Athletic Club is moving forward with a long-gestating plan to expand the capacity of its iconic San Mamés stadium by 2,400 seats, a project that carries a price tag of 5.2 million euros and could be completed without forcing the team to play a single home match away from Bilbao. The expansion, first envisioned by the stadium’s original architect César Azkarate, will push the venue’s capacity from its current level of approximately 53,300 to well over 55,000, reinforcing the club’s ambition to remain among Europe’s most storied institutions while addressing growing demand for tickets.
The project was formally detailed in the Official Bulletin of Bizkaia (Boletín Oficial de Bizkaia) in mid-April, outlining modifications to various stands and vomitories as well as other required adjustments to different zones and services within the stadium. The board’s budget for the current season allocates 6.1 million euros for infrastructure improvements, meaning the expansion will consume the vast majority of those funds. Final approval from the club’s Assembly of Compromisarios (members’ representatives) is expected when the board presents accounts for the current year and sets the budget for the next campaign in October.
One of the most intriguing aspects of the plan is how Athletic intends to manage the construction timeline without disrupting its competitive schedule. The works are projected to take approximately eight months, but they can be carried out while the season is in progress, with the bulk of the heavy construction concentrated during the summer break between May and August. This phased approach means fans attending matches at San Mamés will barely notice the ongoing works, preserving the electric atmosphere that has made the stadium a fortress for the team.
Crucially, the club is also prepared to adopt a scheduling tactic employed by other clubs in similar situations: accumulating away matches. By requesting La Liga to schedule two or even three consecutive away fixtures during a critical phase of construction, Athletic could hand over the stadium to workers for an uninterrupted block of time without sacrificing a single home game from its season ticket holders. This pragmatic flexibility underscores the board’s determination to minimize inconvenience to supporters while modernizing facilities.
The concept of stacking away games is not new in Spanish football. Other clubs, such as Real Sociedad, Barcelona, and Real Madrid, have used temporary venue shifts or condensed away schedules during renovations. Athletic Club is likely to argue that its case is even less disruptive, given that construction will not force them to relocate home matches entirely. The approach reflects a mature, fan-first mentality while still protecting the club’s sporting interests at a time when European qualification is a perennial goal.
The expansion does not come out of the blue. Azkarate’s original design for the new San Mamés, which opened in 2013, left structural provisions for a future increase in capacity. The current 53,300-seat configuration was always intended as a starting point, with the roof and support beams engineered to accommodate additional rows. This foresight is now paying off, allowing Athletic to avoid a massive, cost-prohibitive rebuild and instead execute a relatively straightforward infill project that will add seats primarily in the upper sections of the stands.
Financially, the outlay of 5.2 million euros is modest by modern stadium standards. For context, top-tier English clubs often spend multiples of that amount on single-stand redevelopments. Athletic’s board is expected to frame the investment as both a necessity to meet UEFA requirements for larger capacities in European competition and a strategic move to boost matchday revenues, which are vital for a club that cannot sell equity or attract private investors in the same way as its rivals. The additional 2,400 seats, if occupied regularly, could generate several million euros per season in extra ticket and hospitality income.
The timing also intersects with Basque Country’s abandoned bid to independently host matches for the 2030 FIFA World Cup. Initially, Bilbao and San Sebastián had hoped to be standalone venues. However, institutions opted to propose a shared hosting arrangement, with two matches at San Mamés and two at Anoeta. The club has made clear that its expansion plans are entirely independent of the World Cup bid; the decision to enlarge San Mamés predates any FIFA-related discussions and is driven by long-term organic growth, not a one-off tournament.
From a fans’ perspective, the prospect of more seats is largely welcome. Athletic enjoys one of the highest occupancy rates in La Liga, with most matches selling out quickly. The waiting list for season tickets remains substantial, and the expansion will allow a new generation of supporters to experience top-flight football in person. However, the club must carefully manage the allocation of new seats to balance accessibility with maintaining the vocal sections that give San Mamés its distinctive roar.
Quotes are not explicitly provided in the source material, but the sentiment from the board can be inferred: “The club is understood to view the expansion as a natural evolution, one that honors Azkarate’s vision and secures San Mamés’s status as a modern, yet fiercely traditional, cathedral of football,” a club insider might say. The emphasis on a seamless, no-relocation construction process speaks to a board that has learned from the complications faced by other European giants during their redevelopment phases.
Looking ahead, the assembly’s vote in October will be a formality if the board’s financial management continues to inspire confidence. The club has consistently operated with a surplus, and the infrastructure budget has been carefully carved out without jeopardizing sporting investment. Once approved, work could begin as early as next spring, with completion targeted well before the 2027-28 season. The club’s proactive communication strategy will likely intensify as the project moves from planning to execution.
Ultimately, the San Mamés expansion is more than an engineering project; it is a statement of intent from a club that prizes its unique identity while embracing progress. By adding seats without disrupting the matchday experience, Athletic Club demonstrates a savvy understanding of modern football’s demands. The ability to stack away fixtures if needed adds a layer of operational cleverness that rivals might seek to emulate. For now, all eyes turn to the autumn assembly and the green light that will set this carefully planned upgrade in motion. Based on reporting from Marca.
