Duplicate Image Chaos in Perth's Planning System: The Key Decisions Ahead

Perth's local governments are sitting on a problem that has quietly compounded for years: thousands of duplicate and incorrectly filed property images embedded in development application records, heritage registers, and Metronet corridor documentation. The issue came into sharper focus in mid-2026 as the WA Department of Planning, Lands and Heritage accelerated its push to digitise legacy records ahead of a July 2027 deadline tied to the state's planning reform agenda. What happens next will depend on decisions being made right now inside council chambers and state agency boardrooms.

The timing matters because WA is carrying the weight of a resources and housing boom simultaneously. The City of Perth and surrounding local governments processed a record volume of development applications through 2024 and 2025, driven by population growth linked to AUKUS workforce migration and iron ore sector expansion. Each application generates a document trail — site photographs, elevation drawings, heritage impact images — and the systems storing those files were not built for this scale. When a duplicate image is lodged against the wrong lot number or DA reference, downstream decisions on approvals, heritage overlays, and infrastructure planning can be based on the wrong property entirely.

Where the Problem Is Worst

The most acute pressure points are in high-churn development corridors. The City of Stirling, which covers suburbs from Scarborough to Balga and borders the HMAS Stirling naval precinct on Garden Island, has flagged internal data quality reviews as part of its 2025-26 business improvement program. The City of Swan, which encompasses Ellenbrook and the Midland Activity Centre — both key nodes in the Metronet rail expansion — is also among the councils understood to be auditing image metadata against the state's Landgate property register.

The Town of Victoria Park, a smaller but densely developing inner-ring council straddling Albany Highway between the CBD and Cannington, encountered the issue in a more visible way when heritage streetscape images from one portion of Albany Highway were cross-filed against lots in another suburb during a 2024 batch upload. The council did not publicly disclose the full scope of the error, but the incident accelerated its move toward a centralised image management protocol aligned with the state government's ePlanning portal.

At the state level, the Department of Planning, Lands and Heritage is the central registry holder for strategic environmental and heritage images. Its ePlanning portal, which went through a significant update in the second quarter of 2026, now flags potential duplicate file hashes at the point of upload — a technical fix that addresses new submissions but does nothing for the historical backlog, which industry insiders estimate stretches back to the early 2010s digitisation push.

The Decisions That Will Define the Fix

Three choices now sit in front of decision-makers. First, whether the deduplication effort is centralised under the state or devolved to each local government. A centralised approach would likely sit with Landgate, which already holds the State Cadastre and has the geospatial infrastructure to cross-reference images by lot and diagram number. A devolved approach is cheaper for the state in the short term but risks creating 30-odd different methodologies across the Perth metropolitan area.

Second, councils must decide how to handle records where the correct image cannot be verified — whether to quarantine the application file, revert to physical archive requests, or flag the record with a disclosure notice visible to planning officers and applicants. Each option carries legal and administrative risk, particularly where heritage overlays or bushfire attack level assessments are tied to those images.

Third, and most consequential for the development industry, is the question of retrospective liability. Where a development approval was issued partly on the basis of a duplicate or mismatched image, the approval itself may not be invalidated — but the heritage or environmental conditions attached to it could be subject to review. The Urban Development Institute of Australia's WA chapter has previously raised the broader issue of data integrity in the ePlanning transition, though no formal position on retrospective liability has been publicly stated.

The July 2027 full-digitisation deadline is the forcing mechanism. Councils that have not resolved their image backlog by that date will be expected to migrate uncleaned records into the state system — effectively handing the problem upstream. For planning officers in Stirling, Swan, and Victoria Park, the next six months are the window to act. After that, the decisions get made for them.