Brooklyn Daily Eagle, October 8, 1885 ("Houses")
Most of the buildings are still standing, but they were long ago reconfigured from single-family use to "flats over stores":
We might find it surprising today that someone would have once built single-family residences in 7th Avenue, which is today an almost exclusively commercial street. No doubt when these buildings were constructed, however, Lansdell envisioned that 7th Avenue would become more like the street that 6th Avenue is today, with single family houses intermingled with mixed-use, commercial/residential buildings on the corners. We have already seen how C. B. Sheldon constructed in 1888-89 a primarily residential row of flats with corner store, just to the south of Lansdell's row.
It is likely that 7th Avenue "tipped" to exclusively commercial use quite early. Many of the buildings across the street were developed as mixed-use from the beginning, as opposed to starting out like Lansdell's row in single-family use and then having shops retrofit later into the first two floors.
Two of the buildings at the Carroll Street end of the row were later demolished to make way for the Chase Bank building that stands there now:
The buildings are clearly "historic", although heavily modified. Are they worthy to be included in the Park Slope Historic District? We think so. One need only look to buildings further north in 7th Avenue, within the existing Historic District, to see that heavy modification is no impediment to inclusion in a historic district: