Perth Councils and Real Estate Agencies Race to Audit Digital Assets as Duplicate Image Problem Hits Property Listings

Property listings across Perth's northern suburbs are being pulled and reloaded this week after a cluster of duplicate and incorrectly matched photographs surfaced on major real estate portals, triggering urgent audits by agencies from Joondalup to Subiaco. The problem — loosely described in the industry as duplicate image replacement — centres on content management systems that have been silently storing redundant copies of the same photograph under different file names, then serving the wrong image to the wrong listing.

The timing matters. Perth's residential property market is absorbing record immigration volumes, with the Real Estate Institute of Western Australia tracking median house prices in the metro area that have climbed sharply since 2023. Buyers are increasingly making first-contact decisions based entirely on portal photography before they ever visit a street. A photograph of a Balga semi-detached appearing on a Claremont townhouse listing is not a minor clerical error — it is the kind of mistake that triggers formal complaints to Consumer Protection WA and, in some cases, triggers mandatory re-advertising under the Australian Consumer Law.

What Broke, and Where It Showed Up First

The issue crystallised around the middle of last week when Stirling City Council's digital asset register — used internally for development application records and heritage documentation — flagged over 340 duplicate image entries during a routine quarterly integrity check. Council staff confirmed the audit on Friday through a public notice lodged on the council's website, noting the affected files spanned planning records dating back to July 2021. The Stirling register is maintained separately from the commercial real estate portals, but the same underlying problem — inadequate deduplication logic in cloud storage pipelines — has been identified across both sectors.

REIWA, whose platform carries tens of thousands of active Western Australian listings, acknowledged the broader industry issue in a member communication circulated on 2 July 2026. The body did not specify how many listings were affected in the Perth metro region but described the situation as requiring urgent attention from member agencies before the weekend open-home cycle. Several agencies along the Wanneroo Road corridor, including offices servicing the fast-growing Alkimos and Eglinton corridors north of the city, began manually cross-checking their listing photo libraries on Thursday.

The State Records Office of Western Australia, based in the Alexander Library Building on James Street in Northbridge, separately noted that the duplicate-image problem is not unique to property. Heritage bodies digitising photographs of the Swan River foreshore and inner-city buildings have encountered similar deduplication failures when migrating from legacy on-premise servers to hybrid cloud environments — a transition that accelerated across WA public sector agencies after the 2024-25 state budget allocated funding for digital modernisation.

The Practical Cost of Getting It Wrong

Fixing a duplicate image problem sounds straightforward. It rarely is. Agencies must first run a perceptual hash comparison across entire photo libraries — a process that, for a mid-sized Perth agency holding 15,000 to 20,000 listing images, can take between 18 and 36 hours of processing time depending on server capacity. Several Northbridge-based proptech consultancies that service WA real estate firms quoted remediation costs this week ranging from $2,400 for a single-branch audit to upward of $14,000 for a multi-office network with legacy storage going back a decade.

Consumer Protection WA confirmed it received a small number of complaints in the first week of July relating to property photographs that did not match listed addresses, though the agency did not specify the exact count or name the listings involved. Under the Australian Consumer Law, a real estate agent who publishes a materially misleading image — even unintentionally — can face corrective action including mandatory re-disclosure to prospective buyers.

For Perth agencies, the practical path forward involves three steps: running an automated deduplication pass using perceptual hashing tools such as ImageHash or PhotoDNA, re-ingesting verified master files from original photographer deliveries, and implementing file-naming conventions tied to a property's street address and lot number rather than a generic timestamp. REIWA's member services team has advised agencies to complete audits before the next major listing surge expected in late July, when spring market preparation traditionally begins in earnest across suburbs like Mount Lawley, Fremantle and the western corridor through Cottesloe and Swanbourne.