This riding lost territory (36%) to Don Valley North, and gained territory from York Centre (16%) during the 2012 electoral redistribution. The reduction in land area of the riding was primarily facilitated by substantial population growth along Yonge Street where the on-going redevelopment of land into additional high-rise residential buildings continued with medium-density development (low-rise residential buildings and townhomes) occurring slightly further from Yonge Street and along Sheppard and Finch Avenues. The portion of the City of Toronto north of Highway 401 and east of Victoria Park Avenue (the former boundary with Scarborough) was allocated an additional riding now having five ridings versus the previous four.