The south-facing slope of almost 400 sqm is 60% clad with Eternit Sunskin Roof photovoltaic modules. The bottom four rows incorporate incorporate hybrid panels (PVT) that...
House within Garden
“This is a house for people who want to live ecologically and not just talk about it.“
A breezy living in a landscaped garden

On the edge of Zurich’s urban area is located this replacement building of an existing dwelling from the 1920s. The new residential building is volumetrically based on the simple elements of rural farm buildings.
Towards Tobelhofstrasse, there will be a planted walkway, which will serve as an arcade to the two entrances on the ground floor and form a screen to the street on the upper floors.
The interior of the building is characterised by the load-bearing structure of prefabricated concrete columns and beams, which set the pace of the flats. By means of sliding elements that can be positioned in front of the columns and moved in the plane of the beams, different living situations can be orchestrated – similar to the Japanese house.
To the south, the building opens up to the surrounding landscape and the communal garden through a spacious layer of verandas. Stairways connect the flats directly to the landscaped green space.

On the ground floor, the two staircases are connected to each other and to the south-facing garden by a large communal area.

Side facade and outdoor landscaping.

Thanks to the sliding elements, the flats adapt to their users and their needs.

Building characteristics
  • Building typology
  • Construction type
  • Year of construction
  • Energy reference surface
  • Energy index
  • Energy labelling
Active solar surface 240 m²
Active solar surface ratio <75%
Peak power n/a
Building skin application Solar tiles
Energy production
Building skin
  • Application
    Solar tiles integrated in a pitched roof, inclination 11°.
  • Description
    The PV modules rest on finite roof elements, which in turn rest on precast concrete beams. The bottom four rows incorporate hybrid panels (PVT).
  • U value
  • Fastening system
    The support hooks are screwed into the roof battens.

Photovoltaic tiles and PVT modules are integrated in the pitched roof.

  • Application
    Double wall and framed wooden partitions.
  • Description
    Concrete double wall with an insulated cavity and prefabricated timber framed elements.
  • U value
  • Fastening system

During the building site, the structuring of the facade was distinctly visible.

  • Application
  • Description
    Triple glazing with wooden frame
  • U value

Modular subdivision of spaces, kitchen area.

BIPV module
  • Product
    Eternit Sunskin Roof Glass-Glass mono Type L
  • Manufacturer
    Eternit (Schweiz) AG
  • Cell technology
    Monocrystalline 5BB PERC cell
  • Cell colour
  • Front glass type/customization
    3.2 mm ESG structured
  • Dimensions
    1.300×907 mm, 8×5 cells
  • Nominal power
    195 Wp
  • Specific power
    About 165 Wp/m²
  • Weight
    20 Kg
  • Specific weight
    17 Kg/m²
Technical details

The south-facing slope of almost 400 sqm is 60% clad with Eternit Sunskin Roof photovoltaic modules. The bottom four rows incorporate hybrid panels (PVT) that convert solar energy into both electricity and heat. The roof is mostly prefabricated in the workshop to be quickly assembled on site. The PV modules rest on a wooden substructure, which in turn rests on prefabricated concrete beams. The 18 elements that make up the roof, of three different types, were delivered to the construction site already fitted with the substructure for the solar panels. Once positioned by crane, the interlocking elements were fixed to the concrete beams using anchor bolts.

Hotspot image
Horizontal section
Hotspot image
  • Total cost of the building
  • Price per m³  

The indoor load-bearing structure is made of prefabricated concrete columns and beams.

Parties involved
  • Owner
  • Architect
    Loeliger Strub Architektur GmbH
  • Photovoltaic Installer
  • Photo
    Seraina Wirz, Fanni Müller, Federico Farinatti
Awards and recognitions
  • Awards
  • Publications