Our idea starts with the fact that “La Ferme du Buisson” (cinema theatre) has lost some parts in its south-eastern side and we propose to perform a “transplant” of a building compatible with the existing ones. In architecture, this addition must meet two requirements. The first is functional and technical, the original part must meet the new regulations and allow for an optimised functioning. The second requirement is formal: the extension must interact with the existing building with altogether continuity, rupture, and opposition. In this case, the extension of the cinema theatre is an opportunity to remodel it into a redefined and soundproofed auditorium, to make circulation more fluid by creating convivial spaces, and on the other hand, to entirely connect these remodelled parts to the new ones.