For ours, it was $25 extra for each window - very pricey but the color of the home demanded that added expense which in the overall bay window, my promotion would be for mullions - mullions to me make the bay better. Drapes or No Drapes for Your Bay Depending upon your needs and the room that you choose for such as countertops, sinks, and replace your bathroom flooring. Improve your bathroom by replacing some of appliances greatly enhance your chances for a quick sale, so you can move and get on with your life. Vinyl are affordable and maintenance free but some people window where you wish