Pilot project to promote internal apartment changes in Oerlikon

Tenants in the Accu property can easily change apartments as part of a pilot project. The pilot project in Oerlikon will last for at least one year.

November 2, 2023

Facts and figures

Lack of incentives to change apartment

Our living situations change throughout our lives. When children move out, a baby is on the way, or for various other reasons, the apartment may become too small or suddenly too large. Older people in particular often live in an apartment that is larger than they need. However, it's often not financially advantageous for long-term tenants to move to a smaller apartment. In addition to the cost of moving, they frequently have to pay a higher rent for a smaller apartment than for their previous large apartment due to the increase in market rents.

Pilot project aims to promote internal mobility

In addition to environmental and financial reasons that actually speak in favor of a change of apartment, the scarce housing supply adds a social aspect. CS REF Green Property, a real estate fund focused on sustainability since its launch in 2009, is attempting to solve this dilemma by way of a pilot project. The 17-year-old Accu development in Zurich-Oerlikon promotes the internal mobility of tenants within the 148 apartments. This means that they can exchange apartments within the property on request. The new rent is based on the amount paid by the tenant in the previous apartment per square meter. 

How it works


Tenants tell the property office what size they would like the future apartment to be and provide a reason for the planned change. This is done online in a specially created area for tenants on the property's website.


As soon as a suitable rental property becomes available, the tenants are notified along with details of the move-in date and the future rent. If there are multiple tenants interested in moving to the same apartment, the notification follows the order on the waiting list.


Tenants have 10 days to decide if they want to change.


Once the new apartment is rented, tenants pay only the rent for the new apartment. They then have 14 days to return to the previous apartment.

The rent for the new apartment is calculated as follows:

  • The annual net rent for the previous apartment is divided by its surface area. The result (rent per square meter) is multiplied by the area of the new apartment and thus results in the new annual net rent.
  • The maximum is the market rent at which the apartment would be advertised publicly. The ancillary costs charged depend on the size of the apartment.

Sample calculation

  • The tenant currently has a 4.5-room apartment of 110 square meters and pays a net rent of CHF 1,800 per month.
  • This corresponds to an annual net rent of CHF 21,600.
  • The current net rent per square meter per year is therefore CHF 196.
  • The tenant is now moving to a 3.5-room apartment of 90 square meters.
  • The net rent for the new apartment is therefore CHF 1,470 per month (90 square meters multiplied by CHF 196 divided by 12).

Source:, August 2023. For illustrative purposes only

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