You can buy a "light and ventilation" easement across your neighbor's property for guaranteed unobstructed lot line windows. It prohibits them from building taller within the first 15' back from the lot line (or whatever distance code requires for building separation).
Also, Rozas Ward is the architect for both 425 Notre Dame and 700 Magazine, so I'm sure this issue is being resolved somehow.
According to 425's website, it looks like they are "
revising the floorplans", i.e. reconfiguring the units so they don't rely on lot line windows.