For smaller laundry areas with stackable units, the door is a great place to gain storage space. There are several types of over-the-door storage organizers available now. Not a fan of the pink but love the idea of this laundry room.
close up play room closet behind, utility room. open it like this to make laundry closet at the back door. Enclose the water heater. use space where w/d are now at right of door as a little built in seat for bags & coat hooks over it.