In 1910, when Calgary was in a period of growth, Parkdale was annexed. By 1911 two streetcar lines provided access to the sparsely populated Parkdale community. The Bowness streetcar line went from Centre Street through Parkdale to Bowness and the Grand Trunk line, and the Parkdale-Hillhurst cars had its terminal at the Parkdale loop on 34th Street N.W. On 7 March 1911 Alfred S. McKay with Parkdale's pioneer real-estate developers, Scott and Hartronft, created a subdivision known at the time as Parkdale Addition, in the area between 29th Street N.W. and 37th Street N.W. They envisioned a subdivision for Calgary's professional class on the streetcar lines. Between 1911 and 1913 they built six houses along the north side of Parkdale Boulevard including the Craftsman style Betz and Withrow residences — heritage houses with character that contribute to the historic residential streetscape. McKay and his partners also built five upscale, larger brick homes on 37th Street N.W., some of which are also heritage homes.