Čechvala Architects Stacks Three Aluminium-Clad Volumes Beside a Danube Branch in Bratislava

RDH House sits on Devínska Road in Bratislava's Sihoť district, where the wooded Carpathian foothills drop down to a branch of the Danube. The plot is next to a well-known horticultural centre, inside a flood zone, and bound by a building permit issued in 2009 that partly fixed the footprint, height and position of whatever would go there. For Čechvala Architects, led on this project by Tomáš Čechvala and Katarína Šoltýsová, that meant much of the massing was settled before the design began. The 144 m² house, completed in 2025, is what they did with the room that was left.

The interesting part is how direct the answer is. Three volumes are stacked: a solid base, a glazed living floor, and a small rooftop box that opens onto a terrace. Walls facing the neighbours stay mostly closed, and walls facing the river open up. The whole thing is wrapped in untreated corrugated aluminium, a material most people associate with sheds and agricultural buildings. We think the house works because it doesn't apologise for any of this. Each decision is visible from the street and each one is doing a job.

A House Read Across a Plant Nursery

Most people will first see the house from the horticultural centre next door, over rows of potted shrubs, a timber gazebo and wet gravel paths. From there it looks less like a villa and more like a greenhouse service building that has grown upward. That reading suits the site. The ribbed metal matches the utilitarian language of nurseries, while the glazed middle floor makes it clear that people live here.

In the evening the glass floor lights up and the metal base goes dark and recedes, so the house appears to float above the planting. It's a simple effect, and the photographs suggest it holds up from most angles.

Working Inside an Inherited Envelope

The aerial view shows how tight the situation is: a flat-roofed block among gardens and gabled neighbours, with a road of parked cars on one side and the river on the other. A permit from 2009 set many of the basic parameters, so the architects had no reason to reinvent the volume. They put their effort into its edges, deciding where it closes and where it opens.

The stepped profile is the clearest result. The rooftop box is set back from the floor below, so the house reads as a set of terraces rather than one tall cube. Next to the gabled house across the retaining wall, that step keeps the scale reasonable and creates outdoor space from the height the permit allowed.

Raw Aluminium as a Flood-Zone Material

The cladding choice starts from a practical problem. The site floods, so the architects chose untreated corrugated aluminium for its durability. It is left raw, with no paint and no coating that would chip or need maintenance. The architects also point out that the facade changes with the light and the colours around it, and the photographs support this: the ribs look warm grey under flowering dogwood and almost silver at dusk.

The garage front shows the material at its most direct, a ribbed surface with a door in it. Some people will find that too blunt for a house. We think it's the right register for a building at the meeting point of a nursery, a road and a floodplain.

Terraces That Do the Shading

The cantilevered terraces are the house's climate strategy. They project far enough to block high summer sun from the glazed living floor and still let low winter sun reach deep inside. Textile screens around the terraces can be lowered for extra shade or privacy. This is old passive-design logic, and it is applied here without extra devices.

The side view shows the stacking clearly: the lit corrugated base, the glass living floor, then the balcony above. The slim metal railings keep the terrace edges light, so from a distance the projections read as thin horizontal lines against the wooded hillside behind.

Concrete, Oak and a Freestanding Fire

Inside, the palette is limited and works well. Exposed concrete ceilings, pale timber floors and built-in oak joinery keep the rooms calm, and the full-height glazing provides most of the drama. From the bedroom, a wall of glass opens onto a terrace facing a timber gabled barn, a reminder that this is still semi-rural edge territory.

The black freestanding fireplace, with its round glass firebox between two dark columns, is the one deliberately sculptural object. Placed beside the steel-railed stair void, it marks the vertical centre of the house and gives the open plan a fixed point.

Plans and Drawings

The site plan shows the house as a single black square beside a lane, surrounded by loosely scattered neighbours. The floor plans explain the flexibility the architects describe. The house is organised on a modular structural grid around a central stair, so the internal partitions can be reconfigured later. On the upper floor, slim columns stand freely in the open living space among the dining table, kitchen island and piano.

The top floor is mostly roof. A stair core and two small enclosures sit inside a large rectangular outline, which confirms that the rooftop volume exists mainly to give access to the terrace. The interior footprint there is kept as small as possible.

Why This Project Matters

Many Central European cities have plots like this one: fringe sites with old permits, flood constraints and neighbours on every side. RDH House shows that these constraints can guide a design rather than weaken it. The permit set the envelope, the flood risk chose the material, and the sun angles set the depth of the terraces. The architects' own contribution is clear judgement about where to be solid and where to be glass.

The house also argues for cheaper, harder-wearing materials in private homes. Raw corrugated aluminium on a family house in a capital city is an unusual choice. Paired with a structural grid that lets the interior change over time, it suggests a house intended to last a long time with little maintenance, which is a more useful ambition than most new villas set for themselves.

RDH House by Čechvala Architects (lead architects Tomáš Čechvala and Katarína Šoltýsová), Bratislava, Slovakia. Area: 144 m². Completed: 2025. Photography by Alexandra Timpau, Alex Shoots Buildings.

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