Residential and Commercial Building Aarepark, Olten

Construction of an 8-storey building consisting of two subterranean storeys, two floors with office space, four storeys for residential purposes with a 2.5 m overhang. The floors are vertically interconnected via four staircase cores.

Excavation was secured with nail walls and up to 7 m high deep-anchored underpinnings.

Due to space constraints, the building was divided into three stages.

Recycled concrete was also used to obtain Minergie-Eco certification.

Main Data

  • Building volume: 35'000 m3
  • Concrete: 5'700 m3
  • Steel: 570 tonnes


Credit Suisse Anlagestiftung Real Estate Switzerland


IUB Engineering AG / Aare Architektur + Design, Thommen + Hauswirth Architekten

Construction period


Construction costs

CHF 5.0 million (shell)

Scope of services

  • Preliminary project
  • Construction project
  • Tendering
  • Project execution
  • Execution and construction supervision