The first thing you notice is the height. The lounge rises into a double-height volume, and the transparent duplex interior keeps that space open from wall to wall, so the view runs straight through the apartment. Large windows pull in light and keep the sea horizon present in the background, while the plan moves from the open living area toward quieter rooms without breaking that line of sight.

A living room that stays open to the full height

The double-height open living area gives the apartment its scale. Instead of dividing the volume into smaller rooms, the layout lets the lounge sit beneath the tallest part of the ceiling, with the kitchen and dining zone folded into the same broad field. That openness is practical here: it gives furniture room to breathe, but it also leaves enough surface area for the windows to do their work. The result is a space where the architecture is read in one glance, from the floor plane to the upper edge of the room.

A hidden stair leaves that central volume and leads to the private rooms above or beyond the main living zone. The move is discreet, and that matters. It keeps the transparent duplex interior focused on the shared spaces first, then shifts to the office, master bedroom, children’s room and guest room only when needed. Three bathrooms are distributed in the plan, so the apartment can handle daily use without crowding the open core.

Material choices that keep the room quiet

The palette stays close to the surroundings. Natural materials and calm tones are repeated across the apartment, not as decoration but as a way to hold the light. Pale surfaces, warm wood and stone textures soften the large spans of glazing. Nothing competes with the view. The interior instead borrows from it, using restrained color and matte finishes to keep the room steady when the daylight changes.

That approach is especially clear at the kitchen wall, where a natural-stone look surface forms a strong horizontal band in the open plan. The wall reads as part of the architecture rather than as a separate unit. Its integrated setup keeps appliances and storage visually contained, which is important in a room where the kitchen sits inside the same volume as the lounge. From the living area, it appears as a measured surface with a clear edge, not a collection of separate pieces.

Built-in storage keeps the lines clean

Minimal built-in cabinetry helps the apartment avoid visual noise. The storage runs are slim, flush and measured to the walls, so they support the plan instead of interrupting it. In the circulation zones, the joinery follows the length of the rooms and gives the apartment a continuous rhythm. Open and closed volumes are combined carefully: a niche for display here, a closed panel there, enough variation to keep the surfaces useful without drawing attention away from the main rooms.

The same discipline shows in the way the dining area is handled. A round table sits beneath a concentrated light point, with window openings and curtains framing the edge of the room. The table shape eases the geometry of the apartment and gives the dining zone a softer profile against the long lines of the glazing. Nearby, the wall composition includes open shelving and recessed storage, which keeps everyday objects near at hand while leaving the main plane clear.

Windows, curtains and the edge of the view

Large windows with sea view are not treated as a background effect but as part of the plan. Their scale pulls the exterior into every key room, and the apartment uses that reach to calm the interior. Beige curtains filter the glass without closing it off, so the edge between inside and outside stays readable. In one view, the balcony railing sits low against the horizon; in another, the room meets the glass almost directly. That variation gives the apartment depth, even when the furniture remains restrained.

Light also shapes the smaller transitions. A narrow corridor, with integrated wall planes and door openings, connects the open lounge to the more private areas. The floor continues through these passages, which keeps the movement legible. Instead of breaking the apartment into isolated parts, the circulation works like a sequence of measured turns and openings. The transparent duplex interior depends on those shifts: a bright threshold, a closed panel, a longer sightline, then another open room.

Bathrooms with glass and tiled surfaces

The bathrooms continue the same logic in a tighter format. Tiled zones define the wet areas, while a bathroom glass partition keeps the shower visually open. Built-in niches are cut into the walls, giving bottles and small objects a place without adding shelves or clutter. One bathroom combines a stone-look surface at the vanity with a clear glazed division beside it, so the material palette remains consistent even in the most enclosed rooms of the apartment.

These rooms do not try to mirror the lounge. They work through restraint: tiles, glass, recessed details and light-toned surfaces. That is enough. The apartment already carries enough scale in the main volume, so the bathrooms can stay controlled and precise. They extend the same material language into a smaller setting, which makes the whole plan feel more considered without forcing repetition.

A penthouse shaped by view and proportion

Seen as a whole, the apartment is defined by proportion rather than ornament. The transparent duplex interior relies on height, open sightlines and a stable material palette to hold together the living room, kitchen, dining area and private rooms. Natural materials and quiet tones keep the large glazed perimeter from feeling stark. The sea view is present throughout, but it never overwhelms the interior. Instead, it gives the rooms a reference point, especially where the kitchen wall, built-in storage and curtain layers sit against the glass.

That is what makes the plan memorable: not a single dramatic gesture, but the way each part connects to the next. The double-height open living area carries the scale, the hidden stair organizes the move to privacy, and the bathrooms, storage walls and kitchen edge all stay measured. The apartment reads as an interior built around clarity, with enough texture in the wood, stone and tile to keep the rooms grounded.

Photography by Alice Mesguich.