about us
Block722 is an Athens-based architecture studio, founded in 2009 by architect Sotiris Tsergas and interior designer Katja Margaritoglou.
The team combines Greek and Scandinavian heritage, as well as interdisciplinary experience, and creates work that feels confident, natural, and timeless. The studio undertakes a variety of work, from residential to commercial and hospitality, managing in-house all stages of architectural development, from concept design, through to construction and delivery.
Solutions always incorporate a focus on quality materials, a crafts-based approach and collaborations with local artisans and artists that interpret the Mediterranean spirit and traditions for the 21st century.
An architectural ethos that places a sense of balance at its heart is among this boutique, yet dynamic practice’s guiding principles. At the same time, Block722’s design solutions are strongly led by each project’s contextual needs and the client’s brief.
As a result, the studio has won several high-profile awards and has been featured widely in Greek and international media.
Sotiris Tsergas | Architect Engineer, Managing Director & Partner
Katja Margaritoglou | Executive Creative Director & Partner
katja@block722.com
the team
Vasiliki Moustafatzi | Design & Project Director
MArch, National Technical University of Athens, Greece
Michael Gryllakis | Construction Manager
MSc Civil Engineer, National Technical University of Athens,
Greece
Natalie Dillon | Operations Support& BIM Manager
MArch, National Technical University of Athens, Greece
MSc in Conservation of Monuments and Sites,
KU Leuven-Raymond Lemaire,
International Center for Conservation, Leuven, Belgium
Efi Spyrou | Communication & Artistic Director
MFA& BFA, Athens School of Fine Arts, Greece
BSc in Communication, University of Indianapolis, USA
Nikos Vlachos | Financial Accounting Manager
MBA, University of Patras, Greece
MSc Institute of Certified Public Accountants of Greece
Maria Bekakou | Financial & Legal Assistant
Msc, London School of Economics, UK
Patricia Fakiolaki | Design Leader
MArch, University of Patras, Greece
Georgia Nikolopoulou | Senior Architect Engineer & Design Leader
MArch, National Technical University of Athens, Greece
Marilena Michalopoulou | Project Architect
MArch, École Polytechnique, Democritus University of Thrace, Greece
Ersi Mantziara| Senior Architect, PA
MA in Architectural design, UTH
MArch, National Technical University of Athens, Greece
Danai Lazaridi | Senior Interior Designer
MA in Architecture Design, University of Thessaly, Greece
BA in Interior Design, Vacalo Art & Design College,
Athens, Greece
Katerina Mavromoustaki | Interior Designer
BA in Architecture Design, University of Patras, Greece
Athina Papachristou | Architect Engineer
MArch, National Technical University of Athens, Greece
Ioanna Petroulaki | Assistant Civil Engineer
MArch, National Technical University of Athens, Greece
Dimitris Aidonis | Architect
MA in Advanced architecture, IAAC, Barcelona, Spain
MArch, École Polytechnique, Democritus University of Thrace, Greece
Markella Tzachrista | Architect Engineer
MArch, National Technical University of Athens, Greece
MA in Urban and Regional Planning,
National Technical University of Athens, Greece
MTzachrista@block722.com
Elisavet Argyropoulou| Junior Architect
MArch, National Technical University of Athens, Greece
Evangelos Evangelou | Junior Architect
MArch, Department of Architecture, University of Ioannina, Greece
eevangelou@block722.com
Francesca Balfoussia | Design Director
MArch, National Technical University of Athens, Greece
Christina Kontou | Senior Architect Engineer & Project Manager
MArch, National Technical University of Athens, Greece
BA in Interior Architecture, University of West Attica, Greece
Nileta Kotsikou | Interior Design Director & Project Manager
MArch, School of Engineering, University of Patras, Greece
MArch, The Institute for Advanced Architecture of Catalonia, Barcelona, Spain
Nikol Chatzigianni | Administrative Manager
MSc, London Metropolitan University, UK
Natasa Gounari | HR assistant
Diploma, Surgery Nursing - IEK SBIE, Athens, Greece
ngounari@block722.com
Elena Milidaki | Design Leader
MArch, National Technical University of Athens, Greece
Apostolos Karastamatis | Project Architect
MArch, University of Patras, Greece
MA In Interior Design, University of Brighton, UK
Agni Stasinopoulou | Project Architect
BA in Architecture, University of Westminster, UK
MArch, University of Southbank, UK
Eirini Tsakalaki | Project Architect
MArch, National Technical University of Athens, Greece
Sofia Stefanopoulou | Interior Designer
MSc, National Technical University of Athens, Greece
