852,987 Square Feet Industrial Building For Sale at 3800 Railport Parkway in Midlothian, Texas. There is a 823,782 SF of Warehouse Space, and 29,205 SF of Office Space across the 93.88 acres of land on the property. Ceiling Height within the Industrial Building is 51’9” to the eaves; up to 57’8” along the center line.