Click on a photo to see more and read a project description.


The house is a very typical tube house constructed on the plot 4m wide and 20m deep.

The front and back facades are entirely composed of layers of concrete planters cantilevered from two sidewalls, inspired by the Saigonese culture of displaying green on private houses. 

We named this tropical, unique and green house as Stacking Green because its facades filled with vigorous and vital greenery. The green facade and roof top garden protect its inhabitants from the direct sunlight, street noise and pollution. Furthermore, natural ventilation through the facades and 2 skylights allow this house to save a huge amount of energy in a harsh climate in Saigon. 

Concerning these ecological approaches, we referred a lot to the bioclimatic principles of traditional Vietnamese courtyard house.

Stacking Green


Located in the center of Ho Chi Minh city, the house was designed for two families; a couple in their sixties and their son’s couple with a child. The plot has a bilateral character. It is in a typical developing and urbanizing area, facing to a noisy and dusty street. But it is also very close to the river and the Saigon Zoo with a plenty of greenery.

Against a backdrop of this duality, the concept of the house is to accommodate two different lifestyles in a tropical climate; one is a natural and traditional lifestyle, utilizing natural lighting and ventilation, and the other is a modern and well-tempered lifestyle with mechanical equipments such as air-conditioners.

The house is composed of two different spaces positioned alternately. Spaces for modern lifestyle are allocated in three floating volumes wrapped by concrete pattern blocks. Between volumes are two in-between spaces covered by glasses and widely open to the exterior, where the residents enjoy their natural life with wind, sunlight, green and water.

Status: Built in 06. 2013

Program: Private house

Location: Ho Chi Minh City, Vietnam

GFA: 516 m2

Client: Individual

Contractor: Wind and Water House JSC + Danang Company

Photographs: Hiroyuki Oki

Collaborator: Sanuki + Nishizawa architects

Design Credit: Vo Trong Nghia Architects (VTN Architects)

Partners: Vo Trong Nghia, Shunri Nishizawa, Daisuke Sanuki

Binh Thanh House


Under rapid urbanization, cities in Vietnam have diverged far away from their origins as rampant tropical forests. In Ho Chi Minh City, as an example, only 0.25% area of the entire city is covered by greenery. 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 connections with nature.

“House for Trees”, a prototypical house within a tight budget of 155,000 USD, is an effort to change this situation. The aim of project is to return green space into the city, accommodating high-density dwelling with big tropical trees. Five concrete boxes, each houses a different program, 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.

Status: 04.2014

Program: Private House

Location: Ho Chi Minh City, Vietnam

GFA: 474.32 m2

Client: Individual

Contractor: Wind and Water House JSC

Photographs: Hiroyuki Oki

Design credit: Vo Trong Nghia Architects (VTN Architects)

Principal Architects: Vo Trong Nghia, Masaaki Iwamoto, Kosuke Nishijima

House for Trees


Status: Completed 2015

Program: Residence

Location: Thanh Hoa, Vietnam

Architect Firm: Vo Trong Nghia Architects (VNT Architects)

Site Area: 767 m2

GFA: 203 m2

Client: Individual

Contractor: Wind and Water House JSC

An House


The project is located on Van Tri Road, Dong Anh District, Hanoi. As it belongs to an isolated restaurant & villas complex with good security, an open garden design is applied to create the connection from indoor to outdoor with nature.

The basic idea aims to provide daily living spaces with a rammed earth wall system. Rammed earth is not a new material in Vietnam but not widely used. Most of its known applications have been through the house systems of ethnic minorities in the Northwestern region such as Ha Giang, Cao Bang, Lao Cai. Their houses are mainly built in a traditional way (named “trinh tuong”) in which the soil is rammed down cautiously. Those walls are made of clay, kaolin or mud taken from the foot of a limestone mountain, then rammed by wooden frame into thick earth walls which keep the indoor space warm in winter and cool on summer days.

