Imagery of a house can be described by the outlook or overall design of the exterior walls and windows. One could acaccomplish his simply by using descriptive words to describe the look of the walls, in a way that the reader could picture it in their head.
It would show that you didn't just read something from one source and believed it. When researching it is good to read around and see different results or if the information may be the close to what you gathered elswhere etc.