House for Trees design by Vo Trong Nghia Architects

Architects: Vo Trong Nghia Architects Location: Tan Binh District, Ho Chi Minh City, Vietnam Architects In Charge: Vo Trong Nghia, Masaaki Iwamoto, Kosuke Nishijima Area: 226 sqm Year: 2014 Photographs: Hiroyuki Oki Project Architect: Nguyen Tat Dat Contractor: Wind and Water House JSC Construction Cost: 156,000 USD

Under rapid urbanization, cities in Vietnam have diverged far from their origins as sprawling tropical forests. In Ho Chi Minh City, for example, only 0.25% area of the entire city is covered with greenery. An over-abundance of motorbikes causes daily traffic congestion as well as serious air pollution. As a result, new generations in urban areas are losing their connection with nature. House for Trees, a prototypical house within a tight budget of 156,000 USD, is an effort to change this situation. The aim of the project is to bring green space back into the city, accommodating high-density dwelling with big tropical trees. Five concrete boxes are designed as “pots” to plant trees on their tops. With thick soil layer, these pots also function as storm-water basins for detention and retention, therefore contribute to reduce the risk of flooding in the city when the idea is multiplied to a large number of houses in the future. Urban context The house is located in Tan Binh district, one of the most densely populated residential areas in Ho Chi Minh City, where many small houses are crowded together. The site is a remnant landlocked block within this suburb, accessed only by a small pedestrian lane. Resonating with this urban tissue, the house is designed as an accumulation of small fragments. Surrounded by typical Vietnamese row houses on all sides, House for Trees stands out like an oasis. Planning Fitting into the informal shape of the site, five boxes are positioned to create a central courtyard and small gardens in between. The boxes open to this central courtyard with large glass doors and operable windows to enhance natural lighting and ventilation, while remain relatively closed on the other sides for privacy and security. Common spaces such as the dining room and library are located on the ground floor. Upper floors accommodate private bedrooms and bathrooms, which are connected through bridge-cum-eaves made of steel. The courtyard and gardens, shaded by trees above, become part of the ground floor living space. Blurring the border between inside and outside, the house offers a tropical lifestyle that coexists with nature. Material Local and natural materials are utilized to reduce cost and carbon footprint. The external walls are made of in-situ concrete with bamboo formwork, while locally-sourced bricks are exposed on the internal walls as finishing. A ventilated cavity separates the concrete and brick walls to protect interior space from heat transfer.

Source: Vo Trong Nghia Architects/ Hiroyuki Oki

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