About

“The design of each project stems from a thorough conceptual investigation. Simple geometric volumes, clean lines, top quality materials and small details work together to create a unified space that carries a powerful yet humble sensation; a sensation that defines each project and has come to be the signature of the firm.”

Block722architects+ is an Athens and Stockholm based architecture practice. It was founded in 2009 by Sotiris Tsergas, Katja Margaritoglou and Konstantinos Korfiatis.

Block722 works in the architectural field, fully encompassing the interior design and construction fields through Block722architects+, managing a wide variety of projects from the planning state throughout completion. The practice’s expertise in the complete project management of residential, retail and business projects is showcased in the portfolio. The office’s individual and collective experience ensures the collaboration with competent and specialized suppliers and craftsmen, guaranteeing the meticulous and accurate realization of the architectural concept. A close relationship with the client is of the utmost importance to the practice, in order to ensure a prosperous collaboration and the best possible final result.

Block722 was founded in the heart of Athens, on Patission 57, one of the most densely populated areas of the capital. The intense cultural and ethnic diversity of the area have enhanced the practice’s relation to the city’s reality and constant adaptation to new and interesting design elements. The office’s location, urban block 722, becomes more than a city planning number – it evolves into an element of identity.


Sotiris Tsergas
Co-Founder, Architect Engineer NTUA

Katja Margaritoglou
Co-Founder, Interior Designer

Konstantinos Korfiatis
Co-Founder, Civil Engineer

Vasiliki Moustafatzi
Project Manager, Architect Engineer NTUA

Francesca Balfoussia
Project Manager, Architect Engineer NTUA

Demetris Evangelou
Architect Engineer NTUA

Patricia Fakiolaki
Architect Engineer

Elena Milidaki
Architect Engineer NTUA

Sotiris Tsergas

Sotiris has been practicing architecture for more than 15 years. His body of work includes a big variety of high-end private projects, residences, hotels, offices and retail stores. He graduated from the National Technical University of Athens in 2000. In 2003 he became project manager of the Olympic hockey stadium in Athens. In 2005 he created his own architecture office and in 2009 he co-founded Block722 architects along with Katja and Konstantinos.

Katja Margaritoglou

Katja graduated in 2003 from the Vakalo College of Art and Design in Athens. In 2004 she started her own studio, taking on both small and large scale projects. In 2009 she co-founded Block722 architects, along with Sotiris and Konstantinos. Today Katja’s main focus is to develop and direct the design concept that has become the trademark of Block722 architects.

Konstantinos Korfiatis

Konstantinos graduated from NTUA in 1994 and obtained an MSc in hotel management from the University of Surrey in 1997. In 1998 he began working as an engineer in private projects. Since then, his portfolio showcases construction experience in private residences, hotels, offices and retail stores. In 2009 he co-founded Block722architects along with Sotiris and Katja. Konstantinos is working individually but with a close cooperation with the firm as construction manager.

Vasiliki Moustafatzi

Vasiliki graduated from NTUA School of Architecture in 2013 and her diploma thesis won the Environmental Awareness Award “Ecopolis 2014”. She continued with interior design, visual merchandising and energy inspection and participated in various architectural competitions. In 2014 she joined Block722 architects and became a vital force of the team. Vasiliki is managing large scale projects with an all-embracing approach without ever compromising the aesthetics.

Francesca Balfoussia

Francesca graduated from NTUA in 2013 and her work portfolio focuses on interior and industrial design projects. She has participated in various design exhibitions and architecture competitions and has specialised in lighting and industrial design. In 2015 Francesca joined the Block722 architects team and takes on large scale projects with a creative mindset and responsiveness.

Demetris Evangelou

Demetris graduated from NTUA in 2014 and is specialised in fields such as Frei Otto’s experiments, procedural methods and lightweight tensile membrane structures. Demetris joined Block722 architects in 2017. Thanks to his technically solution-driven mind Demetris easily carries the role as an architect with the one as construction supervisor.


Patricia Fakiolaki

Patricia graduated in 2015 from University of Patras. Since then she has participated in various architectural projects focusing on landscape architecture. Additionally Patricia has developed her skills in photography and her eye for composition has been a great asset in her projects. Patricia joined the Block722 architects team in 2017.

Elena Milidaki

Elena graduated from NTUA School of Architecture in 2014 and joined the Block722 architects team in 2017. Her specialisation is in restoration and conservation of traditional buildings along with the design of natural landscape. She has worked with both architectural and interior design projects and she has a great knowledge on legal matters like building permits. Elena’s broad field of expertise gives her a holistic thinking that informs her projects.

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