Neat floor and door. The addition has a separate entry with stairs to the second-floor family room. Built-in cabinets and drawers under the stairs provide space for storage and house a sound system. Shiplap siding and a brick floor keep the space casual.
Idea for area under stairs - Turn a hallway into a makeshift mudroom: If your home doesn't have a designated room for storing shoes, coats, backpacks, and the sort, built-in storage in your entryway will do just fine and make better use of the space.
hooks and board and baten attached to bench on brickwall opposite built in "lockers" ? Very simple and inexpensive way to create a mini mudroom. How to Install Board and Batten DIY Tutorial/perfect for mud room