I have 2 cats and no other room to put the litter boxes than in my living room. I know, it's not ideal to say the least, but this cabinet that hids the litter boxes seem to do the trick ! It is a simple Ikea Besta cabinet, I spray painted the legs in gold, added an oak top (I had some unused wood in my garage), and jigsawed 2 holes on each side, and boom ! I'll probably add some nice pulls or handles to complete the project though.
