The project to increase the height of plot 3056 forms part of the transformation of the Augustins neighbourhood, which is characterised by gradual densification and the regeneration of public spaces. It involves two buildings: Dancet, which retains its original architectural character and is raised by one storey, and Carouge, which is restructured and raised by six storeys. A redeveloped communal courtyard becomes a genuine shared living space.

The project enhances the volumetric coherence of the block. On Rue de Carouge, the first eight storeys extend the profile of the neighbouring buildings, whilst the top two, set back, form a new crown. On Rue Dancet, the set-back extension ensures harmonious integration and anticipates the neighbourhood’s future development.

The courtyard has been reimagined as a shared space, structuring the new circulation routes and encouraging interaction between residents. It helps to preserve sunlight, views and the quality of the homes whilst supporting the increase in density.

The approach clearly distinguishes between the two buildings. The Dancet building is preserved in its original form. Recognised as a testament to an era of architectural experimentation with precast concrete, it is insulated from the inside to preserve its street-facing façade, whilst the extension emphasises its crown with a contrasting design. The Carouge building is undergoing a complete transformation, with a new façade, generous loggias and more open-plan flats, offering a variety of layouts and a stronger connection to the courtyard – a necessary passageway providing access to the two new stairwells. This design provides dual-aspect flats and resolves fire safety issues.

The works prioritise a lightweight structure using composite timber-concrete floors, combined with localised reinforcement of load-bearing elements and foundations. This strategy minimises the loads on the existing structure whilst ensuring the feasibility of the extensions.

The project anticipates future developments in the block to ensure a coherent evolution of the urban frontage, balancing densification, the preservation or introduction of architectural qualities, and the long-term sustainability of the existing buildings.