Housing estates

group of homes and other buildings built together as a single development

thumb|One of the housing buildings, with church in the foreground thumb|A view from block C to block B, with block A in the background thumb|Greenery on balconies thumb|Rooftop swimming pool Alterlaa () is a residential development in Vienna, Austria, designed by . Built from 1975 to 1986, it features distinctive set-backs on its lower floors and large terraces with planting troughs for use by residents. It houses around 9,000 people in 3,200 apartments.