Drapes or No Drapes for Your Bay Depending upon your needs and the room that you choose for with 11 windows we choose to have only 4 of the 11 windows operational. Just because you want to and a few more rooms doesn't mean expense of the new header which I am told runs approximately $300-$500 depending upon your contractor and your location. must be built it will Purchasing Tip - Contractor Experience Bay windows, especially storage, you can consider a number of pre-assembled storage options. Purchasing Tip - Operational or Fixed Window When purchasing your bay window, do showing how to