The aim is to promote the above advantages and to limit disadvantages of bearing capacity of traditional rammed earth walls by modern technology and machinery. That made VTN Architects decide to use this material for the Dong Anh House. The project has the two-story-construction area at 500m2 in an 800m2 land area. The owner is a family with a large number of members, thus there’s a requirement for many private spaces as well as sharing spaces to connect with each other.

Living room and dining room in the center of the house is connected to nature through a large view of both front & back gardens. Space organization is coherent and convenient for people to use. The amount of fruit trees on the roof, along with the open garden around the house is another emphasis that makes a green, cool and friendly environment to the people. And the sloping roof is also a reasonable design for tropical monsoon climate in Vietnam.

The rammed earth wall has a 350mm thickness, 2-story-height and eliminates the use of the concrete pillar. Materials are taken from different land mines, about 30km from the construction site. With many types of earth soil, walls have different authentic textures which make the house an extraordinary appearance. After being collected, filtered, grinded, then mixed with cement, additives, the earth soil is added to formwork and compacted.

Generally, the project gets attention because of the novelty in materials, its modernity and usability in function and the friendliness in its architectural style & landscape.

Architect Firm: VTN Architects

Principal Architect: Vo Trong Nghia

Design Team: Ngo Thuy Duong, Do Minh Thai, Tran Mai Phuong, Nguyen Duc Trung

Contractor: Wind and Water House JSC.

Status: Completed  (2017)

Program: Private House

Location: Hanoi, Vietnam

Site Area: 800m2

GFA: 374m2 (1F: 268m2, 2F: 106m2)

Photographs: Hiroyuki Oki

Client: Individual

Dong Anh House


The Breathing house is for a single family, located in the heart of Ho Chi Minh City. The plot is 3.9m wide and 17.8m deep, only accessible by a tiny alley with crowded surroundings. Within this extremely high-dense neighborhood, we aimed to design a house that introduces an external environment while ensuring privacy.

Due to the circumstances of the site, the opening of the building was physically constrained to the front, top and back of the house. In order to adjust the distance between neighboring buildings while maximizing the opening area, we wrapped the aforementioned three surfaces of the building with a “green veil”, which is made of creeper plants that grow on a steel mesh. This soft layer, as an environmental diffuser, filters direct sunlight and prevents the interior space from overexposure to the outside, without the feeling of isolation. It is composed of planter boxes at each floor slab, with modularized galvanized steel elements attached to it. This structure provides a green view throughout the house, which also protects the residents from urban crime.

Inside the “green veil”, the building consists of 5 tower-like volumes that are staggered and connected to each other, arranged in between the two boundary walls. The external spaces created by the staggered arrangement of the volumes, which we call “Microvoids”, play a role in providing myriad indirect lighting and ventilation routes throughout the building. In the narrow and deep plot shuttered by neighbors on both sides, it is more environmentally effective to promote ventilation for each corner of the house, by multiple “microvoids”, rather than having a singular large courtyard. The “microvoids” have openings on each of the floors, through which the residents have a more longitudinal and diagonal see-through view from everywhere, looking into the green and other spaces. The staircase is also designed as one of the microvoids with top light and openings facing the rooms. The porous composition of the building reduces the use of air conditioning to enhance natural ventilation, creating both spatial and visual connection and depth in the house.

The roof terrace is covered by the “green veil”, becoming a space full of greenery which is rare in the crowded city area. The significance of the project is that it creates a green space, in the heart of a growing megacity. We hope the essence of this design would give positive influence to the cities in Vietnam, which is losing its green spaces at an alarming rate.

Project name: Breathing House

Status: completed in 2019

Location: Ho Chi Minh City, Vietnam

Site Area: 69.5m2

GFA: 343m2

Design Firm: VTN Architects (Vo Trong Nghia Architects)

Principal Architects: Vo Trong Nghia, Kosuke Nishijima

Project Architects: So Adachi

Photography: Hiroyuki Oki

Contractor: Wind and Water House JSC

Breathing House


Vietnam has an abundance of nature and townscapes that are registered as World Heritage Sites. Economic growth due to the increase in tourism has raised the standard of living but has also given way to reckless development by clearing away nature. 

