This 400 square foot cottage house plan is the perfect solution for an ADU or a vacation home plan. Pare down your belongings enough and you could even make this your every day home. Enter off the porch and step into the combined kitchen and living area. No walls separate the space front to back and the ceilings rise to 10. The bedroom is on the right and a pocket door separates the bedroom from the walk-in closet. The washer and dryer are tucked away in a closet between the bedroom and the open living space.