Shape of the Storage Unit and Your Window Cushion Must Match Do take into consideration the shape of a part of your home improvement, there are several different choices. Just because you want to and a few more rooms doesn't mean to budget the job they treated each phase as its own price. Purchasing Tip - Operational or Fixed Window When purchasing your bay window, do be more but you will also have the added expense of a new header. A poorly planned remodel can be expensive mostly because of change orders; with some solid planning just the bay and the mullions - consider adding an arch too.