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This is the sort of housing project that you'd fully expect to find in Tokyo. Seven homes built on a small urban lot measuring only 11 feet wide by 93 feet deep. But in this case, it's not Tokyo; it's Chinatown, Philadelphia, where a residual lot that was created when the sunken Vine Street Expressway was carved through the middle of the city in the 1950s.
Designed by Philadelphia-based Interface Studio Architects (ISA), the project contains 7 levels of livable space. What's interesting, though, is that from a building code perspective this is still a 4-story building. There are two mezzanine levels that don't get counted (and that create some great double-height spaces). This also seems to be what allowed them to get away with a single egress stair in the middle of the building.
The other technique that was used to maximum density is facade projections. Philadelphia's zoning code allows for projections up to 3 feet in the horizontal dimension. And if you look at the above plans, you'll see that these were used to "top up" or extend the site's 11 foot width to 14 feet, when it made sense to do so from a programming standpoint. The result is some very livable spaces.
I am endlessly fascinated by these sorts of projects because they demand creativity and because you ultimately end up unlocking something that the market had been overlooking. Here is an example of a small leftover urban parcel that was previously used as surface parking for two cars. Now it's seven beautiful homes.
Photos/drawings: ISA
Dezeen recently featured the above project in Philadelphia by Interface Studio Architects. It’s called Powerhouse and the goal was to provide a variety of different housing typologies and tenures within a dense infill project that, at the same time, remains in keeping with its context.
The full block complex contains 31 residential units, which are a mixture of apartments, duplexes (stacked towns), live/work units, and single-family townhouses. There’s also a corner retail space. 10 of the units are rental and the balance are for sale. The development also incorporates 3 existing rowhouses on the block. (Were these the holdouts?)
Here is a diagram from ISA to give you a sense of how these different housing types come together:
The project feels germane to Philly’s urban fabric and it is certainly interesting in its own right. But for those of us from Toronto, it’s perhaps even more interesting because it’s a scale of infill development that we don’t see very often in this city: low-rise intensification. (Also commonly referred to as “The Missing Middle”.)
Recently I’ve been speaking with a number of people about whether or not Toronto should be thinking differently about its low-rise neighborhoods. Because as it stands today, even this sort of gentle density can cause quite a stir.
Two thoughts immediately come to mind – one of which will not surprise anyone who reads this blog. Firstly, I see laneway housing as an elegant way to intensify low-rise neighborhoods without changing their character. That’s why I’m proposing this house.
Secondly, I have long felt that we should rethink how we treat arterial roads that are not designated as “Avenues.” That is, we should encourage greater densities. An “Avenue” designation signals mid-rise. But absent this, our policies are frankly retrograde, given the way some of these arterial streets have evolved over the years.
What are your thoughts about this scale of infill?
Images: ISA
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