1850 N Leithgow StUnder construction

An eight-unit, four-story building is under construction at 1850 N Leithgow Street in Fishtown, cleared to build as of late June. The project, owned by 1850 Leithgow LLC, which picked up the 3,667-square-foot site in 2023, will include roof decks, rooftop access structures, and surface parking. The scope calls for full NFPA 13 sprinklering, a detail that signals serious fire-safety infrastructure rather than the lighter residential-only systems sometimes seen in smaller walk-ups.

The site sits in RM1 zoning, which allows multifamily by right with the right lot dimensions, and the project threads that needle without fanfare. Four stories and eight units on a mid-block parcel of this size represents efficient, pencil-sharpening urbanism—nothing outsized, but hardly background infill either. The presence of dedicated parking suggests the developer is threading a needle between transit-oriented density and market expectations in a neighborhood still finding its post-industrial equilibrium.

This isn't a one-off. Within a half-mile, roughly 460 units are in various stages of planning or delivery, including the 200-unit complex at 1635 N 5th Street and the 89-unit tower at 1832 Germantown Avenue. Closer in, projects like the nine-unit building at 1941 N Marshall and the 18-unit structure on Berks round out a dense development wave that's remaking the area's northern and western edges. 1850 Leithgow sits squarely in that current, adding modest density without the splashier fanfare of the larger projects nearby.

The real signal here is how comfortably a modestly capitalized LLC can step into a mid-block lot and deliver incremental density in a neighborhood where assemblage and rezoning battles once dominated the conversation. If RM1 parcels like this continue to pencil at eight units apiece, expect other narrow Fishtown lots—particularly those still hosting single garages or low-slung commercial remnants—to follow the same script.