What are some low/medium-density areas built in the last 60 years in Toronto that have a wonderful human-scaled public realm?
It’s possible that you’re equating great public realm with low/midrise by looking at neighbourhoods built in a very different time, under very different development pressures.
The St. Lawrence neighbourhood is certainly the gold standard in many ways; though one could fairly note, it was reliant for retail on adaptively re-used heritage on Front Street to a great degree; though Market Square also worked out pretty well.
The City proper has been mostly built-out for decades, and the SFH subdivisions in the outer reaches of Scarborough (the last large-scale completions) are their own problem.
Few would advocate replicating those.
If you did look for post-1990 areas, at any scale, for low-mid-rise, the former racetrack on Queen would come to mind. Its imperfect, to say the least; but in terms of basic
concept and feel it doesn't work too badly (midrise on Queen, compact SFH interior). We could perhaps all agree that a bit more midrise, say on Woodbine might have worked well;
That the Green-P grade parking is unfortunate, and that there are some design issues w/the midrises.....but I digress.
But, for all the shortcomings in the area noted above, I would take it 1,000 times over what we ended up with at Humber Bay Shores.
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Certainly, there are general design issues that we all discuss ad nauseum; from handle retail better to better materiality and glazing, to the need for greater granularity.
All of the above have been mucked up at a mid-rise level too; but they tend to be more impactful at a hirise scale, and harder to fix later too.