Club Atlético Osasuna has implemented the ‘Futuro Tajonar’ project, an 18-million-euro project to expand its sports complex. Therefore, Tajonar will add to its current facilities, which will also be reformed, a new stadium, two natural grass and two artificial grass fields, and a two-story building for the first team and the club’s front office.

The expansion will be on the land Osasuna recovered in 2021. The Tajonar Sports Complex will occupy 299,282 square meters, of which Osasuna owns 166,624; a 28,244- square-meter addition to the latter can be made if the Club’s General Assembly approves its purchase for 4 million euros, a price the Government of Navarre has already approved. The rest of the facilities are divided into 85,670 square meters owned by the Government of Navarre and leased to the club and 19,104 square meters loaned by the City of Valle de Arnguren for 20 years to construct a 600-vehicle parking.

The project is expected to begin in September 2025 and be inaugurated by the start of the 2027-28 season

One of the project’s centerpieces is the construction of a natural grass stadium with two stands on each side of the field and a capacity for 2,800 fans. If If suitable, the stadium’s capacity might be increased to 5,000 by adding stands on the end zones. The stadium will serve as the home field for Osasuna Femenino and Osasuna Promesas.

Osasuna will add two natural grass fields destined for the first team's training and will have a small covered seating area. Along these fields, a public restaurant for anyone to enjoy is planned. The project includes a two-story building next to the entrance and the fields. The first floor, 2,030 square meters, will be equipped with all the first team necessities: a gym, a medical area, a locker room, hydrotherapy pools, storage units, coaching staff offices, a video room, a dining hall, and a kitchen. This will allow the first team to move to the new building, and the club will reform the current facilities for the academy teams, especially Osasuna Femenino and Osasuna Promesas.