Here is a heated cat house that you can control with your smartphone. The PetNF Heated Outdoor Cat House has 6 adjustable temperature levels (86 to 131F) and 6 timer settings (2 hours to always on). This cat shelter has a wind and water resistant design. Its heated pad has a footprint of 13 x 20″, so it can warm multiple cats.
The entire house measures 13 x 20 x 15″. It is made from non-toxic PVC. It can handle cats and small dogs up to 35lbs.