Professional window fitting companies, glaziers, or handymen install windows. Labor to install windows costs $100 to $1,000 per window on average, depending on if you hire a professional window service company or a handyman. Most companies and handymen charge lower rates per window when replacing all the windows in your home at the same time.
Popular companies that offer window installation and replacement services include Andersen, Pella, Marvin, Window World, Champion, Home Depot, and Lowe's.