of occupants per dwelling decreased sharply: 3.24 in 1968, 2.65 in 1982 and 2.43 in 1999. The number of households of one or two persons increased between 1982 and 1999 and had an influence on the consumption of housing land, especially in the outer areas. Thus as the number of households increases the commune needs more housing to accommodate the same number of inhabitants. The primary residences are relatively recent: in 2017, 2,731 units or 10.4% predated 1945, 9,035 dated from the period between 1946 and 1970 (34.4%); 7,337 dated from 1971 to 1990 (27.9%), and 4,042 dated from 1991 to 2005 (15.4%). As for the number of rooms in these houses, 7.4% had one room, 14.4% had two rooms, 27.6% had three rooms, 23.1% had four rooms, and 27.5% had five or more rooms. In Antony the average price of real estate for sale in 2008 was about 4,270 euros/m2 and the average price of property for rent was EUR 17.39/m2/month. The suburban area covers of the city with a coefficient of occupation of land of 0.7. The municipality claims to be seeking to enforce a rule of 20% social housing but the communal social housing policy was challenged by an inter-ministerial mission during the summer of 2008. Many projects to rehabilitate social housing are underway but since 1990 there has been more destruction of social housing than creation. This is particularly the case in the construction of the "Grand Ensemble", "Parvis" (Breuil, Bièvre), "White City", and "Guillebaud City". The municipality also highlighted the renovation of buildings along the RD920 (ex RN20) to promote a continuous frontage and dormant urbanisation spaces which is presented as an attempt to maintain the number of inhabitants despite the national trend of decline in the number of people per family. Development projects The two main urbanisation operations in Antony are in the quarter of Croix-de-Berny and Noyer-Doré. Organized by the law No. 2003-710 of 1 August 2003. The national urban renewal program provided an unprecedented national effort to renovate districts in difficulty. It is in this context that the Noyer-Dore district, in the south of Antony, is under renovation. The PLU also provided for two new urban developments: the development of the Bas-Graviers/Crocheteurs district along the A86 and to the east of the city, the development of the Cemagref land near the Descartes school. The development work in Croix de Berny began in