A monolithic private spa made from blocks of stone

Smartvoll creates stone spa as "a 21st-century temple of relaxation"

Architecture studio Smartvoll has completed a private spa in the Austrian village of Hinterbrühl with vertical and horizontal stone blocks used to enclose its various functional zones.

The spa pavilion, which is connected to a villa built at the turn of the 20th century by a tunnel, was designed by Vienna-based Smartvoll to be "a 21st-century temple of relaxation".

The building contains a jacuzzi, steam bath, sauna, shower and bar, surrounded by a sun deck incorporating a pool and outdoor hot tub.

A private stone spa and swimming pool
Above: Smartvoll has created a private spa. Top image: it comprises vertical and horizontal stone blocks

The spa is situated to the rear of the property and is elevated slightly above the villa, which helps to enhance the sense of separation between the buildings.

Its walls and roofs are made entirely from Rauris quartzite, a grey stone with light and dark markings that is robust enough to withstand steam, chlorine, heat from the sauna and winter frosts.

A monolithic spa made from blocks of quartzite
Rauris quartzite was chosen for its durability

The stone is used to form vertical and horizontal slabs that seem independent from each other. Walls project beyond the roof elements, which appear to float in places without support.

"The fully consistent use of one single material gives the outside areas an inside feeling and vice versa," said architect Olya Sendetska of Smartvoll.

The entrance to a monolithic spa made from blocks of quartzite
The slabs are designed to seem independent from each other. Photo is by Anton Klyshnia

The building's floor plan is comprised of functional zones separated by a grid of stone walls. The alignment of the stone slabs permits views out towards the garden whilst shielding the more private areas.

"The labyrinthine nested floor plan dispenses with symmetry and repetition, instead, surprising with its structure," said Smartvoll in its description of the project.

"The result is a fitness area with a clear structure and a bathhouse that doesn’t dictate a specific direction, instead, placing the experience itself in the foreground."

The stone-walled interiors of monolithic private spa
The architecture is influenced by modernist principles

The pavilion is open to the outdoors on all four sides, allowing fresh air and daylight to enter. In winter, glass panels hidden in the walls and ceiling can be used to close off the spaces.

Smartvoll claimed that the spa building is influenced by modernist architectural principles, with simple forms used to create functional spaces without any unnecessary ornamentation.

A view to a private swimming pool from a stone spa
All four sides are open to the outdoors

The studio added that the building can also be interpreted as a monument or "temple" to wellness that evokes the sacred status attributed to spas throughout history.

"The monotonous and monumental appearance of the pavilion is exactly what causes the contemplative effect," suggested architect Philipp Buxbaum. "Aesthetics is the creative force behind the atmosphere."

A stone-walled shower room inside a private spa
It lacks any ornamentation

A tunnel that was once an underground bowling alley connects the house with the spa's basement level. Stairs that ascend from the subterranean corridor emerge next to the pavilion's bar area.

Glass partitions divide the underground passage into dedicated exercise areas. Vertical moss panels set into the walls serve to connect the subterranean space with the bathhouse above.

A subterranean corridor lined with stone slabs
The spa is connected to the villa by a subterranean corridor

Smartvoll was established by Buxbaum and Christian Kircher. The studio's previous projects include the creation of an apartment in the loft space of a former tank station in Salzburg and the restoration of a cottage in Klosterneuburg that was surrounded with three timber-clad extensions.

Photography is by Dimitar Gamizov unless stated.

More images

The site plan for a private spa by Smartvoll
Site plan
The floor plan for a private spa by Smartvoll
Floor plan
The section for a private spa by Smartvoll
Section
A monolithic private spa made from blocks of stone
The exterior of a monolithic stone spa by Smartvoll
Inside a private stone spa in Austria
A sauna inside a private stone-walled spa
The monolithic stone exterior of a private spa in Austria
The monolithic stone exterior of a private spa in Austria
A swimming pool outside a private stone spa
A model outside the stone exterior of a private spa in Austria
A model outside the stone exterior of a private spa in Austria
A sauna inside a private spa in Austria
Blocks of stone enclosing a private spa
A swimming pool outside a private stone spa