The rebuilding of the region continued after World War II. The region's first multi-storey flats were built in the 1950s, although these were mostly built in the larger towns where space for housebuilding was already very limited. Some of the region's population was rehoused in the new town of Telford in Shropshire which was developed mostly in the 1960s and 1970s, or in expanded towns like Redditch in Worcestershire. The largest housing development in the Midlands during the postwar era was the Castle Vale estate in Birmingham. Many inner city areas and town centres became less densely populated as a result of this continued regeneration of housing.