About us
We are a cooperative that puts reuse into action.
We work to make reuse common practice in architecture. We connect research and practice to question how we build and to develop viable solutions through design, technology and economics, while also tackling regulatory barriers.
Based in El Prat de Llobregat, we work with those who design, build and manage. We share what we learn so that every experience widens the possibilities for reuse.
Team

Sara Baldasano
Architecture and reuse
Architect (ETSAB) and PhD candidate at UPC, in the Architecture, Energy and Environment programme, where she researches the regulatory and operational gaps in material reuse. More than fifteen years of practice in architecture and renovation as founding partner of Septiembre Arquitectura in Barcelona. She teaches at Elisava and ETSAV, is a member of AUS (COAC) and speaks at conferences on circular construction and reuse.
“Reuse can no longer be the exception.”

Albert Cols
Architecture and sustainability
Architect (ETSAB, UPC), with an exchange at the Illinois Institute of Technology in Chicago, committed to sustainable architecture and exploring new ways of integrating sustainability into the urban and social fabric of cities. More than ten years of practice at international offices in Rotterdam, Berlin and Chicago, including GRAFT Architekten, and founder of Denzel Studio, a sustainable architecture studio in Barcelona.
“The most sustainable city is the one that makes use of what it already has.”

Ignasi Cubiña
Circular industrial economy
Biologist and entrepreneur. He describes himself as an orchestrator in the circular industrial economy (CIE): he connects actors, sectors and value chains to drive disruptive innovation and new business models. In 2005 he co-founded Eco Intelligent Growth (EIG, Construcía Group) to apply Cradle to Cradle® and the circular economy. He has spoken at TED, Resource London, Smart City Expo and Wastebuild Amsterdam, and teaches on master’s programmes such as the UPC Chair in Circular Economy.
“Circular construction will be social or it will not be at all.”
Former members of LOOP
Thaïs Kempell · Luca Caraglio
Networks
AUS · Arquitectura i Sostenibilitat (COAC) ↗ · Sara Baldasano, member
Construction Goes Circular ↗ · members
Recognition
Premios Juana Millán 2026 ↗ · first runner-up, Juana Naciente category
We work with
AMB ↗ · Barcelona Metropolitan Area
ARC ↗ · Catalan Waste Agency
BIMSA ↗ · Barcelona d’Infraestructures Municipals
Develop ↗ · Sustainability projects and certification
EIG ↗ · Eco Intelligent Growth
Fundació BIT Habitat ↗ · Barcelona City Council
ITeC ↗ · Institut de Tecnologia de la Construcció de Catalunya
UPC ↗ · Universitat Politècnica de Catalunya
Want to join in? Let’s talk.
