Maison La Tourelle

An energy refurbishment study has been carried out for a historic villa located at 41 Avenue du Petit-Lancy (parcel no. 71), within the territory of the City of Lancy. This process is based on a team of specialized consultants and includes a preliminary cost estimate of the proposed interventions. In parallel with this study, the urgent renovation of the windows will be undertaken in order to address the building’s immediate needs while remaining consistent with the overall energy strategy.

Since 15 November 2022, the building has been listed in the inventory of properties worthy of protection by the Cantonal Council of State, with an orange rating, “monument and building of interest.” The villa was built in 1913 by the architect W. Egloff for a member of his family, Gottfried Egloff, and his wife Marie. It represents a significant architectural testimony of the early 20th century. The original typology, comprising three rental apartments, will in principle be maintained in its initial configuration dating from the time of construction.

The building’s architectural features, notably the yellow Neuchâtel stone surrounds, the entrance door and Jugendstil-inspired railings, as well as the Heimatstil-type roofs, contribute to its strong expressiveness and its recognized heritage value. These qualities argue in favor of insulation carried out primarily from the interior, wherever possible. This solution makes it possible to fully preserve the building’s external appearance, while carefully examining any potential constraints related to the interior decorative elements.

Any intervention will need to reconcile heritage preservation with adaptation to contemporary energy challenges. The energy renovation project will rely on best practices recommended by the Monuments and Sites Service (OPS-SMS) for protected buildings or those located within protected sites. The safeguarding of heritage and the improvement of energy performance will thus be fully integrated into a coherent and responsible approach.

Finally, careful consideration will be given to the reuse of materials whenever technically appropriate. This orientation will help reduce the ecological footprint of the construction work and ensure that the intervention follows a sustainable approach, respectful both of the site’s history and of current environmental requirements.