At the heart of Oensingen, bonainvest has developed the Roggenpark project with three residential and commercial buildings and a nursing care home on an area of some 7500 m2 for the Gäu Senior Citizens’ Care Cooperative (GAG), together with the citizens’ and civic community.

The location at the heart of Oensingen has enabled a medical practice, a bank as well as a hairdressing and beauty salon to be integrated into the Roggenpark.

As an open total contractor, bonainvest built the centre providing specialized services for the elderly with a residential nursing home, a Spitex support point and a café run by the GAG.

The project was completed in cooperation with the bfb ag architects’ practice of Egerkingen. The buildings are Minergie certified. The project uses district heating supplied by the local district heating alliance. In addition, the apartments comply with  bonacasa construction standards.


  • Useful floor space
    in m²
  • Investment volume
    in CHF Mio.
  • Number of units

Key data

Adresse Hauptstrasse 20 + 22, Sternenweg 2A
4702 Oensingen / Solothurn
Purpose Apartment property and portfolio
Completion 2014
Useful floor space 4658m²
Number of buildings 4
Number of units
Investment volume CHF 25.5 Mio.
Project website

Residential rental index

Rooms Total of which for sale of which for the portfolio
2.5 16 6 10
3.5 26 18 8
4.5 6 0 6