Hi + thanks.
the bench is 9 feet long and 2'- 4" deep. The window sill becomes the top of the back and on the long side it overhangs the back by 3"/ This allows the sloped back cushion to be held in place. The back cushion is 5" wide at the top and 6" at the bottom. The seat platform sits 13" above the floor, there is a 4" toe kick and yes there are drawers at the face. The wood is mahogany. Cost to replicate is tough to estimate. I was speaking with a custom cabinet maker today who said that he uses around $400/LF for base cabinets as an installed cost. So if you used that -- and said it was a little more complicated than a base cabinet -- maybe +/- $4,000. Upholstery would be extra. Drop the drawers the cost would be less.
Hope this helps.
Cathy