BURR is an experimental architecture practice led by Elena Fuertes, Ramón Martínez, Álvaro Molins, and Jorge Sobejano. Their name, BURR, refers to imperfections or remnants produced during material transformation, reflecting their interest in conditions often excluded from aesthetic or functional norms. Their work is experimental and seeks to expand the range of spatial experiences, techniques, materials, and spatial-use models. BURR has received distinctions including the XVI Spanish Urbanism and Architecture Biennale Award (BEAU XVI), 2025 Next 30 Design Awards, and FAD (finalist), and COAM (honorable mention). They have lectured at institutions such as GSAPP, RISD, Université Laval, HEAD Genève, RIXC, and CA2M. Their work has been featured in Domus, Detail, Frame, AV, Dwell, and Archpaper. BURR also runs Espacio Gaviota, an exhibition space in Madrid supporting independent cultural initiatives.