The height of the box can be 14-15 feet from the ground. It Is very Important to check the house weekly in the Spring to keep Starlings and other undesirables out of the house. Straw or dry leaves are also acceptable. Screech owls will also use a Kestrel house and are desirable tenants. And Starlings will be persistent, so at least weekly checks of the house are necessary in the nesting season.
Ideal materials are rough redwood or cedar which last longer but are somewhat expensive.
Wood which is subject to warping can be stained or painted a natural color. Nails act as hinges to swing side open for cleaning and monitoring. Use half of entrance cut-out and attach with screw. A cleat above roof is optional but may hold the roof better in place and prevent rain seepage. Fasten hinged side closed with a wood screw.