What's it Made of?
Depending on its look and function, a seat can be constructed of hardwood, plywood, MDF, or even kitchen cabinetry.
DIY or Hire a Pro?
Handy homeowners can use stock cabinets or construct a sturdy open or enclosed bench out of lumber and plywood. Consider calling in the pros for an exact match to a room's existing millwork or a challenging configuration, such as a curved bay window.
What's it Cost?
A 3-foot-long DIY window seat costs as little as $100 for one with open storage underneath or $350 for one made with stock cabinets. For custom, expect to pay from $1,000 to $3,000, depending on the size and design.