Cat litter box cabinet for garage. Cat enters thru cat door from house. Clean out thru doors on garage side. Keeps the mess and the smell out of the house! Side vents in the cabinet let in light and keep it a bit fresher.
Minimalist IKEA Cabinet Hack, and lots of other ideas on hiding a litter box. Not just for the litter box but for a dog's or cat's pet bed, when company is over or just during the day, just shut the door and it won't have to be seen until bedtime.