I am aware of two neighbourhoods built with these homes in Ottawa, but there may be more: Sheffield Glen (the area around Southvale Crescent) and Queenswood Heights in Orleans (there is a row of these houses along Tenth Line between Tomkins and Amiens, and they were built in the area behind).
I do not have much information on these factory-built houses (or even where the factory was) other than what is described in the marketing ephemera below.
Both G.N.C. homes and Alcan Universal Homes (yep, Alcan used to build houses) had some identical plans that they built in Ottawa. Perhaps they were built in the same factory - just under different banners? Alcan also built in Georgetown, Ontario. If you know of anywhere else these homes were built in Ottawa or elsewhere in the country, let me know!
Notice how on most of the bungalow plans there is a thicker wall running down the centre of the house. They were most-likely built with a front and a back half - to be trucked to the site - and this mid-point would be where the two halves were joined on site.
The Capri design below appears the most obvious as a factory-built house. The bedroom section is quite narrow and looks as though it would easily fit on a truck to be transported to the site.