Substance with potential

The eight-story residential building with five entrances dates back to 1963 and was designed by the renowned Geneva-based architect Georges Addor. At the time of acquisition, the property was largely in its original condition. Although the building was fully leased and structurally sound, its energy performance no longer met the statutory requirements of the Canton of Geneva and clearly exceeded the limit value in force since 2022.

Particular issues included:

  • uninsulated ceilings above the unheated ground floor,
  • a damp flat roof with outdated waterproofing,
  • and large-scale, single-glazed window systems on the south façade.

Refurbishment while occupied

The refurbishment concept followed a clear principle of proportionality: interventions were carried out where they achieved the greatest energy and economic impact, without fundamentally altering the proven apartment layouts.

The 65 apartments, all featuring continuous south-facing balconies, continued to be considered spacious and marketable. Accordingly, interventions within the apartments were limited to window replacement and the installation of thermal internal insulation on the north facade. Individual apartment refurbishments are carried out selectively when tenants change.

Building envelope as the focus – in coordination with heritage protection

The core of the project was the refurbishment of the building envelope, implemented in close coordination with the heritage authorities:

  • South facade: The existing windows were replaced with modern triple glazing providing enhanced sound insulation, complemented by new external sun blinds, new safety-glass balcony railings and the refurbishment of the carbonated balcony slabs.
  • North facade (“façade rideau”): The curtain wall façade was replaced while retaining the visible aluminum grid. Specially developed window elements combined integrated louvre blinds, internal double glazing and an external weather protection layer.
  • Flat roof: The flat roof was completely rebuilt with a vapor barrier, modern thermal insulation, bitumen waterproofing and a gravel layer, and supplemented with a photovoltaic system across the entire permissible surface area.

Sustainability and efficiency in harmony

Building services were also selectively optimized: the heating pipes were retained, but cleaned and fitted with thermostatic valves. The sanitary pipes were given corrosion protection and fully replaced in the basement. Adjustable ventilation elements ensured demand-based air exchange, increasing living comfort while reducing energy consumption.

Following completion of the refurbishment, the property’s energy consumption was reduced by around 50% – despite the strict requirements of heritage protection. The entire property was awarded the HPE GE certificate (Haute Performance Énergétique*) by the cantonal energy department.

Residential location Geneva remains in demand

Proximity to the Geneva economic area, stable demand for housing and forecast population growth underline the attractiveness of the location. Combined with the energy upgrade, the project sustainably strengthens income and value stability within the UBS «Foncipars» portfolio.

Facts & Figures:

  • Construction period: May 2025 to May 2026
  • Investment volume: CHF 9.5 million
  • Occupancy rate: 100%. The property was refurbished while occupied.

The refurbishment project exemplifies UBS «Foncipars»’ strategy of respecting existing values, anticipating regulatory requirements and securing long-term performance through sustainable investments – an example of how responsible real estate management and investor interests go hand in hand.1

Porträt von Elvire Massacand

Elvire Massacand
Fund Manager since 2012

UBS «Foncipars»

UBS (CH) Property Fund – Léman Residential «Foncipars»

Valor 1 442 085

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