I have divided the undecided part of the house into three sections. I walled of the first section along with one external door with glass bricks to form a laundry/work area. The middle section can act as a walk-in closet (almost, as it has a door that opens from the bathroom). The third section, the one with the windows, I made into a summer lounge. The middle section can have a frosted glass partition to make it more private (I haven’t made this partition in the model). The outer shell of the house is by Zach Simmons and I have done the interiors.