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 & CO Founder
Katja Margaritoglou | Executive Creative Director & CO Founder
recognition
EUMies Van Der Rohe Awards 2026, Nominee *Viglostasi Residence
Robb Report Best of the Best 2026, Winner *Gundari
Αhead Awards, NewBuild Hotel & Sustainability & Resort, Finalist *JW Marriott Crete Resort and Spa
LIV Awards, Living space/Resort – Luxury, Winner *Gundari
Grail Awards 2025, Winner *Gundari
AHEAD Awards 2024, shortlisted *Gundari
100% Hotel Design Awards, Best Resort, Winner *Gundari
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
team
Vasiliki Moustafatzi
Design Director - Senior Architect Engineer
Michael Gryllakis
Construction Manager - Senior Civil Engineer
Steef Teeuwen
Operations Director
Natalie Dillon
Project and Operations Director - Senior Architect Engineer
Efi Spyrou
Art Advisor & Curator
Christina Dimitropoulou
Executive Secretary
Maria Bekakou
Financial & Legal Assistant
Patricia Fakiolaki
Design Lead - Senior Architect Engineer
Georgia Nikolopoulou
Design Lead - Senior Architect Engineer
Marilena Michalopoulou
Project Architect - Senior Architect Engineer
Ersi Mantziara
Design Lead - Senior Architect Engineer
Danai Lazaridi
Senior Interior Architect
Katerina Mavromoustaki
Interior Designer - Architect Engineer
Galanos Katomeris
Project Architect - Senior Architect Engineer
Athina Papachristou
Project Architect - Architect Engineer
Ioanna Petroulaki
Project Architect - Architect Engineer
Dimitris Aidonis
Senior Architect Engineer
daidonis@block722.com
Anastasia Dalma
Legislation & Building Permit Consultant - Senior Architect Engineer
adalma@block722.com
Foteini Chapsa
Project Architect - Senior Architect Engineer
fchapsa@block722.com
Dimitra Stergiou
Project Architect - Architect Egnineer
Nikos Klironomos
Architect Engineer
Elina Varouxaki
Architect Engineer
Anna Papageorgiou
Interior Architect
Theodora Sakellariadi
Project Architect - Senior Architect Engineer
Iro Dermitzaki
Project Architect - Architect Engineer
Chara Styliou
Interior Architect
Ioanna Karakosta
Accounting Assistant
Christina Kontou
Project and Operations Director - Design Lead - Senior Architect Engineer
Francesca Balfoussia
Design Director - Senior Architect Engineer
Nikos Vlachos
Finance and Operations Director
Natasa Gounari
Human Resources Coordinator
Elena Milidaki
Design Lead - Senior Architect Engineer
Apostolos Karastamatis
Senior Architect Engineer
Agni Stasinopoulou
Project Architect - Architect Engineer
Xenia Bouranta
Interior Architect - Architect Engineer
xbouranta@block722.com
Electra Polyzou
Architect Engineer
electra@block722.com
Kostis Vatanidis
Architect Engineer
kvatanidis@block722.com
Despoina Kolovou
Project Architect - Architect Engineer
dkolovou@block722.com
Iasonas Diavatis
IT Associate
idiavatis@block722.com
Nansy Nikolopoulou
Senior Architect Engineer
Tzemil Moustafoglou
Architect Engineer
tmoustafoglou@block722.com
Konstantina Chronopoulou
Architect
Maria Xatzikallia
Junior Architect Engineer
Anita Peslis
Junior Architect Engineer
Panagiotis Konstantopoulos
Civil Engineer
pkonstantopoulos@block722.com
Dimitris Sklavounos
Interior Designer - Senior Architect Engineer
Afroditi Dosopoulou
Project Architect - Architect Engineer
Dimitris Christidis
BIM Coordinator, Senior Architect Engineer
Giorgos Sketopoulos
Architect Engineer
Loukia Voulgari
Senior Interior Architect - Senior Architect Engineer
Panagiotis Kalaitzidis
Architect Engineer
Vivi Annousi
Senior Architect Engineer
Anna Passarea
Front Desk Receptionist
Elena Calapis Housekeeping
Orlando Calapis Housekeeping
