I find extending edges (Stick Building) to shape a model or part of a model kind of
fun. It is best used when you can stick (no pun intended) to the X-, Y- and Z-axes
and are adding a relatively small part onto an existing structure, such as this
extension on the back of a shop. The result looks like Wireframe Mode but without
Modeling often involves the use of several modeling methods. You may start out
with the Face Extension Method (Box Modeling), as was the case here, and then
switch to Stick Build. The Edge Extension Method (Poly-to-Poly) involves extensive
use of the Loop Cut and Slide Tool as does the Loop Subdivide Method. One object
may be modeled with one method while with another you use a different method.
Modeling can be a mix and match of methods, whatever works or strikes your fancy
at the time.