LASSA is an international architecture practice founded in 2009 by Theo Sarantoglou Lalis and Dora Sweijd with offices in London and Brussels. LASSA operates at the intersection between the fields of art, technology and social science.
As a Practice, we prioritise the behavioral attributes of architectural form – its capacity to enact and affect participation, stimulate the corporal experience of space and enhance socialization and the collective.

As a practice, we are strongly engaged with technology for its pivotal role in the way we collaborate, design and fabricate architecture. Current work includes commissions from the public and private sectors in Europe, the Middle East and Asia. With over 15 years of experience in delivering international projects, our team has developed expertise in the field of digital design and manufacturing, which enables us to conceive projects of great sophistication with a particular control over the manufacturing process and cost globally. Our London studio, benefits from our experience in collaborating with an international network of specialists, providing our projects with the accumulated knowledge and expertise at every scale.

Our Brussels studio allows us to test our ideas in real scale through prototyping and 1 to 1 fabrication.  For our larger commissions, we use our facilities to develop building parts such as facade components, room size interior mock-ups and furniture.

LASSA is concurrently engaged in academic research through the work of Latent Territories (AA dip17), at the Architecture Association and through workshops and lectures worldwide. Besides teaching at the AA, LASSA’ s team have held teaching positions at universities such as Harvard, Columbia, the Bartlett, Westminster University, Lund University and Gothenborg University.

In 2010, LASSA was awarded a REA European research grant for COELUX, an advanced lighting system, in partnership with world leading specialists as well as research institutions throughout Europe and Switzerland. LASSA was shortlisted for a number of awards including the 2012 Chernikov award and the 2013 Lisbon Biennale award. LASSA (Sarantoglou Lalis & Sweijd Architects ltd) is a chartered architecture company with the Architects Registration Board (ARB) in London.





Theo Sarantoglou Lalis     I     Founding Principal     I     ARB, London.

Theo Sarantoglou Lalis is a French and Greek architect. He has been a Unit master for Diploma unit 17 at the Architectural Association since 2009. He is a visiting a professor at Chalmers University in Sweden. He has run architecture and urban design workshops in Rio, Nanjing, Teheran, Lund and Melbourne. He has taught undergraduate studios in Lund and postgraduate studios at Harvard G.S.D and at Columbia in NY. Prior to founding LASSA, he worked for 12 years as a project architect then project director on a number of completed international projects. He received his masters from the Bartlett school of Architecture in London. He has experience practicing architecture in 18 countries and is a registered architect since 2004.


Dora Sweijd     I    Founding Principal    I     Architects Board, Brussels.

Dora Sweijd received her masters from the Bartlett in London. She currently teaches at the Architectural Association in London and is a visiting professor at Chalmers University in Sweden. She has run architecture and urban design workshops in Rio, Nanjing, Antwerp and Lund. She was a visiting professor at Lund University. Prior to founding LASSA, she worked as an architect in practices in Brussels, London and New York including REX NY and Fosters and Partners.







Jonathan Cheng I AA School, London.

Philip Doumler I AA School, London.

Marc Martinez Marti   I   ENTSAP, Madrid.

Stanislas Gimel I ESA, Paris.

Kasper Ax     I    Bartlett School of Architecture, London.

Cyrus Ardalan   I   ESA, Paris.

Yu Zheng   I   AA School, London.

Yousef Al-Mehdari   I   Bartlett School of Architecture, London.

Luke Tan   I   AA School, London.

Ole Wolthers   I   AA School, London.

Greg Spaw   I   Harvard GSD, Cambridge.

Keehyun Ahn  I   UC Berkley, San Francisco.

Lee Su Huang   I   Harvard GSD, Cambridge.

Andy Bryant   I   UCLA, Los Angeles.

Sebastian Andia   I   AADRL, London.

Perrine Planche    I   AA School, London.

Doyeon Cho    I   AA School, London.

Valeria Garcia   I   AA School, London.

Theo Grousopoulos   I   IAAC, Barcelona.

Perrine Planche    I   AA School, London.

Thomas Jensen   I   AA School, London.

Rodrigo Chain  I   AADRL, London.

Luis Sacristain   I   ENTSAP, Madrid.

Luc Isri   I   ESA, Paris.

Beatrice Campos   I   ESA, Paris.

Nikos Klimentidis   I   AA School, London.