Can basement stairs exit through a garage, instead of leading into the house?
Agree with Guy.
Yes, you can. However the drawbacks are significant if this is a retrofit. If you are building new, then you need to ensure the door and any exposed interior wall facing the garage is sealed completely. Also means your door must be a 34" RSO Aluminum storm door (exterior door). Two reasons, first for gas sealing. Second, because the garage is a "cold zone" (unheated) and you, by Code, must have an exterior door used when a doorway separates a cold zone from wqrm zone.
Hope that helps.
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