To tackle this situation, we wanted to create a house that would connect people and nature. Ha Long, home to Ha Long Villa, is a beautiful coastal city in northern Vietnam, 160 km northeast of Hanoi. It is also home to the UNESCO World Heritage Site of Ha Long Bay. In particular, it is a city abundant with local industries such as fisheries and coal mining, and it is a region that is rapidly developing alongside its tourism industry. The site is near the coast and overlooks Ha Long Bay with a landscape made of thousands of large and small rocks.

In such a rich setting, we have designed a sustainable home that exists in harmony with the surrounding environment and seeks to become part its landscape. The main concept of the house is to create space where people can live in a forest.

In creating a surrounding forest, the house is comprised of a pentagon within a pentagon that establishes spatial layers of interior and semi-exterior spaces filled with greenery. This composition creates deep shadows as part of the double skin green facade against the hot tropical climate. This buffer space between the interior and exterior spaces protect the house against the hot climate and noise. Every semi-exterior space is connected by the main spiral staircase. There is a spatial sequence from the outside to the inside, from ground to roof, and through the semi-exterior space with a large window and plenty of greenery to feel the rich natural landscape and city view from different angles.

The semi-exterior space connects the interior and the terrace part of the garden, and is a place to promote various living activities. It is a multi-purpose space which serves as a connection between each space. It is a place for gardening, sightseeing, sitting, walking and it also connects to the living space. These distinctive space offers residents options in their daily lives, like whether to dine inside or outside on a particular day. The various movements in the resident’s lives are also conveyed to the neighborhood through exterior of window façade.

Exterior walls are made by rough exposed concrete which creates an impression of stone found in Ha Long Bay. The greenery in the semi-exterior spaces casts shadows on this strong facade, creating an ever-changing appearance over time. The contrast between the rough concrete and soft trees expresses a unique impression to the outside. Additionally, with dozens of plants planted on the roof, we create an area several times larger than the original green area.

Ha Long Villa is one of the prototypes of “House for Trees”, which is a series of residential projects. The aim of the series is to bring green spaces back into the city, and to design as much greenery as was present in the original landscape to provide a healthier life to people living in the city. Due to the simplicity in the concept, the idea of “House for Trees” can be multiplied almost anywhere in tropical climate regions.

As part of the vast landscape, Ha Long Villa harmonizes with the natural environment. And Ha Long Villa aims to be a space where people return to living surrounded by nature.

Status: Built in 2020

Program: House

Location: Ha Long, Vietnam

Site Area: 514 m2

GFA: 1,190 m2

Client: Individual

Design Credit: Vo Trong Nghia Architects (VTN Architects)

Principal Architects:Vo Trong Nghia

Design team: Nguyen Van Thu

Ha Long Villa


This is a residential house located in Gia Lai city, central Vietnam. The site is 7-meters wide and 40-meters deep, and is one of the typical lots for “tube house”, a traditional typology for residences in the province.

In this house, the long corridor, which is an unavoidable factor for tube houses to connect bedrooms, is transformed into a continuous and sequential space to serve the functions of living and dining spaces, as well as an “outdoor living” space.
The continuous space has various relationships with exterior spaces such as a triangular courtyard with greenery and a front yard as a garage, and its width and height vary from place to place, giving the residents different experiences among spaces.

The wall of the continuous space was finished by 4-meter-long granite stones, which were quarried out in Gialai city, functioning as a reflector of the light from side and above.

Status: Built in 10. 2011

Program: Private House

Location: Gia Lai, Vietnam

GFA: 510m2

Client: Individual

Contractor: Wind and Water House JSC

Photographs: Hiroyuki Oki

Design Credit: Vo Trong Nghia Architects (VTN Architects)

Partners: Vo Trong Nghia, Daisuke Sanuki, Shunri Nishizawa

Gia Lai House


15-year-old existing house, located in the city center, suffered from dim, dark, wet and moldy environment, which are typical conditions for many of the older houses in Hanoi. The house was secured and closed by security bars and shutters, making balconies unused space. To remedy this situation, the house is renovated to live with green and abundant light.

