The Floor Area Ratio (COS) rules should be revised, to allow for taller buildings on smaller lots, and higher ratios further from the centre. We can’t keep decrying the lack of available housing while not allowing more verticality. Of course, there’s a limit to what’s an acceptable ratio in a medium-sized city with large annular suburban land opportunity such as Montréal: Melbourne’s CBD and inner suburbs had ratios as high as 32:1 until recently, leading to a real manhattanization problem; it has since been revised to max out at 16:1 — which is still significantly more dense than Montréal's very sparingly-applied 12:1.