In the depths of the Great Depression of the 1930s, the Toronto Daily Star ran a regular feature on expensive new houses that were being built. I’m not sure whether this was so its readers could imagine what it was like to live in a house that large, or what.
Here’s an example from the March 29 1934 edition:

I looked on Google Street View to see if I could find the house. I discovered that 14 Rosemary Lane is a mirror image of this diagram. I don’t know whether they decided to build it the other way around or whether this drawing was simply flipped. I suppose that it’s also possible that Forsey, Page and Steele, architects, designed two houses that were identical except for being mirror images of one another. But I don’t think that would go over very well.
I searched in the Toronto city directories and discovered that B. B. Kennedy was not the original occupant of the house, but its builder: the 1934 city directory lists Byron B. Kennedy as having that occupation.
The 1935 directory lists 14 Rosemary Lane as being under construction, which fits the timeline of this article. By 1936, the house was built and was occupied by Edgar B. Knapp, a mining executive. He was still there in 1943. By 1950, the house was owned by Alex Samuels, the vice-president of the Reliable Toy Company Limited; I didn’t trace it after that.