Abstract: A pet shelter construction 10 including a floor unit 11 having a solar heat reservoir 22 raised above the ground by runner elements 24 and supporting a concrete floor pad 20 which in turn supports an enclosure unit 12 having an enlarged window 38 formed in the southern wall panel 30 of the enclosure unit 12 for receiving solar energy and a moveable roof unit 13 dimensioned to selectively overlie the southern 30 and northern 31 wall panels of the enclosure unit 12 to vary the amount of solar energy transmitted through the enlarged window 38.