Egress Windows: frequently asked questions
These answers are general. For your situation, check the official sources listed below or ask a professional.
What makes a window an egress window?
Under the residential code, a minimum net clear opening, minimum width and height, a sill no higher than 44 inches, and a window well with enough room, plus a ladder if it is deep.
Do I need a permit?
Yes, cutting a foundation wall and adding a window require a building permit.
Can my existing window be enlarged?
Often yes, by cutting the wall below it and adding a new well.