Transforming Castellana 66
Sustainable, high-performance future for an ageing office complex
GBA: Places | Country: Spain
In Madrid’s bustling business district, the seven-story complex at Castellana 66 was no longer meeting the needs of its owners and tenants as it aged – with energy and carbon inefficiencies stemming from subpar windows and inadequate thermal insulation. Rather than demolish and rebuild, we worked with the client to sustainably upgrade and future-proof the existing structure.
Arcadis proposed a renovation of the complex based on bioclimatic principles to improve noise protection, energy efficiency, and thermal insulation. By integrating photovoltaics (PV) and high-performance materials, the design minimized additional embodied carbon while enhancing daylight, comfort, and wellness for occupants. This careful redesign retained the existing structure, negating the carbon impact of demolition and reconstruction. As a result, an estimated 10,800t of CO2e will be avoided. On-site energy generation will be higher than consumption, paving the way towards future climate neutrality.
Castellana 66 is now one of the most energy-efficient buildings in Europe. This project showcases our commitment to innovative solutions that reimagine existing buildings in inventive and sustainable ways.
Pablo La Roche, Director - Sustainable Design Services, Arcadis
