As I embark on adding details to the house, I do have some options for how to attack the modeling. Let's take the example of a window. I could continue to use the Loop Cut and Slide and Extrude tools to slice up new edges on the existing cube and make the windows part of the already existing mesh.
All my work would be contained in a single object, the cube:
The existing cube could be cut up and the details, such as windows, could be modeled as part of the same mesh
Looking ahead, however, I can see that this particular window is a common element of the house. I can see it repeated not only on the front of the house but the other sides as well:
The same window is repeated throughout the house.
If I modeled the windows as a direct part of the existing cube, I would have to repeat my modeling steps for each window. That would not only add to my modeling time...
