For the convenience of our customers and homeowners throughout the greater Rockford area, Window World of Rockford proudly serves all of the areas surrounding Rockford, including Loves Park, Roscoe, Winnebago, Freeport, Byron, Rochelle, DeKalb, Sycamore, Elgin, Crystal Lake, Belvidere and more . Whether you’re in the market to replace your windows, doors or siding, Window World of Rockford is your local leader for all of your home improvement needs.