All you need to know about Egress window Installation or replacement
The window must be openable from the inside without the use of keys, tools, or special knowledge.
If there is more than one sleeping room in a basement, a means of egress is required in each sleeping room.
It must provide an unobstructed opening with a minimum area of 5.7 sq. ft. (This requirement drops to 5 sq. ft. for grade floor or below grade openings).
The height of the clear opening must be at least 24″ and the width must be at least 20″.
The sill height must not be more than 44″ above the floor.
If the sill height is below grade, the window must have a window well.
If required, the window well must be at least 9 sq. ft. in an area with a horizontal projection and a width of at least 36″ each.
Window wells deeper than 44″ must have permanent steps or a ladder that do not impede the opening of the window.