A window seat can be a compact couch where traffic flow is an issue, as in this tight spot in a sunroom with working French doors. Colorful, dressy fabrics give the bench a living room look, as do its furniturelike curved feet. A mix of plush throw cushions ups the comfort level without detracting from the tall windows behind it; cube-style coffee tables and small stools can be moved as needed to accommodate guests.
A mix of pillows offers a less bulky look than sofa cushions while still providing ample support when guests lean back.
Tip: Make sure to build your bench about 15 inches high to allow most people to sit comfortably, feet on the ground. A 3-inch cushion will bring the seat's height in line with that of most chairs.