In 2020, Union Saint-Gilloise appointed a team of architects: ESA and KSS, who have extensive experience in the construction of soccer stadiums, both in Belgium and abroad.  

In 2023, the club organized, in collaboration with the Brussels Bouwmeester (Chief Architect) and the Brussels Region, an architectural competition aimed at ensuring a project that takes into account the local context and the needs of residents and local associations. The Brussels-based firm Baukunst won this competition. The firm Bas Smets is responsible for the project’s landscape integration.