t-sa is an architectural atelier focused on producing work of enduring tactile quality. Its methodology deeply engages with each character of the specific context and materiality of each project. Context meaning the existing built fabric, its details, city, landscape as well as the stories and the narratives of the client and the inhabitants. Social, cultural, economical and political aspects of the background context also play important roles regardless of the scale of the project. t-sa believes in working with what already exists on site in the most economical means, delivering enriched and renewed built-life to each project. The notion of renewal is researched and investigated within the practice and through teaching at t-sa forum, our own independently run research school. Through materials and each specific context, t-sa has an interest in emotional qualities in the textures and tactility as well as connecting to the past and the future for each project environment.
From refurbishment of small spaces to new build projects, t-sa seeks for the core essence of each architectural challenge for our clients and aims to create timeless architecture with clarity and sensitive subtleties. It is helping to construct the future heritage of our built environment and landscapes.

t-sa was set up in 1996, founded by Yuli Toh and Takero Shimazaki. Formerly known as Toh Shimazaki Architecture, it works as a team discipline, often collaborating with designers, researchers and photographers on projects.

The Team and Collaborators

Takero Shimazaki — Director

Takero graduated from the University of Wales, Cardiff and The Bartlett School of Architecture, London. Having previously worked for Itsuko Hasegawa Atelier, Richard Rogers Partnership and Alison and Peter Smithson, he co-founded t-sa with Yuli Toh in 1996. He taught at the Architectural Association between 2010 and 2015 and is an external examiner at Cambridge and Cardiff. He currently runs Diploma Unit 8 at The Cass, London Metropolitan University.





Jennifer Frewen — BArch (hons) ARB, Associate Director

Jennifer having graduated from Dublin Institute of Technology, worked for an architecture and masterplanning practice in Dublin. She has been an integral part of t-sa since participating in t-sa’s research workshop, t-sa forum following her degree. She is involved with guiding the direction and delivery of t-sa’s ongoing works, bringing a strong aesthetic, precision and detail to each project. She has become a lead designer in the team and a credit in the development of the practice.


Cécile David — DiplArch ARB, Associate

Cécile graduated from École d’Architecture in Marne-la-Vallée, France before moving to the UK in 2011. She completed her professional qualifications at the University of Westminster.  Prior to joining t-sa in 2018 she worked in several practices in Switzerland and London, where she worked on the delivery of several projects, ranging from residential extensions, retail refurbishment and a large student halls of residence in Cambridge. She is currently leading the development and delivery of cultural, commercial and heritage projects, focusing on their materiality and detailed expression.


Paolo Emilio Pisano — BArch AADipl ARB, Associate

Paolo studied at Univeristà degli Studi di Cagliari and Architectural Association before joining t-sa. He has been awarded a RIBA President’s Medal Commendation for his work at the AA and the first prize in the Zagreb Society of Architect’s competition Think Public Space.

Joshua King — BA (hons) DipArch ARB, Senior Architect

Joshua graduated from the University of Manchester before completing his diploma at the Cass School of Architecture. Prior to joining t-sa he worked on a number of residential developments, office buildings and educational facilities across the UK. Joshua continues to consider material culture within architectural design through his on-going contribution to projects within the office.


Daniel Hayes — BSc MArch PGDip ARB

Daniel completed his BSc, MArch, and PGDip at the Welsh School of Architecture, Cardiff University. Before joining t-sa, Daniel contributed to a variety of significant cultural, public, and residential projects, gaining expertise in concept design, technical delivery, and low-carbon design. At t-sa, Daniel continues to explore his interest in an architectural material language that is tactile, evocative, and bio-based.


Neringa Aliksandraviciute — BA (hons) MArch

Neringa completed her Bachelor and Diploma studies at the Cass School of Architecture. Prior to that, she studied at the College of Design in Vilnius. Before joining t-sa, Neringa worked on commercial, mix-used developments, small scale public buildings and residential projects.


Oli Brenner — BA (Cantab) MArch

Oli completed his diploma at the School of Architecture & Design, London Metropolitan University where he was awarded the prize for best overall portfolio. Prior to that, he studied at the Accademia di Architettura in Mendrisio, Switzerland and the University of Cambridge, where he received the RIBA East Award and was nominated for the RIBA Bronze President’s Medal. Before joining t-sa, Oli worked for practices in both London and Antwerp on a range of public and private projects. His particular interest lies in architecture of re-use and the design of interventions which respond to both sensitive and complex urban conditions.


Joshua Bristow — MA (Cantab) MArch

Joshua graduated from the University of Cambridge before completing a postgraduate scholarship at the Royal Drawing School and his masters at the London Metropolitan University. He has specialised experience working on the delivery of projects in listed and historically sensitive contexts. Alongside practice he maintains a practice of drawing and printmaking which informs his design approach.


