Athletic Club are planning to expand San Mamés Stadium by adding around 5,000 new seats to meet growing demand. The iconic ground, already one of the best in Spain, has been regularly sold out for big fixtures.

The club’s consistent performances and exciting squad have brought renewed energy to the fanbase. As young talents like Nico Williams and Oihan Sancet shine, more fans want to be part of the matchday experience.

The expansion is set to begin in early 2026, pending city approval. It will also include updates to hospitality areas, accessibility, and fan engagement zones.

Athletic are proud of their fan-owned structure and see this as an investment in the club’s community and legacy. The move also helps position them to host future international events.

The project reflects the growth not just of the team, but of the Bilbao football culture itself—alive, proud, and ready for the future.