Lehigh County Courthouse Courthouse Addition BRINJAC has been commissioned to provide all of the engineering services for the Lehigh County Courthouse Addition. The project includes a new 90,000 square foot, eight story addition adjacent to the existing eight story courthouse. The project also includes major renovations throughout the existing courthouse. The new courthouse includes five (5) new courtrooms, law library, and numerous other county agency space. The Basement area of the new addition will include mechanical space and an underground parking garage.