Family House Prototype in Posazavi by A69 Architects

Today we rediscover this small project located in a former granite quarry in Posázaví by A69 Architects, winners of the BigMat National Prize in Czech Republic’17.

A prototype of a familyhouse in Posázaví, A69 Architects © Tomáš Rasl


The house is located on the edge of a rock above a lake. The project preserves grown trees, emphasizes the view to the water, and allows access to the meadow in the middle of a forest. The purpose of this built project is to check structural, typological, and user qualities of the prototype.


Family House Prototype in Posazavi by A69 Architects
BigMat National Prize in Czech Republic’17

Architect: Boris Redčenkov, Prokop Tomášek, Jaroslav Wertigteam
Collaboration: Michal Nohejl
Area : 235 m²
Year : 2015
Technical design, collaboration: OMEGA project s.r.o. – Jan Škopek, Miroslav Fejfar,
Construction – Radek Brandejsmain
Contractor: (DIY), carpenters – Jiří Kotík, windows – Nevšímal a.s.
Photographer: Tomáš Rasl
Visualization: obrazek.org – Michal Nohejl.


A simple cubic mass 15x15x4 m contains interior spaces formed in a more complex manner.
Organically moulded labyrinth of the interior habitable space allows more day- and sunlight, vistas out and through from the depth of the layout.

A prototype of a familyhouse in Posázaví, A69 Architects © Tomáš Rasl
A prototype of a familyhouse in Posázaví, A69 Architects © Tomáš Rasl


The house hovers over the landscape, it is not founded traditionally. A steel load-distributing modular raft is bedded on existing granite blocks – remnants of former mining.

A prototype of a familyhouse in Posázaví, A69 Architects © Tomáš Rasl
A prototype of a familyhouse in Posázaví, A69 Architects © Tomáš Rasl


A 2×4 timber frame is erected on the raft. The roof structure is nailed trusswork. The roof is flat finished with extensive green. The façade is ventilated made of lumber. Windows are aluminium.A sliding glass wall provides for connecting the living area with an outdoor terrace on the meadow.The interior is monochromatic using different shades of white – a neutral frame for colours of the forest at different periods of a day and year.The house is a DIY type.It can be taken into pieces, it may disappear without a trace left.

A prototype of a familyhouse in Posázaví, A69 Architects © Tomáš Rasl
A prototype of a familyhouse in Posázaví, A69 Architects © Tomáš Rasl