The suggestion stems from the EC's desire to encourage homeowners to put houses on the market and promote residential mobility. In this context, the bloc also suggests temporarily granting a subsidy to the most vulnerable families.

In its recommendations to Portugal, the European Commission states that there should be a "shift from transaction taxes to recurring taxation, including through an update of the property value of properties, which could incentivise homeowners to put underutilised houses on the market and encourage residential mobility."

The bloc also says that Portugal has recorded one of the "largest cumulative increases in nominal house prices in the last ten years, more than double since 2015," and that "affordability pressures are much higher in coastal urban areas" and that "structural imbalances between supply and demand persist."

According to ECO, the EC acknowledges that "investment in social housing has increased significantly in recent years, partly supported by European funds."