Photography: Fabio Bonatti
13 / 05 / 2026
In southern Sri Lanka, set among cinnamon plantations and just a few minutes from Ahangama, Trebartha East: The Round House stands as a circular haven suspended within the landscape. A project by Narein Perera where architecture and nature come together in a sensory experience devoid of boundaries.
Set at the highest point of a clearing, this circular structure designed by architect Narein Perera stretches out over a landscape of vibrant green, where the scent of cinnamon – at the heart of a plantation in southern Sri Lanka – and the proximity of a lagoon create a deeply evocative atmosphere. The approximately 12-acre property, surrounded by flat rice paddies, provides 360-degree views over the dense tropical vegetation, emerging as architecture almost camouflaged by the landscape.
The shape of the house arises from a simple, symbolic gesture: a circular line that traces the topography and organises the experience of the space. Elevated on pillars evoking tree trunks and protected by corrugated iron roofing, the structure takes on the lightness of a contemporary treehouse. The building’s crescent-shaped design is organised into volumes housing four bedrooms, communal areas and an infinity pool looking out over the landscape. These volumes are arranged in a seemingly irregular manner, creating solid areas and voids that break the symmetry of the circular form and evoke the organic logic of the forest itself.
For the architect, the project was based on the idea that the building should not compete with its surroundings but, rather, allow the landscape to naturally permeate the living space. The house does not obstruct the views; it merely captures, amplifies and transforms them into an everyday experience. Through wide openings and carefully positioned transparent elements, the exterior seems to flow into the interior almost effortlessly. Natural light plays an essential role here. The large windows allow the sun to flow through the spaces throughout the day, creating patches of light that gradually shift across each floor. This interplay of light and shadow continuously transforms the interiors, giving them a living, ever-changing quality, marked by the rhythm of the hours and the seasons.
The shape of the house arises from a simple, symbolic gesture: a circular line that traces the topography and organises the experience of the space. Elevated on pillars evoking tree trunks and protected by corrugated iron roofing, the structure takes on the lightness of a contemporary treehouse. The building’s crescent-shaped design is organised into volumes housing four bedrooms, communal areas and an infinity pool looking out over the landscape. These volumes are arranged in a seemingly irregular manner, creating solid areas and voids that break the symmetry of the circular form and evoke the organic logic of the forest itself.
For the architect, the project was based on the idea that the building should not compete with its surroundings but, rather, allow the landscape to naturally permeate the living space. The house does not obstruct the views; it merely captures, amplifies and transforms them into an everyday experience. Through wide openings and carefully positioned transparent elements, the exterior seems to flow into the interior almost effortlessly. Natural light plays an essential role here. The large windows allow the sun to flow through the spaces throughout the day, creating patches of light that gradually shift across each floor. This interplay of light and shadow continuously transforms the interiors, giving them a living, ever-changing quality, marked by the rhythm of the hours and the seasons.
Designed in response to Sri Lanka’s hot and humid climate, the house was conceived as a low-energy building, where the choice of low-energy materials was thoughtfully integrated – particularly timber, with its natural insulating properties – contributing to thermal comfort and an architectural presence that seems inherent to the site itself.


