For my puppy in my NY house! Homemade dog feeder, made from a slab of oak. Sliced from the log with a chainsaw, then the holes for the dog bowls were chiseled out by hand and the bowls set inside (and, that's my puppy).
Hidden dog crate - no DIY instructions as this is for sale but can totally DIY this for less! If I ever got another dog I am so doing this, no crate in house, no dog bed spread over the floor and I'd have space to display :D
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.