This large cat house is great for that colony of cats, it especialy gets them out of the way of predators when they go to the top level. Between the two houses they will house up to 4 averaged size cats. The extra lounging deck acts as a generous porch roof that helps shield the doorway opening from dripping rain and melting snow. The upper deck of this outside cat house is great if your cat just needs to get away or just enjoy bathing in the sun. It is insulated with a Thermal-Ply insulation that not only keeps your pet warm in the winter, but also gives them a cool place to relax during the heat of the summer. Each House Exterior: 24" x 23" x 19" (D x W x H) . Each House Floor: Interior: 19" x 18" (L x W) . Each Door Opening: 7" x 9" (W x H). Lower Deck: 16" off the ground with a 22" x 9" lounging deck. Upper Lounging Deck: 36" from the ground with a 22" x 9" lounging deck. Total Heighth from ground is 46".