The groundbreaking ceremony in November 2009 marked the start of a two-stage construction phase at the Egerkingen site. First, bonainvest built the retirement and nursing home with 72 nursing places and 16 integrated retirement apartments as a total contractor. After demolition of the old retirement and nursing home, bonainvest realized 72 apartments in five buildings on the site, as well as a medical center and a physiotherapy practice. bonainvest added 42 apartments to its own portfolio. Heat is generated at the Sunnepark settlement by means of a central heat pump and gas heating. The buildings are Minergie certified. All apartments were built according to the bonacasa construction standards.
Architects: Frei Architekten AG


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

Key data

Adresse Einschlagstrasse 54/56/58/60/62
4622 Egerkingen / Solothurn
Purpose Apartment property and portfolio
Completion 2014
Useful floor space 6718m²
Number of buildings 5
Number of units 30 Apartment property
42 Portfolio
Investment volume CHF 34.7 Mio.

Residential rental index

Zimmer Total Davon Abverkauf Davon Portfolio
2.5 23 10 13
3.5 28 12 16
4.5 21 8 13