Epsilon Euskadi is the Motor Racing Research Center for Innovation and Technology that integrates three activities: 1) Design: R & D & I and production of state-of-the-art race car, team management 2) Racing: team competition at Le Mans 24 Hours, World Series by Renault, Formula Renault 3.5, Eurocup Formula Renault 2.0, Megane, Karting, and aims for 2011 Formula 1, 3) Further Education: offers a Master’s degree in Motorsport Engineering. Areas for vehicle production and maintenance is located on the ground floor. Research, education, design and management areas located on the first floor. Two large interior patio, one above the factory site and the other on the race car maintenance workshop, allowing interior visual communication and provide a large amount of natural light into the interior of the building. Abundance of natural light in contrast with the solidity, the appearance is almost blind, that the building presents to the outside, and that protects the confidentiality of the work going on inside. The facade was designed from prefabricated concrete panels. A glass textiles (Texturglas-type) includes black stick on the concrete panels, with the goal of building a formal analogy with one of the most common material used by the client: carbon fiber. Outside, the building volume is strengthened by the wide porch to the car racing team truck and a large canopy covering the areas of visitor access, both the entrance and car parking. To highlight the three building entrance – visitors, personnel and services – a red box with rounded corners was again used. Chart used colors – red, white, black, silver and gray – is based on the color of the client company. Tunnel site, an important part of the tour visitors’, has been designed and lighted dramatically – with indirect lighting, lighting another under the tunnel to give the appearance of floating sheets of sound-absorbing aluminum and silver – to focus on what is for the client: The most valuable tool throughout the building.