bonainvest developed the concept for the Kastels estate and went on to implement this in full for the building owners.

Grenchen is very popular as a central location for living and working. The town benefits from a motorway link to the A5 and the busy airport and has expanded greatly in recent years.

In the three new multi-occupancy buildings, the residential mix consists of good-sized, bright modern 2.5 to 5.5 room apartments. Penthouse apartments with an elegant roof terrace are another impressive feature.

The project was completed in cooperation with the Bigolin + Crivelli Architekten AG architects’ practice of Grenchen. The buildings are Minergie certified. In addition, the apartments comply with bonacasa construction standards.


Key data

Adresse Alpenstrasse 69 / Alemannenweg 2/4
2540 Grenchen / Solothurn
Purpose Apartment property and portfolio
Completion 2014
Number of buildings 3
Number of units 16 Apartment property
11 Portfolio

Residential rental index

Rooms Total of which for sale of which for the portfolio
2.5 6 3 3
3.5 12 7 5
4.5 8 5 3
5.5 1 1 0