solid concrete facade shields renovated low-rise casa d's garden in athens

Cometa Architects revitalize a 1960s low-rise residence

Casa D rehabilitation by Cometa Architects transforms a 1960s house in a densely populated Athens neighborhood into a modern, low-rise residence with a garden, emphasizing minimal impact and reuse of the existing structural core. Located in Holargos, Athens, Casa D spans 150 sqm and carefully integrates restructuring and expansion in the existing footprint of the old house. The design explores solid facades and strategically placed openings, with the residence nestled in a corner of a residential neighborhood with varied building heights. The choice to retain a low-rise form with a garden minimizes impact and makes optimal use of the old structure’s original concrete foundation. Portions of the slabs were cut to create double-height spaces, and a new steel frame was added on top, connected to the foundation, and reinforced for the area’s seismic conditions.

all images by Giorgos Sfakianakis

three-level garden connects with Casa D’s living spaces

To address privacy issues posed by nearby tall buildings with large balconies, the architects conceived the house as an opaque structure with a west-facing cutout, allowing natural light and creating an outdoor green space, bordered by tall trees. The layout of the new volume centers around a double-height area with a staircase, linking the living area and kitchen to the bedrooms and a studio, topped with a skylight that provides diffuse natural light throughout the home in the mornings. The garden, spread over three levels, connects with the living area and kitchen. During construction, original fruit trees were preserved, with new Mediterranean vegetation added for shade during Athens’ hot summers. Casa D also incorporates a self-sufficient energy system for domestic hot water and air conditioning, using radiant and cooling floor systems and fan coils powered by aerothermal technology. Solar collectors and photovoltaic panels on the flat roof supplement the system, feeding energy back into the municipal grid.

Casa D’s design transforms a 1960s structure into a modern, low-rise residence in Athens

a sustainable, low-impact renovation by Cometa Architects in a densely populated neighborhood

the residence’s garden, spread over three levels, seamlessly connects to the living area

Casa D by Cometa Architects balances privacy, natural light, and energy efficiency

a skylit, double-height staircase links living spaces and adds brightness to the home

double-height spaces create a feeling of openness within Casa D’s compact layout

the west-facing cutout brings in natural light and creates an intimate outdoor green space

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project info:

name: Casa D
architects: Cometa Architects | @cometa_architects

design team: Faidra Matziaraki, Victor Gonzalez Marti, Nicolas De Leon, Alvaro Portoles

structural study: Georgios Tsalikidis

photography: Giorgos Sfakianakis | @g_sfakianakis

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edited by: christina vergopoulou | designboom