Perth's Duplicate Image Problem: The Key Decisions Councils and Developers Must Make Now

Perth's property and planning sector is facing a quiet but compounding headache: thousands of duplicate and outdated images embedded in development applications, council databases and real estate listings are creating confusion across the metropolitan area, and the decisions about who is responsible for cleaning them up have been delayed long enough that they now carry real financial consequences.

The problem surfaced prominently this year as the WA Labor government accelerated approvals under the Metronet Transit-Oriented Development program, which links higher-density rezoning to stations including Morley-Ellenbrook Line stops and the Thornlie-Cockburn Link. Planners at multiple local governments discovered that site photographs submitted with development applications — some lodged as recently as late 2025 — contained duplicate images from earlier, unrelated projects. In several cases, imagery from Cannington and Mirrabooka sites was cross-attached to applications in Ellenbrook and Midland, roughly 30 kilometres away.

Why This Matters Right Now

The timing is not incidental. WA's Department of Planning, Lands and Heritage is processing a record volume of applications tied to the state's housing demand surge, driven partly by immigration-linked population growth and partly by AUKUS-related defence workforce arrivals near HMAS Stirling at Garden Island. The City of Stirling alone — covering suburbs from Scarborough to Balga — logged more than 4,200 development applications in the 2024–25 financial year, according to publicly available annual report data. Any systemic image duplication inside that pipeline slows assessment officers, creates audit risk, and in the worst cases results in conditions being applied to the wrong site.

The Real Estate Institute of Western Australia has previously flagged data-quality concerns in property listing platforms, noting that duplicate and mismatched images inflate perceived listing counts and confuse buyers in fast-moving suburbs such as Alkimos and Brabham on Perth's northern and eastern growth corridors. Neither issue is trivial when median house prices across the Perth metropolitan area sit above $750,000 — a figure the Real Estate Institute of WA reported in its June 2025 data — and buyers are making six-figure commitments partly on the strength of online imagery.

Three decisions are now sitting at the centre of this: who carries the liability when a duplicate image leads to a misdescribed planning outcome, which software platform or government portal is responsible for flagging duplicates before submission, and whether local governments will receive state funding to audit and correct existing records.

What Happens Next

The Department of Planning, Lands and Heritage is understood to be reviewing its DAP (Development Assessment Panel) submission guidelines, with updated technical requirements for image metadata expected before the end of the 2026 calendar year. Any new rules would apply to the state's five DAP panels, including the Metro Inner-North Joint DAP, which covers high-activity precincts near Perth CBD, Leederville and Mount Lawley.

At the local government level, the City of Perth's planning directorate has already moved toward mandatory filename and metadata standards for attachments submitted through its online portal on St Georges Terrace. Other councils, including the Town of Victoria Park and the City of Bayswater, are watching that rollout before committing to their own changes — a cautious approach given the IT budget constraints that followed state-mandated rate-freeze periods.

For developers and property managers, the practical advice from industry bodies is straightforward: audit image libraries now, before new submission standards take effect and non-compliant applications begin attracting rejection fees rather than just requests for correction. Conveyancers working along the Metronet corridors in suburbs such as Forrestfield and Belmont are already advising clients to cross-check all site imagery against certificate of title records before contracts are signed.

The state budget, which recorded a surplus for the third consecutive year according to the McGowan-era trajectory the Cook government has maintained, does allocate funding to planning system modernisation — but disbursement to individual councils has been uneven. Smaller outer-suburban local governments north of the Swan River may need to wait until the 2026–27 financial year before they see meaningful resources to tackle the backlog. That lag is the key variable. The longer duplicated records sit uncorrected inside planning databases, the harder the audit trail becomes — particularly for infill sites where ownership and site conditions change quickly.