The Historic Landon House - This historic building has been structurally renovated and has an open floor plan for many uses. Up to 9,151 sq ft is available on the first, second and upper level floors and can accommodate an event facility, restaurant, medical or traditional office users. Landon Crossing in Urbana, MD - Building A & B Available for lease are two proposed office/retail buildings at Landon Crossing in Frederick (Urbana), Maryland. Both buildings are proposed to be 7,300 SF on two-stories (4,472 SF on the 1st floor and 2,828 SF on the 2nd floor), and the owner would be willing to accommodate and build a 9,000 SF building for a single user prior to construction. Located in Frederick (Urbana), Maryland at the prime signalized intersection of Urbana Pike and Route 80.