Descriptions of domestic interiors abound in the Balzacian novel, and answer the need to give a new order to undifferentiated social space whose values are unstable by delineating a private space capable of sustaining individual and collective identities under the banner of a harmony between a subject and its environment. Nonetheless interior spaces do not always resist social chaos, whose disorder ends up investing them : the description of interiors thus becomes characterised by an overload in heterogeneous objects, according to a principle of chaotic transversalism, which undermines the determinism behind the social classification of individuals. Confronted with this aporia, the Balzacian novel seems to put in place a new criteria based on the personal imprint an individual leaves on his private space, which reveals a distinctiveness different from that given by social stratification.