The minimum size required is 36 inches (91.44 cm) wide and deep. If the window shuts outside the space should let it be fully shut.
If the window is more than 44 inches (111.76 cm) in depth from the ground level, a ladder has to be permanently anchored and cannot interfere with the window opening. The escape has to be readily accessible and simple to operate. Avoid using long heavy curtains or blinds to protect against a individual’s ability to move through the opening.
Basement egress windows are a window that offers a safe exit in the building or home. When an owner terminates a house or remodeling a room, residential construction codes require exit window. The windows are created for effortless escape, and also to facilitate the entrance of firefighters and other rescue workers. The demands of basement egress windows take into account the accessibility to children and adults. The maximum dimension between the floor and the bottom of the opening is 44 inches. Note that this is not far from the base framework, but rather from the window opening.
This gallery is about basement egress windows.