The house is characterized by green facade named “Greenfall”, a pleasant green waterfall which attracts both from interior and from exterior, providing leafy-scape to the streets. Old security fences were removed and replaced with galvanized steel trellis, attached to existing balcony, on which climbers grow. From the interior, every room can enjoy the view of green and get fresh air. through it.

The green facade and the roof garden with many kinds of vegetables and flowers as well as trees, function together to reduce energy consumption, protecting house from harsh West sunlight.

This system of green façade and roof is prototypical and applicable to all buildings in tropical climates. It can be a seed to realize a potential Green City in tropical countries, offering solutions for their serious urban problems.

Status: 02.2013

Program: Private house

Location: Hanoi, Vietnam

GFA: 387,9m2

Client: Individual

Design Credit: Vo Trong Nghia Architects (VTN Architects)

Principal Architects: Vo Trong Nghia, Takashi Niwa, Tran Thi Hang

Architects: Ngo Thuy Duong, An Viet Dung

Contractor: Wind and Water House JSC.

Photographs: Hiroyuki Oki, Vo Trong Nghia Architects

Green Renovation


The house is located in Nha Trang, a city in central Vietnam surrounded by the beautiful ocean and mountains. 

The client wanted a large house with a large garden. Answering to this request, a single roof is designed as a hanging garden to plant numerous trees and plants on it. The local building code, however, requires almost 50% of the roof area to be covered by gray or orange-color tilings and to be sloped. To obey this rule but maximize the green area atop, the roof is divided into parallel bands of greened roofs and tiled roofs in an alternating sequence. 

The interior spaces of the house are structured by this system of parallel bands. Under the tiled roof are the living, dining and bed rooms, while service spaces, such as bathrooms, storages and circulation spaces, are located under the greened roof, where the ceiling height are limited because of the deep soil layers for trees atop. A void and three patios are designed within the system of bands to enhance natural lighting and ventilation. 

The house is one of the latest variations of the serial house project called ‘house for trees’. The large single roof is departing from the scale of private house. It is more like an infrastructure or a pocket park open to the neighbors. Gently sloped, this roof-landscape is visually connected to the surrounded mountains. In the shadow of trees, the residents can enjoy the views and spend their life with full of greenery.

Principal Architects:Vo Trong Nghia + Masaaki Iwamoto

Office Credit:VTN Architects (Vo Trong Nghia Architects)+ ICADA

Office URL:,

Built in 03.2015

Program: Private house

Location: Nha Trang, Vietnam

Site Area: 492.00m2

Foot Print: 235.2m2

GFA: 276.77m2

Photograph: Hiroyuki Oki

Hoan House


Under the rapid urbanization, cities in Vietnam have diverged far from their origins of being ow density tropical green spaces. Newly developed urban areas are losing their connection with nature. "Bamboo House" is a small residential project in a narrow alley called “Hem” in Ho-Chi-Minh City. 

This project aims at developing the concept of “House for Trees", a series of a prototypical housing design that targets to provide green space within high density neighborhood. In Vietnam, there are countless narrow alleys called “Hem”. They are 2-3m wide, with similar, narrow and long buildings running along both it's sides, resembling a ravine. 

The lanes are lined with imposing forms, and their cold facades give the street a dense and weighty aura. The windows are mostly kept closed to ensure their privacy. With this in mind, 'Bamboo House' has been designed to create a comfortable living space in spite of the limited area available. The site is dense and narrow, with only 2 sides to allow natural ventilation and light into the building. 

