This presentation examines the relationship between Eileen Gray’s distinctive drawing techniques and the spatial qualities of her architecture. It begins with Gray’s sketches for the Galerie Jean Désert in Paris, carried out (most likely with Jean Badovici) in 1922, and extends to her drawings for the houses E 1027 in Roquebrune-Cap-Martin (1926–29) and Tempe a Pailla outside Castellar (1931–35).