Source: http://www.vcad.ca/sm-how-to-draw-a-city-in-one-point-perspective
Ok, let's take a look at what we can do to line things up. Some edges are missing; therefore, let's make straight edges to match up so that they hit the vanishing point. As we draw we should always have to keep an eye on it.
Lines are not as thick in the background because they are much further away. Add some creative details, but stick to the original plan. Get some contrast by shading details.
Let's add more details to the windows that are in the front part of the building. While I'm doing that I think about the creative part of the drawing -- what to add.
You have to be very careful with the edges -- hit the corners. You can make them lose as you move closer to the vanishing point.
Now I will add details to the building in the back here. I want them to stand out a bit so that they catch the viewer's eye. I don't want to add too many details.
We want to have something in the vanishing point that will grab the viewer's eye because that is where the viewers will be looking.
We already moved the center of the street twice; therefore, let's block it in. Draw the lines and hit the edges. Make sure they are not open.
Let's keep drawing the buildings on the right side of the street. Outline the buildings and add window shapes.
Add details and increase the pace as we move forward. We want the foreground to stand out. Think about the balance of the drawing while doing that.