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
Steef Teeuwen | Operations Director
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
Galanos Katomeris | Senior Architect
BA in Architecture RIBA part I, University of Kent at Canterbury, UK
Graduate Diploma in Architecture RIBA part II, University of Kent at Canterbury, UK
Athina Papachristou | Architect Engineer
MArch, National Technical University of Athens, Greece
Eirini Tsakalaki | Senior Architect Engineer, Project Architect
MArch, National Technical University of Athens, Greece
eirinit@block722.com
Ioanna Petroulaki | Architect Engineer
MArch, National Technical University of Athens, Greece
Dimitris Aidonis | Senior Architect Engineer
MArch, Democritus University of Thrace, Greece
MA in Advanced architecture, IAAC, Barcelona, Spain
daidonis@block722.com
Aigli Lagodimou | Senior Architect Engineer
MArch, National Technical University of Athens, Greece
alagodimou@block722.com
Anastasia Dalma | Senior Architect
BA (Hons) Architecture (RIBA Part I), University of Kent, UK
Master of Architecture in Architecture (RIBA Part II), University of Kent, UK
adalma@block722.com
Foteini Chapsa | Senior Architect Engineer
MArch, National Technical University of Athens, Greece
Eleni Boni| Senior Architect Engineer
MArch, Department of Architecture Master Degree in Architecture and
Urban Design & Studies, University of Thessaly, 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
Nikos Antonoulis | Architect Engineer
Civil Engineering and Surveying Engineering and
Geoinformatics Department (in progress)
BSc Hons Architectural Studies, Strathclyde University (in progress), UK
Dimitra Stergiou | Architect Engineer
MArch, École Polytechnique,
Democritus University of Thrace, Greece
Nikos Klironomos | Architect Engineer
MArch, École Polytechnique,
Democritus University of Thrace, Greece
Elina Varouxaki | Architect Engineer
MArch, National Technical University of Athens, Greece
Anna Papageorgiou | Interior Architect
Interior Architecture, Decorative arts & object design,
West Attica University
Msc Interior Architecture: Adaptive reuse, Hasselt University
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 | Studio Manager
MSc, London Metropolitan University, UK
Natasa Gounari | HR assistant
Diploma, Surgery Nursing - IEK SBIE, Athens, Greece
ngounari@block722.com
Christina Dimitropoulou | Administrative assistant
School of Philosophy, University of Athens (in progress ), Greece
Eleni Tsakalou | Accounting Assistant
MSc, Mathematical Finance &Risk Analysis, University of Athens, Greece
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
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)
Xenia Bouranta | Architect Engineer, Interior Architect
MArch, National Technical University of Athens, Greece
xbouranta@block722.com
Dimitris Papageorgiou | Senior Architect Engineer
MArch, National Technical University of Athens, Greece
Graphic & Branding Design Certification, CalArts, California Institute of the Arts, US
Electra Polyzou | Architect Engineer
MArch, National Technical University of Athens, Greece
electra@block722.com
Kostis Vatanidis | Architect
BSc, University of East London, London, UK
MSc, TU Delft, Delft, the Netherlands
kvatanidis@block722.com
Despoina Kolovou | Architect Engineer
MArch, University of Patras, Greece
MSc, Lighting design, Hellenic Open University, Greece (in progress)
dkolovou@block722.com
Iasonas Diavatis | IT Assistant
MEng, Chemical Engineering, National Technical University of Athens, Greece
MSc, Computer Science, Athens University of Economics and Business, Greece
idiavatis@block722.com
Nansy Nikolopoulou | Architect Engineer
MSc Research in Architecture: Architectural Design-Space-Culture στο School of Architecture, NTUA, Greece
Giorgos Tsilomelekis | Junior Architect
MArch, Aristotle University of Thessaloniki, Greece
Tzemil Moustafoglou | Architect Engineer
MArch, École Polytechnique, Democritus University of Thrace, Greece
tmoustafoglou@block722.com
Evangelos Evangelou | Junior Architect
MArch, Department of Architecture, University of Ioannina, Greece
eevangelou@block722.com
Vasilina Tzouma | Junior Interior Architect
Interior Architecture, Decorative arts & object design, West Attica University
Konstantina Chronopoulou | Junior Architect
BSc in Architectural Studies, Cardiff University
MArch of Architecture, Cardiff University
Maria Xatzikallia | Junior Architect Engineer
MArch, École Polytechnique, Democritus University of Thrace, Greece
Anita Peslis | Junior Architect Engineer
MArch, Department of Architecture, University of Ioannina, Greece
Panagiotis Konstantopoulos | Junior Civil Engineer
MEng, Civil Engineering, National Technical University of Athens, Greece
pkonstantopoulos@block722.com
Elisavet Argyropoulou| Junior Architect
MArch, National Technical University of Athens, Greece
Elena Calapis
Cleaning Ambassador
recognition
IADA 2024, International Architecture & Design Awards, Architecture &Design Community, Personalized Home Creation, Platinum Winner *Viglostasi
IDA, International Design Awards, Residential Interior Design / Houses - Single/Family Dwelling, Gold winner Interior design award *O Lofos
Architecture MasterPrize 2023, Residential project, winner *O Lofos
Muse Hotel Awards, Resort - World-Class Adult Beach Resort, winners 2023 *Casa Cook Samos
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
The Plan Award 2023, shortlisted *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
