Perth's Duplicate Image Problem: How the City Stacks Up Against Singapore, Amsterdam and Toronto

Perth's property and tourism websites are drowning in duplicate images, and the agencies tasked with managing the city's digital identity are only now catching up with solutions that counterparts in Singapore and Amsterdam rolled out before 2023. The gap matters because recycled, misattributed or outright stolen photographs are distorting the housing market at the worst possible moment — when immigration-driven demand has pushed median house prices in suburbs like Baldivis and Ellenbrook to levels unthinkable five years ago.

The problem is not trivial. When a prospective buyer in Mumbai or Manila clicks through listings on REIWA — the Real Estate Institute of Western Australia's public portal — they frequently encounter the same stock photograph attached to multiple properties across different suburbs. In a market where offshore buyers are making purchase decisions without physically inspecting homes, a misleading image carries real financial consequence.

What Perth Is Actually Doing About It

The City of Perth's digital services team, based at the Council House building on Hay Street, has been running a phased audit of imagery used across its own platforms since February 2026. The audit uses reverse-image detection software to flag photographs that appear in more than one context — a council park shot used simultaneously to illustrate a heritage building grant, for instance. The project is modest but real, and it is one of the few local government initiatives of this type in Western Australia.

Landgate, the state government's land information authority operating out of Midland, has a broader mandate. Its property data systems feed directly into REIWA and multiple third-party portals. Since late 2025, Landgate has been piloting a metadata tagging protocol designed to attach provenance information to property images at the point of upload. The pilot covers roughly 40 suburbs in Perth's northern corridor, including Joondalup and Butler. If the protocol is extended statewide, it would represent the most comprehensive government-led response to the duplicate image problem in any Australian city.

The private sector is less coordinated. Real estate agencies operating along the William Street and Beaufort Street strips in Northbridge and Mt Lawley still largely rely on individual photographers to self-certify the originality of listing images. There is no industry-wide requirement under the Real Estate and Business Agents Act 1978 — Western Australia's primary licensing legislation — that compels agents to verify image provenance before publication.

Singapore Did This Three Years Ago. Amsterdam Too.

The contrast with comparable cities is sharp. Singapore's Urban Redevelopment Authority integrated hash-based duplicate detection into its public property portal, HDB Resale Flat Listings, in mid-2023. The system automatically rejects images that match existing uploads above a defined similarity threshold. Amsterdam's municipality embedded similar logic into its Wonen in Amsterdam housing allocation platform in late 2022, reducing duplicate listing images by what the municipality described at the time as a substantial margin — though Perth's own agencies have not independently verified that figure.

Toronto's approach is different again. The Toronto Regional Real Estate Board introduced mandatory image watermarking for all MLS listings in January 2024, tying the watermark to the agent's licence number. Misuse becomes immediately traceable. Perth has no equivalent mechanism. REIWA, as a private industry body, sets its own platform standards and is not legislatively required to adopt the Toronto model — though industry observers have raised the question at conferences including the Property Council of Australia's Western Australia chapter events in recent years.

The timing makes this urgent. WA's population grew faster than any other state in 2025, according to the Australian Bureau of Statistics, and a large proportion of new arrivals are making initial housing decisions based entirely on digital information. The Metronet expansion — adding stations at Byford, Lakelands and Yanchep over the next two years — is already generating speculative listings in adjacent suburbs, some illustrated with photographs that have been circulating on Australian property platforms since at least 2019.

Landgate's metadata pilot is scheduled for a formal review in October 2026. If the state government moves to mandate the protocol across all property transactions, Western Australia would leapfrog most comparable cities globally. The alternative — leaving the problem to individual agents and private platforms — means Perth stays where it is: behind Singapore, behind Amsterdam, and increasingly behind Toronto.