The Coignet house, completed in 1853, was the first concrete construction in France. France. Now in ruins, it is located in Saint-Denis, on the banks of the Seine, in a neighborhood undergoing major changes. The risk with such a site would have been to make it a heritage site, isolating it from the very complex urban context in which it is located, which is characterized by land pressure and an urgent lack of parks and green spaces.
Given this urban context, the project I proposed consisted in securing the very damaged building, by keeping only the four exterior walls, maintained from the inside thanks to a wooden frame. This choice made it possible to preserve the original concrete of the Coignet house, while avoiding the cost of a complete renovation. Once maintained and secured, the ruin of this historic building was integrated into the development of a small park of more than 4000 m² available to the inhabitants of Saint-Denis.