When it was acquired in 1923 by the perfumer François Coty from the politician and industrial Louis Loucheur, the house was found to be subject to a grave disorder because of the sinking slope on which it was built. François Coty called upon the architect Charles Édouard Mewès, son of Charles Mewès (1860–1914) to displace it several meters. This radical solution saved the building from erosion of the slope, which would have entirely destroyed it within the next few years. The move was accompanied by profound transformations: the mansard roof was converted into an attic sheltering five bedrooms, while vast dependences were created in the basement to arrange a perfume laboratory, an electric generator, kitchens and a swimming pool.