Taxing McMansions and other buildings by roof size to cover stormwater costs

Want a McMansion or another building that covers a lot of ground in Mississauga? You will have to pay more for stormwater costs:

In a move that’s a first for the GTA, Canada’s largest suburb and its sixth largest city will soon charge home owners and businesses for storm water costs based on how much of their property is covered. If you have a very small house that causes little run-off water, you will pay nothing. But if your home is in the highest of five size categories, it will cost $170 in 2016 for your share of the city’s storm-water management costs. It’s an approach that Toronto is also looking at ahead of its 2016 budget process, according to a city spokesperson…

Councillor George Carlson, council’s resident environmentalist, has championed the innovative approach since it was first examined in 2011. He recognizes the impact of climate change, but said development trends are also at the root of the problem. “You can’t use pipes the size of Dixie straws when we need massive concrete culverts,” he said after the meeting. “There were streets in Mississauga that looked like Venice in July of 2013 (when a major storm event wreaked havoc across the GTA).”

“But look at all the asphalt and parking lots and McMansions in this city. All of that covered land is sending more and more run-off water into pipes that were probably already too small. I can see the king and queen needing to live in a castle, but does every third person have to?”…

Charges to businesses will be based on a formula that measures the total covered amount of space, but they will be able to save up to 50 per cent of their fee by putting in measures such as catchment basins and permeable material to prevent storm run-off.

It will be interesting to see how this works out. The Councillor quoted above said he thinks this could have an impact on building sizes down the road. Communities with lots of sprawling development often have water problems and solutions range from permeable pavement to green roofs to taxes like these. But, many of these solutions are after the fact which can get quite costly (just see the massive Deep Tunnel project in the Chicago area).

If the real estate pressure is there to build McMansions, I wonder if there are ways around such a fee. (To be honest, $170 a year doesn’t sound like much for the types who buy McMansions.) What if people built underground to get extra space and to minimize the roof size (a la the luxury underground facilities in London)? Presumably there are height restrictions in the community that would limit building up.

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