Chez Olive
The project concerns the energy retrofit and transformation of a mansion built in 1910 in Martigny by the architect François-Casimir Besson. Originally divided into several apartments, the house had been altered in the 1960s, undermining its original character. The intervention set out to rethink the spaces while respecting the architectural authenticity of the building. The main objective was to create a fluid spatial continuum around a central core that distributes and connects the various rooms of the daytime zone on the ground floor, while meeting contemporary needs. This open-plan layout maximises the spread of natural light by opening up cross-views between the different spaces.
One of the main challenges was to manage the structural constraints so as to achieve this spatial transparency without adding visible elements such as steel beams, which would have spoiled the purity of the volumes. The chosen solution consisted of a load transfer integrated within the thickness of the existing joists, allowing the original structure to remain legible and preserving the authenticity of the place. All the period's notable architectural elements were restored or reinterpreted in a spirit respectful of the historic building. The incoherent interventions of previous renovations were removed to enhance the heritage character of the house.
The new interior layout offers a rethought daytime zone on the ground floor, where the spaces flow freely around the central core, fostering visual continuity and great ease of circulation. This organisation lets light cross the entire level, creating a bright, open atmosphere throughout the day. Upstairs, the night zone was subtly reorganised, with a complete overhaul of the bathrooms, while respecting the existing volumes and the original spirit. Sober, timeless materials were selected to underline the simplicity and elegance of the spaces. The wall mouldings are highlighted by raised skirting boards and reworked window reveals, bringing out the rounded lintels in the spirit of the original window frames.
The joinery was designed simply and discreetly to preserve the purity of the spaces, and the solid stone stairwell was structurally reinforced without any visible intervention. Finally, modern features such as underfloor heating and thermal insulation were discreetly integrated to ensure the occupants' comfort while respecting the soul of this historic house.