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Home : Egress Window Code Basics Of Egress Window CodeExplore the basics of egress window code, including number of exits, width and height requirements, distance from the ground and much more. There will be variations in the state or county in which you live so ALWAYS contact a professional contractor or refer to the building codes in your city or county to learn about the exact egress basement requirements. Discover pricing for your project with our egress window estimator. If you have egress window cost or project questions, ask our site editor and get the answers you need! Email your questions to Bill
Number Of Basement EgressBasements that are used as living spaces are required by law to have at least one emergency escape route, which can either be a window or door.
Locking MechanismsAn egress window or door must be able to be opened from the inside without having to use a key or other tool.
Window WellsThe exterior window well must be large enough for the window to open completely. The window well needs to have horizontal dimensions of at least 9 square feet and at least 36" of horizontal projection out from the house.
Ladders And StepsIf the window well height is more than 44" there has to be a permanent ladder (or integrated steps) attached to the well. The inside of the ladder rungs needs to be at least 12" wide. Window Distance From The GroundThe bottom window sill should be no higher than 42" (44" in some counties and states) from the finished floor. This placement is low enough to the ground to allow a child to crawl out of the window.
Egress Net Clear OpeningWhen the egress window is opened, it must provide 5.7 square feet of net clear opening. This provides enough space for an adult or child to enter or exit. It also provides enough room for a firefighter to enter with their gear and equipment in case of a fire. The requirement goes down to 5.0 square feet if the window is at grade level. Below you will see the minimum egress window size for each type of window, although none of these minimums provides the required 5.7 square feet of net clear opening so the windows will have to be larger than these minimums in each case.
Casement Code RequirementsCasements must meet the following minimum window sizes for code - 20" wide & 24" tall. However, this minimum sized window does not provide the required 5.7 square feet of net clear opening.
Slider Window Code RequirementsSliders must meet the following minimum window sizes for code - 4' wide & 4' tall. However, this minimum sized window does not provide the required 5.7 square feet of net clear opening.
Double Hung Code RequirementsDouble hungs must meet the following minimum window sizes for code - 3' wide & 5' tall. However, this minimum sized window does not provide the required 5.7 square feet of net clear opening.
Single Hung Code RequirementsSingle hungs must meet the following minimum window sizes for code - 3' wide & 5' tall. However, this minimum sized window does not provide the required 5.7 square feet of net clear opening.
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