Gregory Bodiotis | Interior Designer
BA in Interior Architecture, AKTO 'Art & Design Collage', Athens, Greece
Yannis Mantzaris | Ιndustrial Designer
BA in Product Design and Innovation, Industrial Design, Middlesex
University, UK & MA in GEO-Design, Design Academy Eindhoven, Netherlands (on going)
Electra Polyzou | Junior Architect
MArch, National Technical University of Athens, Greece
Giorgos Tsilomelekis | Junior Architect
MArch, Aristotle University of Thessaloniki, Greece
Eleni Tsakalou | Accounting Assistant
MSc, Mathematical Finance &Risk Analysis, University of Athens, Greece
Nansy Nikolopoulou | Architect Engineer
MSc Research in Architecture: Architectural Design-Space-Culture στο School of Architecture, NTUA, Greece
Μarianna Tsolia | Intern Architect
BA in Architecture, National Technical University of Athens (in progress), Greece
Tzemil Moustafoglou | Junior Architect
MArch, École Polytechnique, Democritus University of Thrace, Greece
tmoustafoglou@block722.com
recognition
World Luxury Awards, Luxury beachfront hotel & Luxury seaside hotel, Continent winner: Europe, winner* Meraviglia Slow Living
World Architecture Awards 43rd cycle winners 2023, Architecture/Realized category, winner * O Lofos
DOMA Greek Architecture Awards, Best Work, shortlisted *O Lofos
Archdaily Awards 2023, Building of the Year, nominee * O Lofos
ΑHEAD Awards 2022, shortlisted *Casa Cook Samos
World Luxury Hotel Awards 2022, Best Luxury Concept Hotel, winner *Meraviglia Slow Living
Ηotel Design Awards 2022, 196+ Forum, winner *Casa Cook Samos
Greek Hotel of the Year 2022, Gold hideaway hotel & Gold all suite hotel, winner *Meraviglia Slow Living
Architizer A+Firm Awards 2021, Best architecture and design firms Europe, special mention *Block722 studio HQ
Big See Interior Design award 2021, Interior workplace, winner *Block722 studio HQ
Big See Interior Design award 2019, winner *Olea All Suite Hotel
Ahead Awards Europe 2019, Resort category, shortlisted *Olea All Suite Hotel
Design Awards 2018, finalist *Olea All Suite Hotel
Interior Design 6th Annual Best of Year Awards NY 2018, Best large resort, winner *Olea All Suite Hotel
100% Hotel Awards 2018, Best resort, best reception, best restaurant, best room, winner *Olea All Suite Hotel
Architects’ Directory honors the late, great Zaha Hadid, July 2016 Issue of Wallpaper* (W*208) *Sotiris Tsergas, Block722
about us
Block722 is an Athens-based architecture studio, founded in 2009 by architect Sotiris Tsergas and interior designer Katja Margaritoglou.
The team combines Greek and Scandinavian heritage, as well as interdisciplinary experience, and creates work that feels confident, natural, and timeless. The studio undertakes a variety of work, from residential to commercial and hospitality, managing in-house all stages of architectural development, from concept design, through to construction and delivery.
Solutions always incorporate a focus on quality materials, a crafts-based approach and collaborations with local artisans and artists that interpret the Mediterranean spirit and traditions for the 21st century.
An architectural ethos that places a sense of balance at its heart is among this boutique, yet dynamic practice’s guiding principles. At the same time, Block722’s design solutions are strongly led by each project’s contextual needs and the client’s brief.
As a result, the studio has won several high-profile awards and has been featured widely in Greek and international media.
Sotiris Tsergas | Architect Engineer, Managing Director & Partner
Katja Margaritoglou | Executive Creative Director & Partner
katja@block722.com
the team
Vasiliki Moustafatzi | Design & Project Director
MArch, National Technical University of Athens, Greece
Michael Gryllakis | Construction Manager
MSc Civil Engineer, National Technical University of Athens,
Greece
Natalie Dillon | Operations Support& BIM Manager
MArch, National Technical University of Athens, Greece
MSc in Conservation of Monuments and Sites,
KU Leuven-Raymond Lemaire,
International Center for Conservation, Leuven, Belgium
Efi Spyrou | Communication & Artistic Director
MFA& BFA, Athens School of Fine Arts, Greece
BSc in Communication, University of Indianapolis, USA
Nikos Vlachos | Financial Accounting Manager
MBA, University of Patras, Greece
MSc Institute of Certified Public Accountants of Greece
Maria Bekakou | Financial & Legal Assistant
Msc, London School of Economics, UK
Patricia Fakiolaki | Design Leader
MArch, University of Patras, Greece
Georgia Nikolopoulou | Senior Architect Engineer & Design Leader
MArch, National Technical University of Athens, Greece
Marilena Michalopoulou | Project Architect
MArch, École Polytechnique, Democritus University of Thrace, Greece
