I was born at 41 Addison Road (in Hove near the Seven Dials) in WW2. I grew up in the knowledge that the reason that our section of about a dozen houses on the north side all had their front doors four or five feet higher than the road and pavement outside was due to the road incline being levelled down lower after they had been built in the early 1900s. All these have a flight of steps up to the front door in the way of houses that would normally have a basement. The road work should have been done first. The properties on the south side opposite have no steps as they were built after the road work. I wonder if this ever happened anywhere else?