SDM was set up in 1981.

The first office was located in the 12th district of Paris, on the rue de Fécamp. SDM now owns 12 centres: 9 in Paris and 3 in the suburbs.

24 years ago, this type of business did not exist and everything had to be set-up from scratch.

The registered address facility was only recognized in 1985 under decree 85/1280.