Driven by intuition, experimentation, and a deep enjoyment in the practice of architecture, we find pleasure in the making through digital technology and an evolving exchange of design and manufacturing methodologies. Whilst recognizing architecture’s capacity to offer solutions to our living environment, and pose questions about cultures and societies, we are particularly drawn to how ideas are made and the conditions to which this produces knowledge and inventive architecture. Operating as a design + fabrication studio and architectural research collective, felt is founded by our collective experiences stemming from the intersecting disciplines of design, fabrication, and digital technologies. This website serves as a conduit to our on-going investigations, projects and as a catalogue of built works.


Stefan Lengen BSc(Hons) DipArch ARB RIBA Swiss Reg

Stefan is a registered Architect in the UK as well as in Switzerland and a member of the Royal Institute of British Architects, Architects Registry Board and the Institute for Swiss Architect with extensive experience as an architect from both independent work and collaborations on residential, commercial, and institutional projects across all phases. He has led various teams on projects ranging from education to social housing including the new Wood Lane Station in London and the New Law Faculty in Vienna. Stefan has a deep understanding of the fundamentals of design for manufacture and works with a hands-on approach from concept to completion. In 2012 Stefan founded FELT architecture, design and research Ltd. His work has been widely published and received national and international awards.

Stefan graduated at the University of Applied Sciences for Architecture, Wood and Civil Engineering, Berne, Switzerland in 1993. He was awarded a scholarship to study architecture at the Bartlett School of Architecture University College London under the leadership of Professor Peter Cook and graduated in 2001. His taught students have received numerous UCL and national awards. Stefan combines practice with academia and taught in various European universities and was promoted to Associate Professor in Architecture at the Bartlett School of Architecture, UCL in 2022.

Download CV.

Isac Leung BA(Hons) MArch

Isac Leung is an architectural designer, maker, tutor, and experimental sound artist.

Trained as an architect in Brighton and the Bartlett, UCL-

Isac finds their voice and joy in a broader scope of traversing experiences through practicing as a designer & fabricator and consultant / project manager in architectural practices, principal contractor offices, specialist fabrication workshops, and artist studios:

During which they have led, collaborated, procured, translated, and delivered a body of design & built works ranging from the public domain, private commission, and research projects in various scales and situations.

In 2022, Isac founded VAL (Vessels at Large). Situated in between the disciplines of spatial, sculptural, and sonic, VAL is a parallel operation that is underpinned by an understanding in design for manufacturing, with a fascination embody spatio-sonic research and experimental fabrication.

Mert Ozbolat BA(Hons)

Mert Ozbolat studied architecture in Istanbul and Brighton. He is currently working as freelance architectural designer in London. His experience spans from jewel crafting, interior design, and architecture.

Since 2019, he is working on EMBD Community Initiative research with Stefan Lengen. This design research explores strategies to reactivate the productive landscapes and dormant building structures to reverse the trend of abandonment by facilitating a circular economy within the common(s) network in collaboration with local communities, trade, stakeholders, and the planning authorities. Research aims to create a method of work which explores participatory design principles, advocating collaborative work, local material sourcing and innovative construction methodologies that address whole-life approach.

In 2022, research is published in Lisbon Architecture Triennale 2022 - Terra under the title of ‘’A community-led research initiative for a productive landscape’’ in ‘’Emerging voices on new architectural ecologies’’ book. In 2023, Productive Landscapes pilot project has won best small scale conceptual project award in SARCH Berlin 2023.

Nowadays, he is working on his personal furniture projects. Lately, he is working alongside Cloudyworks with the Lidar technology.

 London, UK
felt architecture, design & research ©