With no measurements how would we even begin to guess . Is all that will be there a garage ? An egress window needs to actually lead to the outside not into a garage. You need to post measurements and alot more info

It cannot be called a bedroom if it does not have an egress window to the outside. And why would someone want to use a room where a solid wall is 3’ from the window? Check if there is a requirement for distance outside the window in your community. The space is supposed to allow for a firefighter in full gear to get in or out through the window of a bedroom.

Contact a local architect that will be able to gather the information required to get you what you need.