The Ultimate Cat House is a heated house with the 3 most popular options, Square Window, infared bulb, door upgrade. ULTIMATE RED & WALNUT $319.00 LARGE ULTIMATE RED & WALNUT $359.00 ULTIMATE WALNUT&RED $319.00 LARGE WALNUT & RED ULTIMATE $359.00 LARGE ULTIMATE NATURAL $339.00 LG ULTIMATE CEDAR LG DOOR $429.00 ULTIMATE STONE HOUSE $369.00 LARGE ULTIMATE BRICK $419.00