How Zurich's Property Listings Ended Up Drowning in the Same Photographs

Walk through Zürich's online rental portals today and you will notice something odd. The same kitchen photograph appears for a flat in Wiedikon and, scrolling further, the identical image turns up again for a listing in Schwamendingen. Different addresses, same picture. The problem of duplicate imagery in residential property listings has become systematic enough that it is now drawing scrutiny from digital transparency advocates, letting agencies, and cantonal housing offices alike.

This matters in July 2026 for a specific reason: the city's Wohnungsnot — the housing shortage that has made Zurich one of Europe's least affordable rental markets — means prospective tenants already face brutal conditions. When the photographs they rely on are duplicated, recycled, or simply borrowed from stock, they are making decisions about flats they have effectively never seen. The opacity compounds an already lopsided market.

A Problem Built Over Time

The roots of the duplicate-image problem go back to roughly 2018 and 2019, when Swiss property portals including Homegate and ImmoScout24 expanded their listing volumes sharply as demand from the city's growing financial and pharmaceutical workforce pushed vacancy rates to historic lows. Zurich's cantonal vacancy rate hit 0.07 percent in 2023, according to figures published by the city's statistical office, Statistik Stadt Zürich — a number that effectively means there were almost no empty flats. Landlords and agencies, knowing demand would guarantee a response regardless of listing quality, had little incentive to invest in fresh photography for every unit.

At the same time, a wave of property management consolidation followed the 2023 UBS-Credit Suisse merger. Several mid-sized real estate management firms that had serviced portfolios held by Credit Suisse's asset management arm were absorbed into larger parent structures. When those portfolios moved, their digital assets — photographs, floor plans, descriptive copy — moved with them in bulk transfers that were rarely audited for duplication. An Aussersihl three-room flat photographed in 2019 might thus appear on a 2025 listing for a newly renovated unit on Kalkbreitestrasse without anyone in the chain noticing the mismatch.

ETH Zurich's Information Security and Privacy research group, based on the Hönggerberg campus, has published preliminary work on image-hash duplication in Swiss e-commerce contexts, and while the group's focus has not been specifically on property portals, the methodologies they developed for detecting copied product images have been cited by housing consumer groups as directly applicable to the lettings sector. The Swiss Tenants' Association, Mieterinnen- und Mieterverband (MV), which operates a prominent advice centre on Zähringerstrasse in the city's Hochschulquartier, has received a growing volume of complaints from renters who arrived at viewings to find conditions that bore no resemblance to the advertised photographs.

What the Platforms Are Doing — and What They Are Not

Homegate introduced a basic image-duplication flagging tool in early 2025, though the system catches only exact pixel-level copies and misses photographs that have been cropped, re-coloured, or re-compressed. ImmoScout24 has not yet disclosed whether it operates equivalent detection on its Swiss platform. Neither portal could be reached for an on-the-record statement before publication deadline.

Swiss direct democracy creates a route that does not exist in many comparable cities. Zurich's city council has the power to mandate transparency standards for rental advertising through cantonal regulation, and the MV has already signalled it is exploring a popular initiative that would require photographic disclosure standards as a condition of listing on portals operating under Swiss domain registration. Such an initiative would require 3,000 valid signatures from Zurich residents to force a council vote.

For renters navigating the market right now, the practical advice from housing advisers is blunt: use the Swiss reverse-image-search tools available through local digital literacy NGO Digitale Gesellschaft, cross-reference listing photographs against Google Street View where exterior shots are involved, and request a timestamped confirmation photograph from any agency before signing a viewing agreement. The flats themselves are real. The pictures, increasingly, need to be proven.