I wouldn't put a coop more than 18-24 inches up because I'm short and don't want to have to climb to reach into it.
Your height may vary.
If your coop is solid like the one shown, I suggest pulling the boards out of the gable end and replacing them with hardware cloth -- adding awnings as needed to keep rain out. Ventilation and elbow room are key to keeping chickens in good health.

If your coop is solid like the one shown, I suggest pulling the boards out of the gable end and replacing them with hardware cloth -- adding awnings as needed to keep rain out. Ventilation and elbow room are key to keeping chickens in good health.