The front facade is playful with planter boxes located at random points, creating interest and a more welcoming entrance. The client's love for bamboo and its' high relevance to Asian context resulted in a facade covered with bamboo plantations. In addition, the planter boxes that pop out from the front facade form deep eaves that allow the windows to be kept open even during the rainy season. 

Towards the back end of the house, the design incorporates a semi-open staircase which is enveloped by creepers, allowing the branches and the leaves to function as a buffer layer that cuts out direct flow of sunlight. Moreover, it also creates a comfortable distance between the neighborhoods. This is evidently visible in the bedroom that is close to the open bathroom and staircase. 

The front and the back facade are mostly open, wrapped with greenery, allowing cool wind to pass through the house. As a result, the use of air con in the house has considerably reduced. In addition to growing bamboo on the front facade, the concrete formwork is also made by using bamboo to allow a consistent design language. 

The bamboo texture also helps to reduce the intense and heavy appearance of conventional concrete wall and thus, improves the overall aesthetic quality of the house. The client expresses, 'I wake up to the sound of birds chirruping every morning, as the plantations attract them. My home feels like a jungle in the middle of a bustling city. 

The green spaces also keeps the house cool at all times, reducing the usage of air conditioning. The space also feels larger because of the large openings on 2 sides. This project provides a solution to create a comfortable and open living space that is surrounded by green in a highly dense and small site. It not only meets the functional and aesthetic needs but also connects the people with one another and more importantly, with nature. 

Office Credit: VTN Architects (Vo Trong Nghia Architects) 


Principal Architect:Vo Trong Nghia

Associate Architect: Kuniko Onishi

Status:Built in 07.2016

Program: Private house

Location: District 1, Ho Chi Minh, Vietnam

Site area: 60.72m2

Footprint: 60.72m2

GFA: 217m2 

Contractor: Wind And Water House JSC

Photographs: Hiroyuki Oki

Bamboo House


Due to the rapid urbanization, many cities in Vietnam are losing their tropical green space and low-density landscapes are transforming into a densely populated metropolis. Increasing risk of flood, together with serious air pollution in urban areas has resulted in the situation. 

The Vietnamese new generation is being disconnected from nature. Against this backdrop, VTN Architects (Vo Trong Nghia Architects) is developing a series of the housing project, “House for Trees”, to create green space within a high-density neighborhood. As the most recent project in this series, Stacked Planters House strives to bring greens back to the city and forge an intimate relationship between human and nature.

The house is located in a neatly planned urban area, where the residents built up to the maximum allowable height. Maximum living spaces were achieved here by reducing the green spaces. By bringing greens back to the house, each house serves as a small park in a dense neighborhood.

The house is designed for a typical Vietnamese family with three generations. Each private function is packed into a concrete box that is seemingly stacked randomly. The horizontal concrete slabs, between boxes, are the terraces where trees grow. These semi-outdoor spaces serve as living and dining rooms where people gather.

The “House for trees” series always pays special attention to local and natural materials. What makes this project special, is the terrazzo wall which was a popular material back in the 80s, yet forgotten in recent years.

Project name: Stacked Planters House

Status: Completed 2017

Location: Ho Chi Minh, Vietnam

Site Area: 233.6m2

GFA: 260.8m2

Design Firm: VTN Architects (Vo Trong Nghia Architects)

Principal Architect: Vo Trong Nghia

Project Architects: Masaaki Iwamoto, Nguyen Quynh Han, Kuniko Onishi

Photography: Hiroyuki Oki

Contractor: Wind and Water House JSC

Stacked Planters House


Ha House a private house project for the three-generation family located in an emerging residential area, 15-minutes drive from the center of Ho Chi Minh City, Vietnam. 

The newly built houses around the site form a highly dense neighborhood and they share the outer wall with each other. The site of the project is in a very narrow site of 7-meter wide x 20 meters long. Among such a typical highly dense residential development areas in Asia, we decided to propose a strategy of housing that is suitable for the tropical climate in which greenery and the residents live intertwined. 

