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The Boomerang Athens Κατοικία by Vassilis Siafaricas

The Boomerang Athens Κατοικία by Vassilis Siafaricas is a highly esteemed winner of the very prestigious 2025 Σιδερένιο Βραβείο A' Design Award in Σχεδιασμός Αρχιτεκτονικής, Κτιρίων και Κατασκευών Competition Category.


ΣιδερένιοΑρχιτεκτονική· 2025

The Boomerang Athens Κατοικία

by Vassilis Siafaricas

Client: Ecléde

Σιδερένιο Βραβείο A' Design Award Winner in Αρχιτεκτονική Category

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The Design

About The Boomerang Athens Κατοικία

Το Boomerang Athens αντιπροσωπεύει την ολοκληρωμένη ανακατασκευή μιας κατοικίας που αρχικά κατασκευάστηκε το 2010, η οποία τώρα βρίσκεται σε εξέλιξη προς την πιστοποίηση Leed Gold. Στόχος αυτού του έργου είναι ο επαναπροσδιορισμός της πολυτέλειας δίνοντας προτεραιότητα στη βιωσιμότητα, την ενεργειακή απόδοση και την τεχνολογία αιχμής. Ο βιοφιλικός σχεδιασμός του ενσωματώνει στοιχεία όπως η παθητική ψύξη, η προηγμένη μόνωση και τα συστήματα ανανεώσιμης ενέργειας, με στόχο την επίτευξη ελάχιστου περιβαλλοντικού αποτυπώματος. Η κατοικία ενσωματώνει την καινοτομία με την κομψότητα, καθιερώνοντας ένα υποδειγματικό πρότυπο για τη βιώσιμη αστική διαβίωση στην Αθήνα.

The Recognition

About the Σιδερένιο Βραβείο A' Design Award

Το σχέδιο The Boomerang Athens Κατοικία κέρδισε το Σιδερένιο Βραβείο A' Design Award, μια διακεκριμένη αναγνώριση που απονέμεται σε καλά σχέδια που πληρούν τις επαγγελματικές και βιομηχανικές απαιτήσεις που αναμένονται από καλοσχεδιασμένες δημιουργίες. Οι νικητές του Σιδερένιου Βραβείου επιδεικνύουν μεγάλη δεξιοτεχνία, υψηλή εξειδίκευση, ειδική κατανόηση και δημιουργική ικανότητα των δημιουργών τους. Το σχέδιο The Boomerang Athens Κατοικία αναμένεται να είναι μια πολύ εκτιμημένη, θαυμαστή και αγαπημένη δημιουργία που είναι πρακτική και καινοτόμα. Αυτό το σχέδιο που βραβεύτηκε με το Σιδερένιο Βραβείο A' Design Award ενσωματώνει τις βέλτιστες πρακτικές του κλάδου και έχει επαρκή τεχνικά χαρακτηριστικά συνδεδεμένα με τεχνογνωσία και ταλέντο. Το σχέδιο The Boomerang Athens Κατοικία γίνεται σεβαστό για την επιμέλειά του και έχει σχεδιαστεί για να προσφέρει βελτιώσεις στην ποιότητα ζωής που βοηθούν να γίνει ο κόσμος ένα καλύτερο μέρος.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties
This design is a Leed Gold to-be-certified, net-zero energy luxury residence that seamlessly integrates sustainability, smart technology, and contemporary aesthetics. Unlike conventional developments, it prioritizes energy efficiency, advanced automation, and biophilic design, ensuring minimal environmental impact without compromising elegance. Its smart home systems, innovative ventilation, and high-performance materials set a new benchmark for sustainable high-end real estate.
Dimensions & Packaging
The residence spans 425 sqm across four levels. Ceiling heights range from 2,800 mm to 3,200 mm, optimizing natural light and ventilation. Triple-glazed, thermally insulated aluminum windows enhance energy efficiency. Underfloor heating by Rehau, a vrv air-conditioning system by LG, and a knx automation network regulate indoor climate. The rooftop pool integrates a high-efficiency heat pump with dimensions 8 m x 3 mmm x 1,5 m.
Tags
Leed certified, Leed gold, smart home technology, sustainable architecture, luxury real estate, urban regeneration, biophilic design, energy-efficient materials, KNX automation, Double Regeneration Metropolitan Park, Athens luxury houses
Production Technology
The Boomerang design was developed using parametric modeling, energy simulations, and LEED-certified methodologies to achieve optimal efficiency. The structure was reinforced with high-performance insulation, thermally broken aluminum windows, and Rehau underfloor heating for passive energy savings. knx automation controls HVAC, lighting, and security, ensuring seamless operation. Sustainable materials, including low-voc finishes and photovoltaic-integrated pergolas, enhance both performance and aesthetics.
Design Challenge
The biggest challenge was balancing luxury with sustainability while retrofitting an existing structure. The historical challenge lay in preserving architectural integrity while modernizing the design. Socially, creating an eco-friendly yet high-end home required shifting perceptions of luxury. Externally, strict LEED regulations, energy laws, and material limitations demanded innovative solutions. Overcoming structural constraints and integrating smart, efficient systems was a key breakthrough.
Research
This applied research transforms an existing property into a Leed Gold-certified smart home with net-zero energy. Using structural audits, energy tests, and Leed guidelines, a team of architects and engineers optimized insulation, smart systems, and ventilation. Results showed enhanced efficiency, luxury, and sustainability. The project sets a new standard for eco-friendly real estate, proving that design, business, and sustainability can coexist seamlessly.
Inspiration
The Boomerang was inspired by the desire to harmonize sustainability with contemporary luxury while redefining urban living standards. It was motivated by the challenge of transforming an existing structure into an environmentally responsible, energy-efficient, and technologically advanced residence. Drawing from LEED principles, modern architectural trends, and the natural landscape, the design sought to create a seamless dialogue between innovation, functionality, and aesthetics.
Project Duration
The project began in Athens in late 2023 and will be completed in May 2025 as Greece’s first Leed Gold certified residence. It integrates net zero energy solutions, smart technologies, and structural reinforcements. Adjacent to the future Double Regeneration Metropolitan Park, it offers unobstructed views, urban cooling, and green access. This benchmark in luxury sustainable architecture enhances air quality, biodiversity, and the connection between urban living and nature.
Operation Flow
The Boomerang Athens is designed for effortless, smart living. The home adapts to its residents, adjusting lighting, temperature, and energy use automatically for maximum comfort and efficiency. Large windows flood the space with natural light while insulating against heat and cold. The rooftop pool and outdoor spaces create a seamless indoor-outdoor experience. With sustainable materials and energy-saving technology, it offers luxury with a conscience, reducing environmental impact without compromising comfort.
Team Members
Designer: Vassilis Siafaricas
Developer: Vassilis Siafaricas
Mechanical Engineer: Vasilis Mastrogiannis
Image Credits
Image #1: Photographer / Illustrator / Creator Kyriakos Trikaliotis, Ownership of ECLÉDE.

Image #2: Photographer / Illustrator / Creator Kyriakos Trikaliotis, Ownership of ECLÉDE.

Image #3: Photographer / Illustrator / Creator Kyriakos Trikaliotis, Ownership of ECLÉDE.

Image #4: Photographer / Illustrator / Creator Kyriakos Trikaliotis, Ownership of ECLÉDE.

Image #5: Photographer / Illustrator / Creator Kyriakos Trikaliotis, Ownership of ECLÉDE.

Video Credits: Video by ANGEL BLEND.

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