In Hong Kong, architect Gary Chang’s Domestic Transformer turns a 32 square meter apartment into a series of living environments, using sliding partitions, fold-down elements, and ceiling-mounted tracks to accommodate up to 24 configurations. The project is a long-running experiment in how domestic space can be reprogrammed, asking whether a limited footprint has to mean a limited way of living.
Chang moved into the apartment in 1976, when he was fourteen, sharing the home with his parents, three sisters, and a sub-tenant. The apartment was divided into small bedrooms, a kitchen, bathroom, and circulation space. Without a room of his own, Chang slept in the central passage on a wooden bench after the rest of the family had gone to bed. The experience led him to question the assumption that domestic functions need to occupy permanently defined rooms.
The architect’s design practice has developed this idea through several iterations of the apartment. The space evolved from its original cellular arrangement into an open-plan experiment, then into a version using curtains as partitions before reaching the mechanized Domestic Transformer completed in 2007.
images courtesy of Gary Chang
Sliding walls let the apartment change throughout the day
Chang concentrates services and storage around the perimeter of the apartment and leaves a flexible central area that can be repeatedly reconfigured. The mechanical system is concentrated overhead, with the main sliding partitions suspended from steel tracks fixed to the concrete ceiling. This keeps the floor clear of tracks and allows the storage walls to move across the apartment with relatively little effort. The walls themselves carry much of the apartment’s contents, including appliances, clothing, and media, so moving a partition also changes what is accessible within the space.
Lightweight honeycomb aluminum panels are used for deployable counters and work surfaces, alongside a hydraulic bed that folds away to reveal the living area. Mirrored surfaces and metal finishes create an impression that the boundaries of the apartment are constantly shifting, reflecting light and making the compact interior appear less materially fixed. Among the arrangements are a larger kitchen, a master bedroom, a guest sleeping area, a spa, a cinema and hammock lounge, an enclosed dining room, a walk-in dressing area, and an open studio configuration.
The transformations are particularly revealing because they demonstrate that the project is not organized around a hierarchy of ‘essential’ and ‘non-essential’ domestic functions. The apartment accommodates amenities that might normally be associated with a substantially larger home, including bathing, entertaining, media, storage, work, and overnight guests. When the bed is deployed, the central area becomes a sleeping chamber. When it is folded away, the same floor returns to a living space. Moving storage partitions can create a more enclosed kitchen or open the apartment into a continuous studio. Other configurations turn the interior toward leisure, including a projection setup and a suspended hammock.
Full-height mirrors, aluminum surfaces, and polished metal details reflect light across the interior, making the boundaries of the space less visually apparent. The apartment does not become physically larger, but its surfaces are made to feel less fixed.
yellow-tinted glazing changes the view and atmosphere of the compact interior
DAYLIGHT AND PRIVACY ARE PART OF THE TRANSFORMATION
The flexibility of the apartment extends beyond its walls and furniture. A motorized screen controls the amount of daylight entering through the window, while a yellow-tinted glazing treatment gives the interior a warmer appearance when the screen is retracted. The intervention changes the atmosphere of the room as well as its physical configuration, using light to alter the perception of the compact interior.
Acoustics present a more difficult problem. Moving partitions need enough clearance to slide freely, which makes it difficult to achieve the airtight seals associated with conventional walls. Chang responds by incorporating acoustic isolation into the wet area, where the enclosed steam shower can also serve as a private space for making phone calls.
The compromise points to one of the less visible realities of kinetic architecture: flexibility can come at the expense of some of the qualities provided by permanent construction. The systems have to balance movement, storage, privacy, acoustics, and everyday use within the same small envelope.
movable walls divide the window into changing views of the Hong Kong streetscape
FROM THE SCHRÖDER HOUSE TO HONG KONG’S STREET HAWKERS
Chang’s approach belongs to a longer history of architecture that questions the permanence of the room. Gerrit Rietveld’s 1924 Schröder House used sliding partitions to alter its interior boundaries, while William L. Murphy’s wall-bed system demonstrated how sleeping could be folded into a single-room apartment. Traditional Japanese fusuma and shoji screens offer another precedent for interiors whose boundaries can change according to use.