The client’s first request is “a large green garden” where children can play and adults can have a BBQ with their family and friends. In addition, the residents also expected a big swimming pool, spaces for exercise, a grandmother’s bedroom, a living room & dining with kitchen, a sufficient parking lot – all on the ground floor. Hence, we proposed to divide the idea of the “large green garden” into smaller connected gardens. 

One Continuous Garden 
Specifically, as the volume of the building is climbed from the ground floor, it is gradually set back while twisting. On the top floor, the house is configured to protrude a two-meter cantilever to the main road. The stepped gardens of the house are placed intertwining with the terrace as they are connected and continue to the top floor. 

Depending on the type of trees, they create umbrage that filters the harsh sunlight and cools down the air for the house. In addition, each tree pot also functions as a blindfold from the main road. On the other hand, the terraces are arranged on each floor with a variety of sizes according to function. At some places, it is designed as a private garden that the residents can access directly from their bedroom. While in another space, the terrace becomes the public garden which everyone can gather. All of these gardens are individual spaces that are also “one continuous garden” where the residents and kids can go through by the steel staircase outside. 

In the interior space, the ground floor and the first floor are connected by a huge central void. It attaches all of the main functional spaces such as the living room, and the dining room with kitchen, the library and the kids’ bedroom to become one space in which the residents can interact with each other. At the same time, through the big openings with different scales and proportions inside the house, the residents can also connect with the greenery outside the house. Thus, we hope that the house will be a bridge that connects people and people as well as people and nature. 

Environmental Strategy 
The gaps that are created by the shifted volumes allows the natural sunlight and cool wind to pass through. In such an elongated site where it is often narrow, we have created open spaces for the house. As the direct sunlight is reduced by the greenery on the facade of the house, the residents’ future electricity usage of air conditioners will also be decreased. 

Because of a limited budget, we were required to reduce the finishing cost for the house as low as possible. Therefore, we applied bricks as finishes, a method commonly used in the construction sites in Vietnam while at the same time reducing the construction expenses in general. In addition, as the labor cost was small, we were able to control the quality of arranging the brick on the construction site. Since brick is also a local material, the carbon footprint from transportation was greatly decreased. 

Connect People and People, People to Nature 
This project is one of the latest projects of the series project “House for trees” which we have been continuing during these past few years. Among them, we aimed for not only to plant trees in houses but also to create a new type of house for trees which the life of residents and nature are more closely intertwined.

Ha House


This house is a place that embraces the hope and dream of the client. It’s the place for business where family’s traditional products are sold. It’s also the place for living of his entire 7 family members, and for gathering friends and relatives to enjoy all kinds of activities together, such as cooking, enjoying nature, playing etc. 

The house is situated in a traditional craft village, at a three-way extremely busy intersection with houses close to each other and almost no space for nature. With the construction area of 740 m2, and a wide arrays of requirements from the client, the architect takes advantage of every alternate space between the functional blocks so that nature can be integrated and be present in the client’s everyday life activities. This does not only make people interact more with nature, but also help the microclimate and release the frustration in large functional spaces.

The inner space comprises the function blocks that are stacked on each other; each floor is rotated to an appropriate angle to create a space for air circulation, sun light and plant landscape trees.  

In the context of the current fast-paced urbanization of Hanoi’s craft villages, dense construction, lack of space for greenery, the architecture of the house is truly an interesting and important touch to the urban landscape that leads to a healthy development of innovative architecture in Vietnam.

Using a 2-layer vertical facade system in the middle of which is small gardens, the architects have utilized an effective approach to architecture. While in the inside the house is a space for residential space, the façade needs to attract clients for the business purpose. Fortunately, the project is located in a famous pottery crafting village of Vietnam, and is also a client’s heirloom occupation. The façade is composed of 4098 local handmade bricks. Bricks are arranged into walls surrounding the building; the outside walls have large and small squares alternating. This outer shell plays a vital role in protecting the house from dust and dirt, creating a private space for the family's living rooms, and also serving as an interesting architectural highlight for the local area.

