What is the smallest size permitted for an egress window?

The smallest size permitted for an egress window typically varies by building codes, but a common standard is a minimum clear opening of 5.7 square feet. The window must also have a minimum height of 24 inches and a minimum width of 20 inches. These requirements ensure that the window provides adequate escape and ventilation in case of an emergency. Always check local building codes for specific regulations, as they can differ.