How long does it take to install a window? It takes anywhere from 2 hours to half a day to fit a window. The time it takes to install the window will be altered depending on the size and type of window.

Installation Time Frames

A small of windows can take up to an hours with one installer. Whereas a large window can take up to 2 hours with two installers or 3 to 4 hours with one man installing. If you opt to install a window yourself, then these time frames will change, depending on experience.
A bow or bay window can take the longest to install due to their complex design. Bow or bay windows can take half a day to install with two installers. It is near on impossible to fit a bow or a bay window with just one person.