Architect Firm:	VTN Architects (Vo Trong Nghia Architects)
Principal Architect: Vo Trong Nghia
Design Team: Ngo Thuy Duong, Nguyen Van An, Do Huu Tam, Pham Phuong Thao
Status: Under Construction
Program: House
Location: Bat Trang, Ha Noi, Viet Nam
Site Area: 220 m2
GFA: 740 m2
Courtesy of image: VTN Architects (Vo Trong Nghia Architects)

Bat Trang House


This torus-shaped stone house is located in a quiet residential quarter en route to Ha Long Bay from Hanoi. 

A rising green roof and walls composed of subdued dark blue stones create a landscape, which stands out boldly in the new residential area.

The rooms surround the oval courtyard, making a colony-like relationship with each other. Circulating flow runs around the courtyard and continues to the green roof, connecting all places in the house. This courtyard and green roof compose a sequential garden, which creates a rich relationship between inside and outside the house. Residents experience the changes of the seasons and learn to appreciate their wealthy life with nature, thanks to this sequential garden.

To create a wall with smooth curvature, cubic stones with a thickness of 10cm were carefully stacked. Consequently, the wall performs the play of light and shadow. Massive and meticulous texture of the wall generates a cave-like space, which recalls the image of a primitive house.

Status: Built in 02. 2012

Program: Private House

Location: Quangninh, Vietnam

GFA: 360m2

Client: Individual

Contractor: Wind and Water House JSC

Photographs: Hiroyuki Oki

Design credit: Vo Trong Nghia Architects (VTN Architects)

Stone House


This project is a house renovation in the center of the down town of Hanoi. 

The plot of the old building was 2.8m x 33m. The longest interior view is designed to make comfortable living space and dining space with view to exterior garden. The facade which is covered by reinforced concrete horizontal louver has vertical garden with trees which contributes not only to the residents but also to the city. 

The concrete staircase was relocated to steel staircase to intake sunlight into common rooms locating lower levels. Natural ventilation is maximized with using light well as a pass way of natural wind.

Architect Firm: VTN Architects

Principal Architect: Vo Trong Nghia, Takashi Niwa

Design Team: Nghiem Dang KieuOanh, Do Minh Thai

Contractor: Wind and Water House JSC.

Status: Built in 02. 2014

Program: Private House (Renovation)

Location: Hanoi, Vietnam

Site Area: 85.4m2

GFA: 467.6m2

Photographs: Hoang Le (photo1-16), BENGBENG (photo 17)

Client: Individual

Dinh Liet House


The roof of this house is divided into alternating strips of tiles and vegetation, with some tropical trees, complying the local regulation in the area —60% of a building’s roof has to be covered in traditional tiles— but maximizing the visual effect of green on the roof. As an extension of living spaces, the entire roof garden is accessible to allow beautiful views over the hills of Nha Trang. This is where residents can enjoy outdoor activities under the shades of the trees.

The parallel strips also appear in the interior under the roof. There are two types of strip: narrower strips for secondary functions such as bathroom and storage; and wider strips for living and dining spaces, as well as for bedrooms.
White painted exposed brick walls are used for both interior and exterior. It is a cheap but aesthetically pleasing, rustic but sophisticate solution.

Status: Completed in March 2015

Program: private house

Location: Nha Trang, Vietnam

GFA: 331.9m2

Site Area: 492.0m2

Number of Floors: 2F

Client: individual

Contractor: Thai Minh Company

Design Credit: Vo Trong Nghia Architects (VTN Architects)

Principal Architects: Vo Trong Nghia, Masaaki Iwamoto

Images: Vo Trong Nghia Architects (VTN Architects)

House in Nha Trang


Status: Completed on 2016.02

Program: Residence

Location: District 2, Ho Chi Minh city, Vietnam

Architect Firm: Vo Trong Nghia Architects (VNT Architects)

Principal Architects: Vo Trong Nghia

Design Team: Masaaki Iwamoto, Hsing-O Chiang, Nguyen Tat Dat, Nguyen Duy Phuoc, Takahito Yamada

Site Area: 268 m2

GFA: 275 m2

Photographs: Hiroyuki Oki

Client: Individual

Contractor: Wind and Water House JSC

Binh House


The site is located in a new residential area of Ho Chi Minh City, with a park on its northern side. It is a rare opportunity to get a site in Ho Chi Minh City, which is adjacent to a green public space. We therefore focused on designing a house which becomes an extension of its environment by integrating the green of the park into the interior space of the house.