Lily Markey — BA (hons) MArch

Lily studied at the University of Sheffield before gaining her Diploma from London Metropolitan University where she chaired the Architectural Society. Before joining t-sa Lily worked for practices in London on a range of projects including social and affordable housing schemes as well as public and private cultural projects in urban conditions. Her professional work has also cultivated an enduring interest and experience in Architectural Communications. Lily continues to explore the potential of re-use to provide generous architecture in her contribution to projects in the UK and internationally.


Oliver Reynolds — BA (hons) MArch

Oli studied at Kingston School of Art and completed his diploma at London Metropolitan University where he received a commendation for the RIBA Presidents Silver Medal Award for his student work. Before joining t-sa, Oli worked on a range of projects of different scales, including commercial, residential, and mixed-used schemes in both urban and rural environments.


Jonathan Mortlock — MA (Cantab) MArch

Jonathan graduated from the University of Cambridge before completing his master’s degree at London Metropolitan University, where his work received the RIBA London Postgraduate Award for Best Architectural Detail, Best History and Theory Essay Prize and a nomination for the AJ Student Prize. Prior to joining t-sa, Jonathan worked on a range of public and private schemes in rural Wales, including national cultural institution projects.


Steve Harley — BA (hons) MArch

Steve completed his diploma at the School of Art, Architecture and Design at London Metropolitan University. Prior to joining t-sa he undertook 2 years practical, on-site experience working for a masonry subcontractor in the South East, participating in the manufacturing and construction phase of building design at a variety of scales across multiple residential projects.


Samuel Walton — BA (hons) MPhil

Sam completed his master’s degree at the University of Cambridge where his project received the Postgraduate Prize and a nomination for the AJ Student Prize. Prior to that, he studied at Sheffield Hallam University where he was nominated for the RIBA Bronze President’s Medal. Before joining t-sa, Sam worked for a practice in Lincolnshire on a number of new and historic, public and residential projects with an emphasis on sensitivity and sustainability.

Anton Gorlenko — Collaborative Photographer

Anton completed a Masters Degree on the history of European Neoclassical architecture at Moscow State University. He has worked as an art critic for various magazines and in 2008 launched 1064 ° Goldsmiths Guild, a creative agency working on book design, installations, films and jewellery. Since moving to London in 2012 he studied architecture at the Architectural Association and is currently working as a freelance architectural designer, collaborating with Strelka Institute. 

Fern Murphy — Bookkeeper

Doll Knowles — Hospitality

Past team and collaborators

Yuli Toh


John Ahern, Tomoyo Arimoto, Louisa Barfoot, Jason Bechtle, Simon Davison, Emmanuel Dupont, Angie Foong, Jon Errazti De Miguel, Tom Gibson, David Giera, Tanya Goknel, Isabell Gonzaga, Egon Hansen, Emily Harland, Aki Hiraoka, Takehiko Iseki, Yeewan Iu, Risa Iwashita, James Kitson, Stefan Kogler, Ricky Kwok, James Lloyd-Mostyn, Charlie Luxton, Kate Luxton, Anna Mansfield, Monika Marinova, Alasdair Mckenzie, Rosie McLaren, Craig Mitchell, Carin Nakanishi, Haruka Nogami, Antonio Otero, Ian Parlane, Giacomo Pelizzari, Edward Pepper, Colin Priest, Ben Rogers, Keyura Alva Samson, Mami Sayo, Wee-Liam Seow, Meiri Shinohara, Sarah Smith, Erika Suzuki, Kenji Suzuki, Take Suzuki, Kirsty Taylor, Anna Maria Trauttmansdorff, Karabo Turner, Franziska Wagner, Yu Hsiang Wang, Yoko Watanabe, Christine White, Ceri Williams.



Valerie Bennett

Hélène Binet

Richard Brine

Anton Gorlenko

Katsuhisa Kida

Felix Koch

Franck Robert

Edmund Sumner

Graphic Designer and Screen print artists

James McCarthy

Luma Studio – Lucie Murtagh and Mark Stonehouse

t-sa forum architecture school

t-sa is actively involved in education. t-sa forum, an independent school run by the practice was set up in 2006 and is now running annual workshops. t-sa forum aims to bridge the gap between academia and practice, teaching students to test creative working methods in professional environments. t-sa forum is a research wing to t-sa and has been investigating the idea of renewal in our built environment, focusing on ‘refurbishment’ as a theme in buildings in the UK. Takero Shimazaki taught at Architectural Association (2010-2015) and is currently an external examiner at Cardiff and Cambridge.