Ersi Mantziara| Senior Architect, PA
MA in Architectural design, UTH
MArch, National Technical University of Athens, Greece
Danai Lazaridi | Senior Interior Designer
MA in Architecture Design, University of Thessaly, Greece
BA in Interior Design, Vacalo Art & Design College,
Athens, Greece
Katerina Mavromoustaki | Interior Designer
BA in Architecture Design, University of Patras, Greece
Athina Papachristou | Architect Engineer
MArch, National Technical University of Athens, Greece
Ioanna Petroulaki | Assistant Civil Engineer
MArch, National Technical University of Athens, Greece
Dimitris Aidonis | Architect
MA in Advanced architecture, IAAC, Barcelona, Spain
MArch, École Polytechnique, Democritus University of Thrace, Greece
Markella Tzachrista | Architect Engineer
MArch, National Technical University of Athens, Greece
MA in Urban and Regional Planning,
National Technical University of Athens, Greece
MTzachrista@block722.com
Elisavet Argyropoulou| Junior Architect
MArch, National Technical University of Athens, Greece
Evangelos Evangelou | Junior Architect
MArch, Department of Architecture, University of Ioannina, Greece
eevangelou@block722.com
Francesca Balfoussia | Design Director
MArch, National Technical University of Athens, Greece
Christina Kontou | Senior Architect Engineer & Project Manager
MArch, National Technical University of Athens, Greece
BA in Interior Architecture, University of West Attica, Greece
Nileta Kotsikou | Interior Design Director & Project Manager
MArch, School of Engineering, University of Patras, Greece
MArch, The Institute for Advanced Architecture of Catalonia, Barcelona, Spain
Nikol Chatzigianni | Administrative Manager
MSc, London Metropolitan University, UK
Natasa Gounari | HR assistant
Diploma, Surgery Nursing - IEK SBIE, Athens, Greece
ngounari@block722.com
Elena Milidaki | Design Leader
MArch, National Technical University of Athens, Greece
Apostolos Karastamatis | Project Architect
MArch, University of Patras, Greece
MA In Interior Design, University of Brighton, UK
Agni Stasinopoulou | Project Architect
BA in Architecture, University of Westminster, UK
MArch, University of Southbank, UK
Eirini Tsakalaki | Project Architect
MArch, National Technical University of Athens, Greece
Sofia Stefanopoulou | Interior Designer
MSc, National Technical University of Athens, Greece
Gregory Bodiotis | Interior Designer
BA in Interior Architecture, AKTO 'Art & Design Collage', Athens, Greece
Yannis Mantzaris | Ιndustrial Designer
BA in Product Design and Innovation, Industrial Design, Middlesex
University, UK & MA in GEO-Design, Design Academy Eindhoven, Netherlands (on going)
Electra Polyzou | Junior Architect
MArch, National Technical University of Athens, Greece
Giorgos Tsilomelekis | Junior Architect
MArch, Aristotle University of Thessaloniki, Greece
Eleni Tsakalou | Accounting Assistant
MSc, Mathematical Finance &Risk Analysis, University of Athens, Greece
Nansy Nikolopoulou | Architect Engineer
MSc Research in Architecture: Architectural Design-Space-Culture στο School of Architecture, NTUA, Greece
Μarianna Tsolia | Intern Architect
BA in Architecture, National Technical University of Athens (in progress), Greece
Tzemil Moustafoglou | Junior Architect
MArch, École Polytechnique, Democritus University of Thrace, Greece
tmoustafoglou@block722.com
recognition
World Luxury Awards, Luxury beachfront hotel & Luxury seaside hotel, Continent winner: Europe, winner* Meraviglia Slow Living
World Architecture Awards 43rd cycle winners 2023, Architecture/Realized category, winner * O Lofos
DOMA Greek Architecture Awards, Best Work, shortlisted *O Lofos
Archdaily Awards 2023, Building of the Year, nominee * O Lofos
ΑHEAD Awards 2022, shortlisted *Casa Cook Samos
World Luxury Hotel Awards 2022, Best Luxury Concept Hotel, winner *Meraviglia Slow Living
Ηotel Design Awards 2022, 196+ Forum, winner *Casa Cook Samos
Greek Hotel of the Year 2022, Gold hideaway hotel & Gold all suite hotel, winner *Meraviglia Slow Living
Architizer A+Firm Awards 2021, Best architecture and design firms Europe, special mention *Block722 studio HQ
Big See Interior Design award 2021, Interior workplace, winner *Block722 studio HQ
Big See Interior Design award 2019, winner *Olea All Suite Hotel
Ahead Awards Europe 2019, Resort category, shortlisted *Olea All Suite Hotel
Design Awards 2018, finalist *Olea All Suite Hotel
Interior Design 6th Annual Best of Year Awards NY 2018, Best large resort, winner *Olea All Suite Hotel
100% Hotel Awards 2018, Best resort, best reception, best restaurant, best room, winner *Olea All Suite Hotel
Architects’ Directory honors the late, great Zaha Hadid, July 2016 Issue of Wallpaper* (W*208) *Sotiris Tsergas, Block722