This post contains affiliate links* Adding a bathroom, no matter how small adds value to any house. Here at the Mountain Cottage, more than adding house value, the World's Smallest Halfbath added much needed storage space in a very small bathroom. It's probably not actually the world's smallest halfbath, but but it is pretty small at only 17 square feet with an angled wall to boot! Even though we knew it was going to be small, we still needed it to function like a big bathroom, as far as…