The State aid amounting to EURÂ 6 922 121, unlawfully granted by the Netherlands on 1 March 2010, in breach of Article 108(3) of the Treaty on the Functioning of the European Union, in favour of Schouten-de Jong Bouwfonds, a partnership consisting of Schouten & De Jong Projectontwikkeling BV and Bouwfonds Ontwikkeling BV, in the form of a retroactive decrease of the sales price of land and a retroactive decrease of the agreed ground exploitation fee and quality fee agreed by the municipality of Leidschendam-Voorburg, is incompatible with the internal market.