Steef Teeuwen | Operations Director
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
Galanos Katomeris | Senior Architect
BA in Architecture RIBA part I, University of Kent at Canterbury, UK
Graduate Diploma in Architecture RIBA part II, University of Kent at Canterbury, UK
Athina Papachristou | Architect Engineer
MArch, National Technical University of Athens, Greece
Eirini Tsakalaki | Senior Architect Engineer, Project Architect
MArch, National Technical University of Athens, Greece
eirinit@block722.com
Ioanna Petroulaki | Architect Engineer
MArch, National Technical University of Athens, Greece
Dimitris Aidonis | Senior Architect Engineer
MArch, Democritus University of Thrace, Greece
MA in Advanced architecture, IAAC, Barcelona, Spain
daidonis@block722.com
Aigli Lagodimou | Senior Architect Engineer
MArch, National Technical University of Athens, Greece
alagodimou@block722.com
Anastasia Dalma | Senior Architect
BA (Hons) Architecture (RIBA Part I), University of Kent, UK
Master of Architecture in Architecture (RIBA Part II), University of Kent, UK
adalma@block722.com
Foteini Chapsa | Senior Architect Engineer
MArch, National Technical University of Athens, Greece
Eleni Boni| Senior Architect Engineer
MArch, Department of Architecture Master Degree in Architecture and
Urban Design & Studies, University of Thessaly, 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
Nikos Antonoulis | Architect Engineer
Civil Engineering and Surveying Engineering and
Geoinformatics Department (in progress)
BSc Hons Architectural Studies, Strathclyde University (in progress), UK
Dimitra Stergiou | Architect Engineer
MArch, École Polytechnique,
Democritus University of Thrace, Greece
Nikos Klironomos | Architect Engineer
MArch, École Polytechnique,
Democritus University of Thrace, Greece
Elina Varouxaki | Architect Engineer
MArch, National Technical University of Athens, Greece
Anna Papageorgiou | Interior Architect
Interior Architecture, Decorative arts & object design,
West Attica University
Msc Interior Architecture: Adaptive reuse, Hasselt University
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 | Studio Manager
MSc, London Metropolitan University, UK
Natasa Gounari | HR assistant
Diploma, Surgery Nursing - IEK SBIE, Athens, Greece
ngounari@block722.com
Christina Dimitropoulou | Administrative assistant
School of Philosophy, University of Athens (in progress ), Greece
Eleni Tsakalou | Accounting Assistant
MSc, Mathematical Finance &Risk Analysis, University of Athens, Greece
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
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)
Xenia Bouranta | Architect Engineer, Interior Architect
MArch, National Technical University of Athens, Greece
xbouranta@block722.com
Dimitris Papageorgiou | Senior Architect Engineer
MArch, National Technical University of Athens, Greece
Graphic & Branding Design Certification, CalArts, California Institute of the Arts, US
Electra Polyzou | Architect Engineer
MArch, National Technical University of Athens, Greece
electra@block722.com
Kostis Vatanidis | Architect
BSc, University of East London, London, UK
MSc, TU Delft, Delft, the Netherlands
kvatanidis@block722.com
Despoina Kolovou | Architect Engineer
MArch, University of Patras, Greece
MSc, Lighting design, Hellenic Open University, Greece (in progress)
dkolovou@block722.com
Iasonas Diavatis | IT Assistant
MEng, Chemical Engineering, National Technical University of Athens, Greece
MSc, Computer Science, Athens University of Economics and Business, Greece
idiavatis@block722.com
Nansy Nikolopoulou | Architect Engineer
MSc Research in Architecture: Architectural Design-Space-Culture στο School of Architecture, NTUA, Greece
Giorgos Tsilomelekis | Junior Architect
MArch, Aristotle University of Thessaloniki, Greece
Tzemil Moustafoglou | Architect Engineer
MArch, École Polytechnique, Democritus University of Thrace, Greece
tmoustafoglou@block722.com
Evangelos Evangelou | Junior Architect
MArch, Department of Architecture, University of Ioannina, Greece
eevangelou@block722.com
Vasilina Tzouma | Junior Interior Architect
Interior Architecture, Decorative arts & object design, West Attica University
Konstantina Chronopoulou | Junior Architect
BSc in Architectural Studies, Cardiff University
MArch of Architecture, Cardiff University
Maria Xatzikallia | Junior Architect Engineer
MArch, École Polytechnique, Democritus University of Thrace, Greece
Anita Peslis | Junior Architect Engineer
MArch, Department of Architecture, University of Ioannina, Greece
Panagiotis Konstantopoulos | Junior Civil Engineer
MEng, Civil Engineering, National Technical University of Athens, Greece
pkonstantopoulos@block722.com
Elisavet Argyropoulou| Junior Architect
MArch, National Technical University of Athens, Greece
Elena Calapis
Cleaning Ambassador
recognition
IADA 2024, International Architecture & Design Awards, Architecture &Design Community, Personalized Home Creation, Platinum Winner *Viglostasi
IDA, International Design Awards, Residential Interior Design / Houses - Single/Family Dwelling, Gold winner Interior design award *O Lofos
Architecture MasterPrize 2023, Residential project, winner *O Lofos
Muse Hotel Awards, Resort - World-Class Adult Beach Resort, winners 2023 *Casa Cook Samos
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
The Plan Award 2023, shortlisted *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