maestro
Senior Member
In a low-rise residential neighbourhood, FSI can be one (but not the only) good measure of the compatibility of a proposal with its surroundings, although I'd be very reluctant to say that it defines a neighbourhood. Outside that context, FSI figures are interesting to know, but tend to be academic, often bear little relevance to the merits (or lack thereof) of a project, and are prone to site-specific quirks that makes evaluating or comparing FSI somewhat of a pointless exercise. When someone's argument for or against a proposal largely amounts to "but the FSI is x", that often means that they can't think of anything valid to say about the actual strengths and/or impacts. Good built-form, design and a strong assessment of impacts and contributions should result in an FSI that is appropriate by virtue of the planning exercise, not by virtue of a number and how that number compares to other numbers. FSI should flow from the planning analysis, and not direct it.
Sometimes, though, the FSI figure can jump out at you, and suggests (but does not conclude) that what is being proposed is very different than what has happened before.
I see FSI as the basis in creating a great neighbourhood with the desired amount of infrastructure and amenities. From there the built form, usages, heritage values etc. are established.
I find the majority of arguments in Toronto are centred on height and not how it pertains to FSI. The Pemberton Front Street proposal is a great example. This is one where allowing more height despite being out of proportion with the neighbourhood context would still better than the soul sucking garbage put forth. Of course, if only it would be identified as being too dense.