Tomrommel! Why not print some at 50%, some at slightly different e.g. 45%, 53% etc.
That way you will get a more interesting street as the frontages won't be
a perfect straight line, nor will the roof tops.
Captain Darling Try one building, but choose one that naturally would be more imposing.
Something like a Pub or large shop. I often irritate my wife by pointing
out the 'scale difference' there is sometimes with real buildings. We have
a pub in Rugby that looks like a 15mm building on a 28mm war-games table.