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

Perth's property records have a duplication problem. Across multiple government databases — including Landgate's property imagery holdings and the metropolitan planning portals used by local councils from Wanneroo to Rockingham — thousands of property photographs and cadastral images exist in conflicting or outdated versions, creating practical headaches for developers, conveyancers and government assessors alike. The question is no longer whether to fix it, but who pays, who decides, and how fast it happens.

The timing matters because Perth is building at a pace it has not sustained in more than a decade. Metronet station precincts along the Morley–Ellenbrook line are drawing new medium-density proposals at a rate that strains record-keeping systems designed for a slower city. The City of Swan and the Town of Victoria Park both have active structure plans that rely on accurate site imagery to assess development applications. When a database holds two or three versions of the same parcel photograph — sometimes differing by years — assessment officers must manually reconcile records before decisions can be made. That takes time Perth's housing pipeline does not have.

What the Duplication Actually Costs

Industry figures cited in conversations with planning consultants working across the Perth CBD and the inner-northern suburbs suggest that manual image reconciliation can add between three and seven working days to a standard development application assessment. At a time when the WA Government's Housing and Homography Action Plan is targeting 30,000 new dwellings over five years, each week of avoidable delay compounds. The Real Estate Institute of Western Australia has previously noted that median house prices in Perth crossed $750,000 in early 2026, meaning carrying costs on stalled approvals are not trivial for smaller developers.

Landgate, the state's statutory land information authority based in Midland, administers the core cadastral and aerial imagery layers that feed into local government systems. The authority has been working through a data-modernisation program, but the specific question of duplicate image replacement — deciding which version of a property photograph becomes the authoritative record — sits in a gap between Landgate's mandate and the operational systems run by individual councils. No single body currently owns the decision.

The Department of Planning, Lands and Heritage has flagged digital infrastructure as a priority in its ongoing transformation work, but has not publicly committed to a centralised duplicate-resolution mechanism. Without one, the default is that each of Perth's 30-plus local governments manages the problem independently, producing 30-plus different answers.

The Decisions That Will Define the Next 12 Months

Three choices will determine how this plays out. First, the state government must decide whether Landgate gains a formal mandate — and the budget — to run a single authoritative image layer that local councils are required to use, rather than merely permitted to access. The 2026-27 state budget, handed down in May, maintained WA's surplus position and allocated capital to Metronet and the Stirling Naval Base precinct at Henderson, but digital land records infrastructure received no headline funding announcement.

Second, the City of Perth and the City of Stirling — two of the state's busiest approvals authorities — need to commit to a shared data protocol for the Herdsman Lake precinct and the Scarborough Beach Road corridor, both of which straddle council boundaries and currently draw imagery from separate systems. A bilateral agreement there would create a working model that smaller councils could adopt.

Third, private platforms — including the major real estate portals that display listing photography alongside government cadastral data — will have to determine whether they embed real-time feeds from a reformed Landgate layer or continue to run parallel imagery caches. That choice affects not just property listings but insurance assessments, heritage overlays and bushfire-prone land classifications.

A working group convened by the Planning Institute of Australia's WA chapter is expected to report back to member organisations before the end of the third quarter of 2026. That report will carry no legal weight, but it is likely to frame the public debate heading into the second half of the year. Developers, councils and state agencies would be well served to have their positions prepared before that document lands.