Bourgeois's first important architectural work was a group of houses in the Rue du Cubisme in Koekelberg (Brussels Region), showing the direct influence of the Dutch modernists. His largest project was built between 1922 and 1925 in Sint-Agatha-Berchem (Brussels Region) for a cooperative for social housing, the Cité moderne included 275 units. Each of them are oriented towards the sun, with a private garden, and were designed for low-cost construction with the use of reinforced concrete, an experimental technique at the time.
