Council house building in the first decade following the end of the Second World War was extensive; with more than 37,000 new homes being completed between then and the end of 1954. These included the first of several hundred multi-storey blocks of flats. Despite this, some 20% of the city's houses were still reported to be unfit for human habitation. As a result, mass council house building continued for some 20 years afterwards. The existing suburbs continued to expand, while several completely new estates were developed.