Love this idea for master bath doors. Fabulous solution when space is too tight for a standard hinged door. You can also put furniture on the walls next to this opening, just leaving enough space behind the furniture for the doors to slide.
Would be fun kid hideout space! Awesome dog kennel under the stairs design idea. If you want an indoor dog house, utilizing the space under the stairs for a cozy, attractive and practical space for dogs is a good idea! I love this design.