I would agree that a bow/bay window would be a bad idea there. How big is the opening and what type of window are you going to use? When i say type i mean what material (vinyl, wood, fiberglass, aluminum, composite)?

+1. You don't want a bay window sticking way out over the sidewalk. That said, a bow would not project out too far if you really like that style. The question is if it is worth the substantial $ premium over a flat bank of windows. A 3-lite slider would look good there. It would still offer the drama of having a larger "picture" window in the center, and save some $ and add glass area. The existing configuration is very conventional, but the opening almost seems a little too small for it.

+2

Bow window with a slight projection might still fit but you can talk to your window contractor and they can give you projection dimensions.