Update: See a variant of these types of four-family apartment buildings in the Greater Ville.
Shenandoah Avenue has some amazing buildings, including these two four-family flats. They were built for the middle class, dispelling myths about these buildings being for low-income residents. Bob Reuter lived in the above building.
About how much square footage would each apartment have….it looks like a lot
They are large–I have a friend who lives in one of them and it’s over 1,000 square feet.