Zurich’s affordable flats are coming under pressure from rising wages

18 percent of the Zurich city flats inspected exceed the income threshold, but under current law, any consequences will not be felt until later. This is precisely where two motions tabled on 19 August 2026 come in. They call for higher rents for higher earners and an end to the 15 per cent tolerance.

The dispute centres on a mechanism that has so far been deliberately designed to be slow-acting in Zurich. In the case of self-financing municipal flats, not every individual tenancy is subject to immediate sanctions when income rises. The city first checks whether more than 15 per cent of tenants exceed the thresholds, using a three-year average for this calculation. Consequently, the current rule does not come into effect until several years of assessment have passed at the earliest. It is precisely this buffer that the FDP, SVP and the Centre wish to eliminate politically. Motions 2026/458 and 2026/459 were tabled in the Zurich City Council on 19 August 2026. They call for rents to be linked to tenants’ income growth and for the 15 per cent limit to be scrapped. A regulatory control would thus become a direct price lever for the city’s housing stock. 18 percent is not yet enough to trigger intervention The catalyst is the latest analysis of municipal flats. In 1,400 of the 7,700 flats examined, incomes exceeded the permitted limit. This corresponds to around 18 per cent. Nevertheless, for the time being, these households are neither required to move out nor automatically pay more, as the city explicitly tolerates fluctuations and assesses the proportion not on a one-off basis but over a three-year period. Rent is set at cost for the flats in question. The city therefore does not let this housing stock on a for-profit basis, but in accordance with non-profit guidelines. During the tenancy period, the income limit is only exceeded if the relevant income exceeds 70,000 Swiss francs and, at the same time, amounts to more than six times the gross annual rent. The conservative motions are therefore not aimed at a minor administrative error, but at the fundamental logic of how the housing stock is managed. Cost-based rents would become a control mechanism The political fallout would consequently affect the housing stock. If rising incomes lead directly to higher rents, the function of municipal housing changes. They would then be less of a long-term affordable segment with social mix and more of a model that continuously skims off income surges. According to the motion, however, the increase should remain capped and amount to no more than the local market rent for comparable properties. Resistance is already on the cards. On the left, there is open opposition to income-based rents in municipal housing. For owners, property managers and politicians, this is not a technical adjustment, but a matter of principle concerning the purpose and management of the municipal housing stock. The debate in the city council is likely to intensify in 2027, once further analyses of the letting regulations are available.