I don't think that conclusion is correct.
1) A material portion of the buildings in question are TCHC and Co-op.
2) Most of the older buildings are governed by rent control and tenants who can't afford better will not be moving out to much higher rents.
3) There is a ceiling on what one can charge in an older building lacking ensuite laundry, dishwashers and air conditioning.
4) Where existing private rental buildings are demolished, the City will mandate replacement rental at current rents.
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To be clear, vacancies that occur naturally through people passing on, moving to Long Term Care or moving out because of financial success that permits that, will see those units rise in rent, the degree depending on how long term their tenancies were.
Also, there will significantly more units in the area in the future, and so it is reasonable to say that the percentage of low-income earners will decline, even if they remain constant overall.
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On the latter point, CreateTO has two sites adjacent to Flemingdon that will contain net new affordable housing in their mix. Also TCHC is likely to renew at least one of its TCHC communities, and I expect that will include net new affordable rental as well.