In Tiong Bahru, a pre-war apartment is recast by PI Architects as a one-bedroom home shaped by ritual, hosting and a considered use of green
In Tiong Bahru, where stairwells still carry the proportions of the 1930s and corridors bend with a certain stubborn logic, a 120 sq m apartment has been pared back and rebuilt as a one-bedroom home for a young couple and their dog. Designed by PI Architects and led by Paul Yeo, the project does not chase nostalgia. Instead, it treats the past as a framework to push against.
Dubbed the Millennial Green House, the unit sits within a pre-war block dating to between 1936 and 1941, its original bones intact. Thick masonry walls and high ceilings remain, but the cellular layout has been opened up. What was once a sequence of small rooms is now a continuous interior that shifts, almost imperceptibly, between sociability and retreat.
Don’t miss: Inside this delightful Japanese-inspired semi-detached house with a void deck

Above A bold painting greets visitors at the entrance foyer

Above A pendant lamp gently illuminates the custom-built bench in the entrance foyer
“The clients envisioned a home that could accommodate their love for wine, art, and social gatherings while still maintaining moments of calm retreat. They requested an open and welcoming communal space for entertaining guests, an integrated wine display, and a bedroom that would feel like a private sanctuary inspired by their travels. The colour green, a personal favourite, was also an important starting point for the project’s design language,” says Yeo.

Above A compact workspace lays concealed just beyond the mesh screen at the foyer

Above A wine richly veined Rosso Orobico stone
The entry sets the tone of the Tiong Bahru home. A curved seating booth is tucked against the wall, its geometry softening what might otherwise be a tight threshold. A pendant lamp, hung low, casts a pool of light that draws you in rather than announcing itself. Opposite, a metal mesh screen holds a floating painting in suspension, part divider, part provocation. Behind it, storage and a wine display are concealed, the latter lined in richly veined Rosso Orobico stone. It is a compact composition, but it does a lot of work.

Above The living area is anchored by another colourful painting
Step further and the Tiong Bahru apartment opens. The living, dining and kitchen areas form a single, continuous zone anchored by a wraparound counter in peacock green sintered stone. The colour is not an accent; it is a constant, threading through cabinetry and surfaces without becoming overbearing. The counter bends to meet the dining table, encouraging a certain kind of gathering where cooking, pouring wine and conversation happen in the same orbit.
A bronze-tinted mirror runs along one side, doubling the space while hiding a storage room. It is a familiar trick, but handled with restraint. Above the dining table, pendant lights fashioned from zippers hover with a slight irreverence. Nearby, a scallop-profiled hood turns a utilitarian element into something closer to sculpture. Shelving overhead carries objects collected from travels, but the display never tips into clutter. The room feels used, not staged.
Read more: Malaysia and Singapore’s Art Deco legacy: Buildings that tell stories

Above A peek at the corridor leading to the common bathroom and private quarters

Above The corridor is lined with Memento Moooi Medley wallcovering, which pays tributes to now-extinct animals
Light enters from a courtyard, a rarity in apartments of this vintage, and moves across the space over the course of the day. It is this light that keeps the palette in check, lifting the deeper greens and the weight of stone.
Beyond the communal zone, the mood shifts. A corridor becomes a gallery, lined with illustrated wallcoverings depicting extinct animals. There is a quiet wit here, but also something more personal. A full-length mirror stretches the passage, concealing the guest bathroom behind it. At the far end of the Tiong Bahru home, reeded glass doors mark the transition into the private suite, filtering views without fully closing them off.

Above Green subway tiles, a burgundy door and an amoeba-shaped suspended mirror create a playful atmosphere in the guest bathroom
The guest bathroom, though small, is not treated as an afterthought. Green subway tiles meet a burgundy door, while an amoeba-shaped mirror floats above the basin. It is a brief, vivid interlude before the apartment settles again.

Above The vanity area in the master bedroom

Above Light-toned timber and curved carpentry foster a sense of gentle retreat in the master bedroom

Above TheTiong Bahru home’s open-to-sky courtyard lends light and a sense of openness to the bedroom
The bedroom is deliberately calmer. Timber surfaces replace stone, and edges soften into curves. A Hästens bed sits at the centre, not as a statement piece but as an anchor for rest. Here, the connection to the outdoors becomes more pronounced. Light enters from both the courtyard and a skylight above the bathing area, shifting the room’s atmosphere throughout the day.

Above A smart glass panel separates the bedroom from the bathing area

Above The panel frosts over at the touch of a button
A smart glass partition separates the bedroom from the bath, turning opaque at the touch of a button. When clear, it allows the two spaces to read as one. When frosted, it restores privacy without heaviness.
The bath itself draws on the language of onsen culture. Honed granite tiles line the space, while patterned glass blocks diffuse light into a soft glow. Above, a skylight filtered through wooden trellises casts changing shadows across the surfaces. Water spills gently over profiled granite edges, creating a subtle waterfall effect. It is not large, but it feels deliberate, a place designed for pause rather than efficiency.

Above The Tiong Bahru home’s onsen-inspired sunken bath
Elsewhere, details reveal themselves slowly. A mirror that conceals a door. A pendant that reads differently depending on where you stand. A kitchen surface that holds both colour and reflection. None of these gestures shout for attention, but together they shape how the apartment is experienced.

Above Green cabinetry with brass handles adds refined contrast, while a scallop-profiled central hood transforms a functional element into a sculptural centerpiece
The project took a year from concept to completion, much of it spent negotiating the constraints of the original structure. Walls could not simply be removed; circulation had to be rethought within what was already there. The result is a home that feels open without denying its origins.
What emerges is not a stylistic exercise but a lived-in narrative. The owners’ interests, in wine, in art, in hosting, are embedded into the plan rather than layered on afterwards. The apartment accommodates a dinner with friends as easily as a quiet evening alone.

Above Another view of the Tiong bahru home’s dining and kitchen area
In a neighbourhood often defined by its past, this home suggests another way forward. It does not preserve for the sake of preservation, nor does it overwrite. It edits, inserts, and occasionally disrupts. Most importantly, it feels inhabited from the moment you walk in.
Credits
Photography: Khoo Guo Jie
Topics





