The Terzetto Flat Extension Has a Bold Form with Green Terrazzo & Concrete
Amy Duong — September 1, 2025 — Art & Design
References: conformarchitects
The Terzetto flat extension by ConForm Architects transforms a lower-ground flat in West Hampstead into a bright, sculptural retreat. Inspired by Victorian bay windows, the new form features angled green terrazzo columns rising from a concrete plinth, topped with a clay-toned plaster canopy. This bold composition reorients the living space toward the garden while honoring the geometry of the original building.
Light flows in through new skylights and clerestory glazing, helping to soften the space and draw attention to key materials. A three-leaf sliding pocket door allows the living room to shift into a private guest space, maximizing flexibility. Inside, raw finishes and detailed transitions give the flat a quiet richness. With Terzetto, ConForm Architects create an elegant blend of spatial utility and material contrast that feels grounded, modern, and contextually respectful.
Image Credit: James Reteif
Light flows in through new skylights and clerestory glazing, helping to soften the space and draw attention to key materials. A three-leaf sliding pocket door allows the living room to shift into a private guest space, maximizing flexibility. Inside, raw finishes and detailed transitions give the flat a quiet richness. With Terzetto, ConForm Architects create an elegant blend of spatial utility and material contrast that feels grounded, modern, and contextually respectful.
Image Credit: James Reteif
Trend Themes
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Green Terrazzo Design — Innovative use of green terrazzo in architectural design highlights a growing trend in sustainable and aesthetic building materials.
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Flexible Living Spaces — The adaptation of sliding pocket doors in living spaces reflects a trend towards multifunctional home environments that prioritize flexibility.
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Clerestory Glazing Integration — The increased use of clerestory glazing in home extensions enhances natural light while maintaining privacy, offering a new approach to modern architectural design.
Industry Implications
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Sustainable Architecture — The rise of sustainable materials like terrazzo in bold architectural forms signals opportunities for growth in eco-friendly construction solutions.
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Home Renovation — The emphasis on transforming existing spaces through creative design and materials is reshaping the home renovation industry with innovative solutions.
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Interior Design — A fusion of modern aesthetics with traditional elements in interior design showcases potential for innovative interventions that respect historical contexts.
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