In the midst of a widely recognized rental housing crisis, the city is poised to approve conversion of more than 250 apartments to condominiums. The two conversion proposals are supported by staff because they meet city policies, and that makes it difficult to reject them because the owners will likely be able to successfully appeal.The larger of the two would see conversion of 128 rental units in the tower known as Effort Square at Main East and Catherine. It is managed by Effort Trust that owns or manages dozens of Hamilton apartment buildings. In addition to commercial uses this building contains “34 bachelor units, 69 one bedroom units, 24 two bedroom units, and one three bedroom unit”. The second proposal going before the planning committee on Tuesday would convert 124 apartments on Dundurn South at Chatham Street.