A Single-Family House in the Karst Region, Slovenia (Architect: Dekleva Gregorič Architects; Photo: Janez Marolt)
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A Single-Family House in the Karst Region, Slovenia  - Site Plan (Architect: Dekleva Gregorič Architects)
Site Plan. Architect: Dekleva Gregorič Architects

It does not happen every day that a mock-up of a house becomes an acclaimed and awarded project on its own. That is the history of the Compact Karst House, named after the region on the border of Slovenia and Italy.

The Compact Karst House is a prototype of the initially planned home: the first project the client ordered with Dekleva Gregorič has had a vast programme, with all the rooms one would expect in a single-family residence. Because of other investments and the 2008 crisis, the construction of the large house has been delayed. The client followed the architects' idea to construct a mock-up for testing the materials as a temporary residence on the corner of the site.

On 300 square meters of land, thought initially to be an extension of the garden, a tiny house, with 60sqm on the ground floor and a half of it in the attic, with an innovative space programme has been built.

Aljoša Dekleva was aware of the region's building tradition from an early age; he grew up in a stone house designed by his father.

A profound knowledge of vernacular building technologies leads Dekleva Gregorič to architectural discoveries in the field of vernacular architecture.

For example, old houses in the surroundings used to be plastered, so the stone walls were layered in the most efficient way, with no regard to the aesthetics. Only the corners would have been executed in proper masonry. They reflected this principle in the design, casting concrete corners and opening frames, and filling the rest of the wall with brick.

A traditional Karst house in Repentabor, Italy. (Photo: Architect's archive)

A traditional Karst house in Repentabor, Italy.
The same kind of houses are found on the Slovenian side of the border.
Photo: Architect's archive.

Aljoša Dekleva

Dekleva Gregorič Architects

"It was crucial to integrate the roof windows with the rest of architectural elements: they align with the walls, so the light washes the vertical surface to the floor. Although the bedrooms are very small - typological mini version of the house - the inner spaces appear larger due to the zenithal daylight flooding in."

A Single-Family House in the Karst Region, Slovenia (Architect: Dekleva Gregorič Architects; Photo: Janez Marolt)
Architect: Dekleva Gregorič Architects; Photo: Janez Marolt

European historical farmhouses are usually very introverted, with small windows letting only a minimum of daylight to the interior to keep the interiors warm during the cold months and perhaps to create a cosy world within walls for farmers tired of working on their fields.

Dekleva Gregorič used this spatial feature also in other projects. They have collaborated with VELUX on several occasions including on the XXS House, where roof windows play a crucial role in the concept. In general – the roofs are essential in Dekleva Gregorič's architecture, as according to the architects, they are the essential element defining an object's identity. Anything concerning the top – choice of material, chimneys, and the position, size and the make of roof windows shall be designed with great care.

A Single-Family House in the Karst Region, Slovenia (Architect: Dekleva Gregorič Architects; Photo: Janez Marolt)
Architect: Dekleva Gregorič Architects; Photo: Janez Marolt

"The bedrooms are tiny private shelters with VELUX windows only and the walls are used for cabinetry. I think it's important in such an intimate space to forget the surroundings and only contemplate the most abstract form of nature: the sky - and thus connect with the universe."

Aljoša Dekleva, Dekleva Gregorič Architects

Project data

Project: Single-Family House
Location: Vrhovlje, Karst, Slovenia
Architect: Dekleva Gregorič Architects (Team: Aljoša Dekleva, Tina Gregorič, Lea Kovič, Vid Zabel)
Year: 2011-2014
Photos: Janez Marolt
Client: Borut Pertot

VELUX Products used in this case
Roof windows
Roof windows
Product details