Senior Project - Developing Buildings

Here is my process for developing the background buildings so far. This will be more refined as the designs become final. But I thought I'd share how I've been creating these buildings, perhaps mostly as a way to keep track of it myself.
Try to ignore perspecive issues; this was done quickly and freehand. This is just a basic setup.

This process could also work for a row of buildings, where the design of one building flows into the next.