It is also possible to site boxes in modern, prefabricated farm buildings, using battens, bolts and wire, but the need for a permanent means of access to the building for the owls is vital. If you are thinking of putting up your own owl box, it is important to think about every aspect when finding the perfect location, so to give you the best chance of getting a successful mating pair. Although barn owls have used oddest of designs, the style shown here has proven successful when placed in a variety of situations. If placed up beneath the barn's roof, there is no need to put a roof on the box. If placed lower in the barn or in an open-topped silo or tree, a roof must be installed to provide the necessary seclusion and protection from weather.
Construction is simple.
The sides are first fastened to the front and back and then the bottom is attached. If a top is used, it should be put on after the box is installed to facilitate easier nailing. Use exterior plywood if the box is to be placed in an exposed situation. Cover the bottom with one or two inches of wood shavings, as barn owls place no nest material. If placed in a barn, the front should face into the barn.