The station was built by the Grand Trunk Railway in 1910 and was well-situated, with access to nearby streetcars and the Sunnyside Amusement Park.

The railway decided to close the South Parkdale station and build a new one at the foot of Roncesvalles Avenue, in the area commonly known as 'Sunnyside'.

The grade elimination project also removed a level crossing of Queen Street to the Lakeshore Road.

The following year a roadway bridge was built over the tracks immediately to the west of the station to connect the Sunnyside intersection with Lakeshore Road.

While CN's Hamilton train had stopped at Sunnyside, GO's Lakeshore West line bypassed the station resulting in a significant drop in its use.