My first urban sketch (Igreja de São Bento, Rio de Janeiro)

your background appears to be kind of flat and lacking dimensions.I believe this might be because all of your lines are of the same thickness. One thing that might help is working on the clarity of lines that you are putting down.

You collected a good amount of detail around the front doorway. I think this same amount of attention to depth with additional lines within the windows would help the flatness. If you're newer to 2point perspective I would suggest a more dramatic angle and utilize some lightly drawn guides to help you. Measure and mark out architectural elements to ensure proper scale. Great start, keep it up!

Thanks! Yes, I'm doing these urban sketches as an exercise on perspective