There are major factors that determine the cost of a siding replacement in Westford. These factors include the type of siding that will be used, the size of your house, the repairs and preparation needed, other materials, tools, equipment, and the labor cost. There are many sidings available today. You can choose from a wide variety of siding options that will suit your needs. There are insulating siding like aluminum, vinyl, and fiber cement. There are also sidings made from stone like granite and wood like redwood and fir faced siding. It has been estimated that insulating siding can cost around $3 to $7 per square foot. Stone sidings are estimated to be $22 up to $62 per square foot. Fiber cement can cost $.50 to $3.50 per square foot.