Although plans for urban renewal after 1945 were largely based on clearance and redevelopment, the changed circumstances of post-war Britain also favoured a revival of interest in the repair and improvement of older housing. The article looks at the different approaches of Aneurin Bevan and Harold Macmillan, and at the reasons why only limited, if useful, progress was made. It stresses the significance of a repairs backlog in conjunction with the politics of property ownership and political conceptions of the conditions under which public money could be invested in urban renewal. In such considerations repair and improvement presented far greater difficulties than clearance and redevelopment, and this was an essential element in the continuing popularity of the latter method.