Politicians, tenants' associations and housing experts agree on the fact that too few apartments are currently being built, that supply is not meeting demand - despite an increase in building permits - that rents are rising in some cities - after 10 quiet years - and that low-income households are the ones who suffer - especially when they move house: There is disagreement on the diagnosis of the causes of the imbalance, and opinions differ widely on the housing policy options for keeping rents within socially acceptable limits. Changes to tenancy law alone are not enough. There is a lack of concepts to stabilize the housing market. While the stock of "old" social housing is shrinking from year to year, hardly any new social housing is being completed. They "pay off" sic.