When I was trawling Streetview for the above links, I saw around four properties that I suspect had the name Clifton Cottage. I came to the conclusion that it was most likely the generic name that the builder had used to identify the style of the property (much as builders do today when selling 'off plan').
Wiki informs that the area Clifton Hill was named by the developer after one of the first properties in the area, Clifton Farm. I think that its a fair assumption that the Clifton Cottages name was initially based on this.