House on the Mountain

9836 Last modified by the author on 24/05/2017 - 11:12
  • Building Type : Collective housing < 50m
  • Construction Year : 2014
  • Delivery year : 2014
  • Address 1 - street : 6845 SULZBERG, Austria
  • Climate zone : [H] Highland Climate(mountainous terrain).

  • Net Floor Area : 604 m2
  • Construction/refurbishment cost : 750 000 €
  • Number of Dwelling : 4 Dwelling
  • Cost/m2 : 1241.72 €/m2

Proposed by :

  • Primary energy need
    105 kWhpe/m2.year
    (Calculation method : Other )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building
​The House on the Mountain was conceived as house for one family with three additional holiday apartments.

It softly nestles against the slope and it’s size, roof shape and materials are inspired by the traditional „Wälderhaus“. The plot shapes the volume horizontally and vertically. As a result the public entrance can be accessed from the lower level and the private family entrance can be reached from the ground floor. The façade is covered by silver fir shingles and additionally structured through horizontal window strips. The interior is equally furnished in wood. The solid wood construction and the use of home grown wood allow for a minimal carbon dioxide consumption. The holistic energy concept comprises the use of a short distance district heating and an energy roof with 112 m² of photovoltaic that is ideally orientated and delivers electricity as well as warm water.

All together this house produces more energy than it consumes – is therefore a ACTIVEHOUSE – and can be used without producing any additional carbon!


    Construction company

    Alpina Bau- und  Holzelemente GmbH

    Erlachstraße 2 A – 6971 Hard T +43 5574 73 595

    general contractor and wood construction


    Oliver Singer, master builder

    execution planning wood work


    Velux Austria

    Veluxstraße 1, A-2120 Wolkersdorf

    daylight evaluation and skylights

    Other consultancy agency

    DI Bernhard Weithas

    Rosenweg 3c, 6923 Lauterach, Österreich

    building physics and energy calculation

    Kirchmann Elektro, Langen

    Gschwend 178, A-6932 Langen bei Bregenz

    electric installations

    Maximum use of home grown wood (construction, facade, heating)

Contracting method

General Contractor

Type of market


Energy consumption

  • 105,00 kWhpe/m2.year
  • 170,00 kWhpe/m2.year
  • Other

    warm water 27,29 kWh/m2a
    heating 33,77 kWh/m2a
    electricity 0,64 kWh/m2a

Envelope performance

  • 0,25 W.m-2.K-1
  • Wall U-value 0.14 W/m2K
    Roof U-value 0.12 W/m2K

  • 0,57

More information

CO2-emission: 6kg/m2a

Real final energy consumption

    29,00 kWhfe/m2.year

    2 015


    • Urban network
    • Others
    • Low temperature floor heating
    • Solar thermal
    • Urban network
    • Solar Thermal
    • No cooling system
    • Natural ventilation
    • Nocturnal ventilation
    • Solar photovoltaic
    • Solar Thermal
    • Other, specify
  • 64,00 %

Smart Building

Urban environment

    rural area, outskirts of a small town, 1000m sea Level. 3 minutes walking distance to the bus station, 5 minutes walking distance to the center: Restaurant, kindergarden, post office, bacery, church, hair dresser, shoe shop, local cheese shop,

  • 901,00 m2
  • 26,00 %
  • 660,00


    Velux skylights including CO2 controlled ventilation system

    Velux Austria

    Veluxstraße 1, A-2120 Wolkersdorf

    HVAC, électricité / ventilation, cooling

    Velux skylights including CO2 controlled ventilation system

Water management

  • 280,00 m3

Indoor Air quality

    CO2 measuring in all main rooms
    automatic window ventilation based on CO2 concentration and temperature > 14°C outside temperature
    controlled domestic ventilation with heat recovery < 14°C outside temperature

Reasons for participating in the competition(s)

* 112 m² photovoltaic integrated in the roof

* 15 m² of warm water panels integrated in the roof

* 15 Velux Skylights for active use of daylight and sun energy

* Ventilation system with heat exchange

* connection to local biomass heat plant

* Use of mostly local (home grown!) wood

* Daylight evaluation

Building candidate in the category

Low Carbon

Low Carbon

Users' Choice

Users' Choice

Green Solutions Awards 2017 - Buildings

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Author of the page
Juri Troy


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Green Solutions Awards 2017 - Buildings