[4][5] Lacaton often visited Vassal in Niger, who worked there as an architect and town planner; they built their first joint project, a straw hut.

The project, a bare bones reclamation of an art deco building near the Seine, was short-listed for the EU Mies Award in 2003.

The team cut away most of the thick façade's panels, installing balconies and large sliding windows in their place, opening the apartments to more natural light.

[12] The practice has also worked on the École Nationale Supérieure d'Architecture in Nantes; the art collection project FRAC Nord-Pas de Calais in Dunkirk; the Cap Ferret residential building in Cap Ferret,[13] and the Grand Parc Bordeaux (with Frédéric Druot and Christophe Hutin).

Lacaton's designs and constructions support human use rather than iconic display, concerned with the people involved.