Forgive us for getting overwhelmed by the “Running Up That Hill” wave, the 1985 Kate Bush hit that is experiencing a recent renaissance thanks to its inclusion during an intense Stranger Things scene. As we were rocking out to our favorite atmospheric avant-pop anthem while cruising past 417 Callowhill St. this weekend, we couldn’t help but stop our car and run up that hill (or up N. 4th St.) to get a closer look at something we hadn’t seen before for this project we told you about first in May 2021.


Hello, construction trailers! After doing a bit of digging, it sure seems like it will be all systems go soon enough. As a reminder, this 220-unit project featuring 68 car spaces and 75 bike spaces will consist strictly of residential space, with its CMX-3 zoning nixing any sort of commercial component, likely due to the lack of foot traffic on Callowhill in the area. While we are bummed that there won’t be a greater street presence, we are excited for the injection of density to what is now a one-story building which houses an electrical supply company and an adult care center. Permits are in hand for demolition and construction, and according to a Facebook post from Domus Construction, work on this Linden Streets Investments-developed project should start in the fall. Shall we remind ourselves of the current state and what’s to come for this Bernardon-designed building, which is now called The Keystone?

Why, are those construction trailers we see?
Current view of the site looking northeast from 5th & Callowhill
A rendering of the seven-story tower from the same spot
View of the site from 4th & Callowhill
Future view from the same corner
An aerial shows the development in context of the neighborhood
A landscaped courtyard offers a break from the traffic outside

This is such a huge upgrade for this stretch of Callowhill, which can act as a bit of a raceway given its position near several on-ramps and off-ramps in this highway-centric part of the city. If this seems to you like an odd spot for development, we beg to differ. Immediately across N. 4th St., a recent subdivision offers some hope that yet another residential project may join the fold. And if you jump across N. 5th St., The Block at Sono is complete and looking solid. This ISA-designed building contains 49 units and multiple retail spots, so momentum is certainly building in the area. It will be quite a different feel for North Old City/Southern Northern Liberties in the near future and we couldn’t be more excited, especially considering that this Pittsburgh-based developer is yet another non-local entity that sees Philadelphia’s awesome potential. Now if only they could do something about that pesky Social Security parking lot up the block…

An activated rooftop has multiple areas for everyone to relax, with a pretty darn good view, too
Current view of the northeastern corner of 4th & Callowhill - could we see something rise here?
The massive parking lot of the Social Security building close by would be a prime redevelopment opportunity