The national average cost of residential window installation is $5,400, or between $3,000 and $8,500. Labor costs $150 to $800 per window or about $40 an hour. A single, standard-sized window averages from $300 to $1,200. Custom units or bay styles can be $2,000 or more.
Cost factors include:
Window design or style.
Custom work.
Material price.