system.