Duplicate Listings Flood Perth's Housing Market, Frustrating Thousands of Buyers

Perth's property market is moving fast enough without buyers chasing listings that don't exist. A growing problem with duplicate and replaced image sets across major real estate portals is muddying the waters for thousands of West Australians trying to find homes in one of the tightest rental and sales markets in the country.

The issue is straightforward but costly in practice: when a property is relisted — either after a failed sale, a price reduction, or a change of agency — its photographs are often re-uploaded under a new listing ID rather than replacing the old entry. The result is the same Balga three-bedroom or Cannington townhouse appearing two or three times in search results, sometimes at different prices, sometimes with contradictory availability dates.

Why It's Hitting Perth Harder Than Other Cities

Western Australia's housing crunch gives the problem extra bite. Perth's rental vacancy rate has been running well below two per cent for an extended stretch, according to figures published by the Real Estate Institute of Western Australia, and days-on-market for sales stock has compressed sharply since 2023. Every minute a buyer spends clicking through a phantom duplicate listing is time not spent on a genuine opportunity.

The Metronet corridor suburbs — Midland, Ellenbrook, and the newer stations along the Yanchep line — have seen particularly heavy listing churn as developers stage, release, and re-release land and house-and-land packages. Those packages are especially vulnerable to the duplicate image problem because builders frequently reuse the same artist's impressions and display-home photographs across multiple lots and stages, making it nearly impossible for a portal's automated deduplication systems to distinguish one Dayton turnkey from another.

Real estate portal operators rely largely on automated image-fingerprinting tools to catch and suppress duplicates before they go live. The technology compares pixel hashes — essentially a digital fingerprint of each photo — and flags near-identical images. But the systems routinely miss duplicates when an agency crops, resizes, or applies a watermark to a photograph before re-uploading, which many do as standard practice. A 2024 industry review by the Australian Digital Commerce Association found that image-based duplicate detection in property portals carries an error rate of roughly 12 per cent for listings where photos have been lightly edited. That figure means thousands of false passes each month on a platform the size of realestate.com.au or Domain.

What Residents and Buyers Can Do Right Now

The practical impact extends beyond wasted clicks. Buyers who contact agents about a duplicate listing sometimes receive quotes or inspection times tied to outdated pricing, creating confusion — and occasionally genuine financial misunderstanding — at a stage when Perth median house prices are sitting well above $700,000 in many northern and southern corridor suburbs.

Consumer Protection WA, the state government agency sitting within the Department of Energy, Mines, Industry Regulation and Safety on Mason Street in East Perth, has the authority to act on misleading property advertising under the Australian Consumer Law. Buyers who encounter listings they believe are misleading — including duplicates that misrepresent price or availability — can lodge a complaint directly through the agency's online portal.

The Real Estate Institute of Western Australia, headquartered in Hay Street, also runs a dispute resolution pathway for members. Buyers can use it to flag agents whose listings practices they consider deceptive, though the REIWA process is voluntary for the agent.

For buyers doing their own due diligence, the most reliable check remains cross-referencing a listing's address against the Landgate title search system, which records every change of ownership and agent authority on a given lot. A search costs $27.20 through the Landgate online portal as of July 2026. It takes about three minutes and immediately reveals whether two competing listings are, in fact, the same property.

Portal operators have indicated they are working on improved deduplication tools, but no firm public timeline has been given for a system-wide fix. Until then, the burden of catching duplicate listings falls largely on buyers — the same buyers already navigating rising interest rates, a constrained housing supply, and a market that simply does not forgive delays.