Iacopo Sassi, Director

Iacopo has worked both nationally and internationally on a variety of projects with a focus on luxury residential refurbishments, extensions and new build projects in the Greater London area. 

With more than a decade of experience he has worked with offices that implement a high standard of design such as Foster+PartnersStanton Williams and Barbara Weiss Architects. Working with mostly small to medium sized projects he gained an interest into architectural details that he considers essential for the success of a project. He believes that the quality of a project can be measured in terms of space, materiality and light.

Originally from Italy, Iacopo is a third generation designer who has always been interested in history, art and architecture. Iacopo is a member of both the ARB and RIBA. He currently resides in Hampton and serves as Deputy Chair and a Planning Advisor for The Hampton Society.

Photography by Paolo Bernardotti


Leonidas Tsichritzis, Part 3 Architect

Leonidas received his MSc in Sustainable Environmental Design from the Architectural Association School of Architecture in London. He previously studied in Greece at the University of Thessaly where he earned his Diploma of Architecture.

During his career Leonidas has been involved in projects at many different scales and has developed a strong interest in environmental design, sustainability as well as the energy in the built environment.  

Aside from his contribution to Square One Architects, Leonidas is also currently studying for a PhD in Environmental Design and working as a teaching assistant at the Kent School of Architecture.



Britt joined Square One in 2019 whilst undertaking the second year of her Part II Masters Qualification at Kingston University. Prior to this, Britt graduated from Bournemouth University with her first degree in Architecture and stayed in Dorset to work professionally with a local practice for 3 years; she is experienced in RIBA stages 0-4 on a wide range of projects types and scales.

She is presently undertaking the final year of her MArch Part II qualification at Kingston School of Art. She was nominated for the RIBA President’s Medal 2018 as part of her unit in her first year for the “Surbiton Yatai” project; a live build project designed in collaboration with the Community Brain. Her work was also exhibited in summer 2018 at the Victoria & Albert Museum as part of their exhibition which focused on allotment culture and community identity.

Britt works for us at Square One Architects part time alongside her studies. She works mainly on private residential projects. 


Past collaborators include: Jeremy Emerson and Stephanie Moore