I built this dog house in '87. I have been trying to give it away for the last couple of years, but it weighs about 800#, so no takers. I widened the door, a little paint, and new shingles, and VOILA...I will add a lockable door, and I think I can just leave them out in the summers, and not have to carry then in every night. Inside of house is 40" x 40"