Here's another new finding gleaned from the Real Estate Record and Builders' Guide. The RERBG issue of April 6, 1901 carries news of plans filed by prolific Park Slope builder Louis Bonert for four 4-story, 8-family "tenements" (i.e. multi-family housing), on the south side of 3rd Street between 5th & 6th Avenues. Bonert's architect here is Thomas Bennett, who designed a great many Park Slope apartment houses from around this same time:
"Projected Buildings," RERBG v. 67, no. 1725 (April 6, 1901): p. 634. -468- 3rd st, s s, 247.8 e 5th av, four 4-sty brk tenements, 32.2x90, 8 families; cost, $72,000; L Bonert, 6th av and 3rd st; ar't, T Bennett, 198 53rd st.
The first of the row, all of which still stand in virtually unchanged condition, is shown below:
Louis Bonert is of course well-known to long-time readers of this blog; we suspect he built more housing in Park Slope than any other developer. We had a hunch these buildings were erected by Bonert, although we never had any concrete evidence before now. In part our suspicion was based on the unusual tripartite windows on the first floor; other examples from Bonert's buildings are found directly across the street.