Chang also draws on a more immediate Hong Kong reference: the city’s street hawkers. Their stalls expand during periods of activity and contract when they are no longer needed, turning limited physical space into a flexible working environment. The comparison is useful because it shifts the idea of transformability away from high-tech novelty and toward a familiar urban practice of making space available only when it is required.
The Domestic Transformer develops this principle at the scale of the home. Its walls, storage units, beds, counters, and screens become components in a larger system of spatial choreography.
with the partitions moved aside, the window opens onto the surrounding city
THE DOMESTIC TRANSFORMER WAS PART OF A LONGER EXPERIMENT
The ideas tested inside Chang’s apartment also appear elsewhere in his work. One important precedent is the Suitcase House at the Commune by the Great Wall near Beijing, completed in 2002. The linear pavilion uses moving and pneumatic elements to change between more open communal arrangements and configurations that provide greater privacy.
Chang later applied related strategies to commercial residential projects in Hong Kong, including serviced apartments where kinetic cabinetry helps make smaller units more adaptable.
The Domestic Transformer therefore represents one stage in a broader investigation rather than a single isolated solution. The apartment allowed Chang to test these ideas at an intimate scale, where questions of movement, storage, privacy, and everyday routines could be experienced directly.
a sliding element reveals storage and hanging space beside the shower
A SMALL HOME THAT ASKS HOW MUCH SPACE WE ACTUALLY NEED
The lasting interest of the Domestic Transformer lies less in the number 24 than in the question behind it. Chang does not make 32 square meters behave exactly like a much larger apartment. Instead, he demonstrates how the same floor area can support a wider range of activities when rooms are no longer treated as permanent entities.
That flexibility is also demanding. The resident has to operate the apartment, move its partitions, deploy its furniture, and accept a degree of mechanical complexity that would be unnecessary in a conventional home. Transformability is therefore not a substitute for space in every sense; it is another way of organizing it.
But in a city where residential space has long been under pressure, the project offers a different measure of domestic capacity. Its architecture is not defined by how many rooms can fit into 32 square meters, but by how many different lives those square meters can accommodate.
The Domestic Transformer ultimately treats the home as something that can change state. A bedroom does not have to occupy the apartment all day, just as a kitchen, dining room, cinema, or workspace does not have to remain permanently assembled. By allowing functions to take turns, Chang turns time itself into part of the floor plan.
a sliding element reveals storage and hanging space beside the shower
a large movable partition shifts across the apartment on its ceiling-mounted track
a suspended hammock transforms the central space into a lounge
the hydraulic bed turns the living area into a bedroom
integrated storage accommodates media and laundry within the apartment’s perimeter
looking out onto Hong Kong’s dense mix of older low-rise buildings and residential towers
when the bed is folded away, the same space becomes a seating area beside the window
the hydraulic bed folds down to create a dedicated sleeping area
sliding partitions close to return the central area to an open configuration
a movable wardrobe opens the apartment’s storage into the living space
a fold-down surface extends the apartment’s kitchen workspace
the compact kitchen sits alongside the apartment’s movable partitions and mirrored surfaces
small fixtures and storage compartments are integrated into the apartment’s perimeter
floor-to-ceiling media shelving becomes part of the apartment’s changing interior system
a projection screen turns the compact interior into a private cinema
project info:
name: Domestic Transformer
architect: Gary Chang
location: Hong Kong
area: 32 sqm (344 sq ft)
studio: EDGE Design Institute | @edgedesignhk
This article is part of designboom’s MODES OF HABITATION chapter, exploring how the spaces we inhabit can reshape the ways we live together. Discover more stories rethinking domesticity, shared living, and the many forms a home can take here.
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