Quote:
Originally Posted by UrbanImpact
You can be in an urban environment in a 1 or 2 story home, doesn't need to be 30 story building.
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Functional urbanism is hard to do exclusively with detached SFH's with yards.
The math just doesn't add up.
Especially with today's small average household size.
The typical American suburban default is the age old 1/4 acre lot (~70'x150').
At scale, that's 4 units per acre x 480 acres (640 acres per sq. mile minus 25% for streets) = 1,920 housing units per sq. mile.
1,920 housing units x 2.6 average household size = 4,492 ppsm
Even if we halfed that lot size to a more old school, long and skinny streetcar suburbia lot at 35'x150' (~1/8 acre), that would still only add up to 9,982 ppsm.
And these are all idealized figures, in the real world they would all be lower.
The general rule of thumb we've long used on SSP is that functional urbanism doesn't really become likely until you're around the 20,000 ppsm threshold, which is why you only find real functional urbanism in areas with a high degree of MFH (or those super-tightly packed old school philly-style rowhouse neighborhoods).
Streetcar suburbia levels of population density are certainly a notch above conventional suburbia in terms of walkability, but when every household in a given area demands their own separate house on its own separate lot with its own yard, things simply get pulled too far apart for functional urbanism to exist at any kind of scale.