An establishing shot is showing Ellen's apartment building from the left side P.O.V. A couple of bushes are clearly obstructing the view from the downstairs apartment's windows, proving once and for all that---although there are stairs leading up to the building's entrance and thus, the first floor apartment is not exactly at ground level---Ellen's apartment is clearly the one upstairs; it is lit at night and its balcony view isn't obstructed by tall bushes. Furthermore, the first floor isn't high up enough to be at the same level with the top floor of the opposite building that is seen from Ellen's balcony.