Reconstruction of the KALFAR fashion boutique – minimalist interior by OOOOX
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KALFAR boutique

The showroom interior for fashion designer Kalfar is not a conventional shop. It’s a stage — and the clothes are the main act. The brief was clear: create a space that wouldn’t compete visually with the pieces on display, but instead provide them with a perfect, neutral backdrop.

What emerged is a renovation of a commercial space that works with layers of white, levitating elements and one mysterious box — a place from which you can observe the world without the world observing you. We designed the showroom interior as a pure architectural backdrop. No decoration, no added effects.

Showroom: a white stage for fashion

The entrance space of the showroom KALFAR functions as a clean gallery. Walls, floors and furniture are unified by a white render that gives the space a sculptural, monolithic appearance. Mirrors visually expand the room and multiply the light.

Everything is designed so that nothing distracts — not even the lighting. Instead of stand-alone design pieces, we chose a simple minimalist track system with white cylinders that almost disappear into the space. The only design element that is meant to be seen is the clothing itself.

The black steel rails are designed so that their fixings vanish among the hangers. The bars appear to float in space, without visible support, letting the clothes hang freely — as if suspended in mid-air.

Reconstruction of the KALFAR fashion boutique with concrete finish – minimalist interior by OOOOX
Entrance area of the KALFAR fashion boutique in a minimalist style | design by OOOOX Detail of a white concrete finish wall and white railing of the spiral staircase in the minimalist interior of the reconstructed fashion boutique | OOOOX White concrete finish unified across the floors and walls of the KALFAR fashion boutique | OOOOX
Floating office cube made of patinated smoked glass in the minimalist interior of the KALFAR fashion boutique | OOOOX

The floating studio

The defining element of the entire interior is the “cubicle” — a black box suspended in space above the showroom. It’s the designer’s private studio and retreat, accessible via a hidden staircase that visitors downstairs often don’t even know exists.

The black, floating volume within an otherwise sterile white space creates a strong visual contrast and a sense of tension. The geometry is precise, the materials raw.

The box is built from a steel structure partially embedded into the vault and clad in patinated smoked glass with a cloud-like effect. The glass is one-way — you can see out from inside, but not in from outside. The designer can work, observe what’s happening in the shop and keep track of clients, without losing their privacy.

Detail of a private floating fashion designer’s office, steel structure with patinated smoked glass walls – reconstruction of the KALFAR fashion boutique | OOOOX
White concrete finish unified across the floors and walls of the KALFAR fashion boutique | OOOOX Floating office cube made of patinated smoked glass in the minimalist interior of the KALFAR fashion boutique | OOOOX Floating office cube made of patinated smoked glass in the minimalist interior of the KALFAR fashion boutique | OOOOX

A Staircase as a sculpture

The space is connected by a spiral steel staircase that functions as a standalone artistic element. It has no central load-bearing column — just individual treads, thin steel “razor blades”.

The upper section of the railing is white and merges with the showroom interior, while the treads transition to black as they descend, creating a graphic line that guides the visitor underground.

Top view detail of the steel spiral staircase in the KALFAR fashion boutique | design by OOOOX
Spiral delicate steel staircase in the interior of the minimalist reconstruction of the KALFAR fashion boutique | OOOOX Detail of a delicate steel spiral staircase in the interior of the reconstructed KALFAR fashion boutique | OOOOX
Detail of a minimalist designer clothing rail | reconstruction of the KALFAR fashion boutique | OOOOX

Basement workshop

The lower floor serves as the working back-of-house: workshop, fitting room, kitchenette and toilet. Here too we hold to the same principle — everything is white, clean and functional.

It’s a place where ideas take shape and where things are made. A space stripped of visual noise so that attention can focus on the craft alone.

View of the minimalist steel spiral staircase and tailor’s mannequin in the interior of the KALFAR fashion boutique | design by OOOOX

Craft and bespoke details

The entire interior is the result of a fully bespoke design approach. There are no off-the-shelf products here — everything was made in collaboration with glaziers, carpenters and render specialists.

From the floating rails to the glass box to the slender steel staircase. No unnecessary branding, no logos on the furniture. The luxury here doesn’t lie in a designer armchair in the corner, but in the fact that the space gives absolute priority to what matters most to the client — their work.

Spiral delicate steel staircase in the interior of the minimalist reconstruction of the KALFAR fashion boutique | OOOOX

A renovation no one would have expected

Originally it was a dark, neglected space — a bar and gaming room with a thick layer of visual chaos that had nothing to do with fashion.

The commercial interior renovation therefore didn’t begin with design, but with stripping back. In the basement section we also had to address a technical issue with damp. The floors were designed as ventilated — using an “igloo” system that allows air circulation and stabilises the underground environment.

These are the things that don’t show up in the final photographs, but determine whether the space will work in the long run.

Perhaps that’s precisely why the contrast works so powerfully today. From a place most people would have walked past without a second glance, a clean, calm showroom has emerged. A space that doesn’t need to explain itself — it simply works.

Original condition of the demolished spiral staircase during the reconstruction of the KALFAR fashion boutique interior | OOOOX Original condition of the KALFAR fashion boutique before the reconstruction by architects OOOOX Top view detail of the original spiral staircase during the reconstruction of the KALFAR fashion boutique in Prague | OOOOX

Why we love renovations

Curious about how we approach interior design projects like these? Read more about it here in the RENOVATIONS section—it’s our favorite area of expertise.

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by Radka - 20. 4. 2026

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