To meet the demands for social housing, Nasuvinsa has launched a Rental Housing Plan of Nearly Zero-Energy Building (NZEB). It is planned to build 524 social rental housing objects with an estimated cost of around 80 million euros, 50% of which will be financed by the European Investment Bank. Construction of the first phase of the plan (185 units) will begin in November this year, while the second phase (339 units) will begin its construction in June 2018. The objective of the Plan is to satisfy the actual demand for rental housing with NZEB objects that meet the regulatory requirements foreseen for year2020 in Navarre. We have to take into account The Energy Performance of Buildings Directive 2010/31: The main requirements of these regulations are those relating to the implementation of NZEBs (Near-Zero Energy Buildings) in close future, starting from 31 December 2020 for all new buildings and from 31 December 2018 for all new buildings that are occupied and owned by public authorities. At the moment, there is a specific definition of an NZEB (Near-Zero Energy Buildings) in national legislation. That definition should include the following concepts: - Isolation- Thermal bridges- Mechanical ventilation with heat regeneration- Airtightness- Energy efficient finish carpentry All these criteria are defined and limited by the Passivhaus standard. That is why Nasuvinsa will build all the houses under its Social Rental Housing Plan according to the Passivhaus standard. This way, the abovementioned houses will comply with the requirements that will come into force in 2020.