Issue removing Ngons from Interior im currently 3d modelling my first interior for a game for import into UE4 and im having issues with this particular situation. i have a complicated floorplan and want to add winodws and doorways without creating Ngons on the floor here is a picture to show an example 

I know i could add an extra edge on the floor but considering i am going to have multiple windows and doorways this can get messy and its for a game so the lower the poly count the better, thanks!
If low poly count is important then I would suggest you modify your workflow a little to something like the following:

First create your outer walls with window and door openings, then optimize this by merging vertices that are not doing anything to the ones that are. 



Next to create the inner walls use the solidify modifier. 

Apply this and then add the floor. 



Just realized that you said that you are only modeling interiors, so no need for solidify modifier.