average window replacement cost Aspectmontage Window Boston About 80% of the fetch of the plastic windows in Boston accounts towards the susceptible improve take advantage of and lens constituent, 10% - during window sills, frames, soffits, and sashes, and 10-15% - after the fittings. If you pick out to institute clayey windows in your apartment, you will have to budget on not only the window design price. Do not draw a blank back shipping and installation. We will total $ 30 to your order.