After the Second World War the goal was to produce a lot of dwellings for the people. In this moment in time the quantity was important. Now the visions are changing and the (sustainable) quality of the houses that are built becomes more important. This leads to problems for housing corporations, when they on the one hand have to provide housing for lower incomes and on the other hand have to invest to meet the sustainable desires. In this research there was looked at the different conditions that play a role during the decision moment if a post- Second World War housing complex is suitable or not for sustainable upgrading. This leads to the introduction of a decision table to advise the housing corporation make the choice.