With nearly 4,300 m2 and an irregular arc-shaped perimeter, the proposal integrally expands the complex, differentiating four zones in its north-south organization according to the program of needs: sports and garden area, covered porch, built area, and surface parking.

(1)The garden area prevents the new volume from being too close to the CEIP Trasmiera, maintaining its views and light conditions to the east. Additionally, it ensures that the proposal does not cast shadows on the sports court, while sheltering it from the prevailing southwest wind in winter.

(2)The courtyard constitutes the heart of the proposal, a filter between exterior and interior, built and natural. An entrance, stay, and welcoming piece. It is both a covered structure to protect from the climate and a space that embraces an open-air, interior, and more reserved garden.

(3)The built area is a compact three-story building, following the scale of the existing school, composed of a more public and versatile podium, along with two upper teaching floors that favor north-south orientation and avoid east-west light in the classrooms.

(4)Surface parking with 40 spaces + 5 PRM spaces, maintaining its position to serve both the sports courts and the new IESO. Additionally, an area dedicated to promoting sustainable transportation (bicycles, scooters) is incorporated, enabling autonomous travel for young people from different points in the municipality.

Organizational simplicity and ease of use prevail, avoiding residual spaces. The piece's hierarchy is transmitted to the interior space, differentiating uses by height: the ground floor houses the larger classrooms, common use programs, and administration, which also favor evacuation. The exclusively teaching use is concentrated on the two upper floors. This allows the construction of a functional, versatile building for the entire community. During the week, in teaching hours, the building functions in its entirety. Outside these hours, the ground floor can function independently and ensure security (compartmentalizable administration area and stairs). The areas facing the porch, especially the multipurpose classroom and workshops, could be opened to other users and visitors, encouraging the use of outdoor space (extracurricular activities, open houses, conciliation activities, etc.).

On a foundation of in situ reinforced concrete, a prefab concrete structure. This solution is fast, efficient, and very low maintenance. It reduces construction costs, in addition to generating less disturbance in the adjacent school and a smaller carbon footprint and amount of waste. It allows for high mechanical performance, with high material quality and obtaining a better balance between investment and benefits. The porch and fence structure are also planned with prefabricated elements. The facades are longitudinal, without kinks that hinder execution, and will be made of brickwork, providing homogeneity, sobriety, and simplicity of a well-known and durable material. Lacquered green aluminum carpentry is proposed, reflecting the natural elements and the color palette of the adjacent sports courts. The openings facing south will be protected by a double filter of deciduous trees and ceramic lattice similar to that of the main access.

Passive saving measures focus on insulation, energy self-production, and management by discriminating needs by floors. Inclined ceramic roofs are projected on lightweight partitions that can house ventilation machinery and 30º oriented photovoltaic panels. These are complemented by non-trafficable and landscaped flat roofs (with low-maintenance species) to improve the insulation of the ground floor rooms. The interior garden tempers the conditions of the more public use rooms; collects rainwater for irrigation of the entire plot and storage for fire protection installations. Lighting will be low consumption, generalizing presence detectors and a single BMS management system. An aerothermal system for cold and heat with underfloor heating is planned, distinguishing "heated spaces".