Later two lateral wings were added to the main building.
The structure of the phalanstère was composed by three parts: a central part and two lateral wings.
The body is large and situated centrally between the lateral wings.
It is formed of a central section featuring five large arched windows, and two lateral wings.
The last extension was carried out from 1924 to 1928 and added a second lateral wing at the other end of the nave.
The lateral wing away from the canal is narrow and therefore only has a half mansard.
The first floor is jettied, as are the gables of the two lateral wings.
Its central section was on two levels, and it had two lateral wings, with adjacent service buildings.
The lateral wings have two storeys and a single bay.
The internal faces of the lateral wings have fenestration similar to that in the main block.