A large void was created by cutting the volume through the three floors, in the diagonal direction of the section. On the ground floor, the void serves as living room, open to the park; on the top floor as a green covered family room. The façade surrounding the void is covered with ivy plants. Louvres provide shadow on the top floor. The void incorporates both circulation elements and natural elements like plants and trees, providing the private rooms with additional natural light. It gives a feeling of continuity of the park, to all three floors of the building. The house aims to create an environment similar to a forest, despite being indoors.

Contradictory to the common spaces, private rooms such as bedrooms are placed in solid volumes. Planting trees in the opening of these volumes blocks direct sunlight, cools the wind and brightens up the interior space with green.

The void that is opened diagonally upwards brings natural ventilation through the house, as a result of the chimney effect. In that way the use of air conditioners is minimized. Walking through the space, one will feel the wind moving from the living room to the top floor of the house. Green facade eases the intense sunshine of the tropical climate. The model becomes a precedent for housing in tropical climates.

This house is one of the latest projects in a housing series called “House for Trees”. The shortage of green space in Vietnam is causing environmental problems such as urban flooding, overheating and air pollution. Presenting a solution to this problem is an urgent challenge that architecture needs to address.  VTN architects integrates green as much as possible even in small houses, creating pockets of park in the city, and eventually aim for the “green building” to spread to the world.

Project name: Stepping Park House

Status: completed 2018

Location: Ho Chi Minh City, Vietnam

Site Area: 252 m2

GFA: 475m2

Design Firm: VTN Architects (Vo Trong Nghia Architects)

Principal Architects: Vo Trong Nghia, Hidetoshi Sawa

Project Architects: Nguyen Van Thien

Photography: Hiroyuki Oki

Contractor: Wind and Water House JSC

Stepping Park House


“Thang house” is one of the latest projects realized in the “House for tree” series of residential projects. 

Vietnam is known for being an agricultural country, and being able to produce food in the city center sets the founding concept of this project.

“Thang House” is built in Da Nang, which is the third largest city of the country, located in Central Vietnam. The client wished for a rural house which provided fresh air, surrounded by grassland and tropical enriched green that reminds him of the environment from his childhood. We divided the site in two parts, with one containing the living spaces, and the other conceived as a “green lung”. The “green lung” facing the living spaces provides filtered air, diffused light and the aroma of grass and flowers into the house. The green space lost with construction has been reborn as a rooftop orchard that protects the building from sunlight. There are nine boxes arranged on the roof garden with a gap between them filtering light into the circulation spaces. This not only contributes to greening the city, but also serves as a place for urban agriculture that provides fresh vegetables and fruits for the family on a daily basis.

In order to improve sustainability and to reduce running costs, rainwater is recycled by an automatic water supply system and circulated to the roof garden. We try to minimize energy consumption in order to be self-sufficient in both materials and energy.

We believe that “Thang House” will be covered with tropical green throughout year, creating a quiet and peaceful space for the family, and becoming one of the “green lungs” in this rapidly developing city.

Principal Architects: Vo Trong Nghia

Design team: Le Phuong Uyen, Kosuke Nishijima

Office Credit: VTN Architects (Vo Trong Nghia Architects)

Office URL:

Status: Built-in 2019

Program: Private house

Location: Da Nang, Vietnam

Site area: 250 m2

Contractor: Le Van Thang

Photographs: Hiroyuki Oki

Thang House