Perth's Duplicate Image Problem: How the City Stacks Up Against Amsterdam, Singapore and Toronto

Perth's City of Vincent and the State Records Office of Western Australia are both dealing with an accelerating backlog of duplicate and misattributed images embedded in planning submissions, heritage registers and digital asset libraries — a problem that has grown sharply since 2023 as AI-generated photographs became cheap and easy to produce at scale. The issue is not trivial: a single incorrect image attached to a heritage listing on Beaufort Street in Northbridge can stall a development application for weeks and complicate insurance valuations on properties worth millions of dollars.

The timing matters. WA's Metronet expansion has pushed a wave of planning activity through local government offices from Morley to Ellenbrook, flooding councils with documentation packages that rely heavily on photographic evidence of existing structures. At the same time, the housing demand surge driven by immigration and AUKUS-related workforce arrivals has seen property listings turn over faster than verification workflows can keep pace. Duplicate images — the same photograph used to represent two different properties, or a stock image substituted for an actual site — are slipping through processes that were built for a slower market.

What Perth Is Actually Doing About It

The Department of Planning, Lands and Heritage launched an internal audit of its image repositories in March 2026, according to a tender notice published on the WA Government's procurement portal that month. The audit covers digital assets held within the State Heritage Office's database, which lists more than 1,500 entries for the Perth metropolitan area alone. The City of Perth, separately, updated its Applicant Information Pack for development submissions in January 2026 to require georeferenced photographs — images embedded with GPS coordinates — for all applications involving sites within the Central Perth Heritage Area, which takes in precincts from the East End to Northbridge.

Those requirements are more demanding than what most eastern-state councils currently mandate, but they still fall short of what Singapore and Amsterdam have implemented. Singapore's Urban Redevelopment Authority moved in late 2024 to require cryptographic hash verification for all photographs submitted with planning applications above a threshold floor area, a system that flags duplicates automatically before a human reviewer touches the file. Amsterdam's Gemeentelijk Bureau Monumentenzorg — the city's monuments office — introduced an image provenance standard in 2023 that cross-references submissions against the national Beeldbank archive. Toronto's heritage planning division has run a pilot since February 2025 using reverse-image search integrated directly into its ePlans portal.

The Gap Perth Still Needs to Close

None of those automated checks exist yet in Perth's public planning systems. The City of Vincent acknowledged the issue in a February 2026 agenda paper for its Urban Design and Amenity Committee, noting that staff had manually identified a number of duplicate image instances in submissions for infill development sites along Fitzgerald Street and Vincent Street in North Perth over the preceding six months. The paper did not specify a number or a remediation timeline beyond flagging the matter for further review.

Nationally, the Australian Institute of Architects has been tracking the problem since a 2024 survey of its WA chapter found that image verification inconsistencies were a source of delays in roughly one in five planning submissions reviewed by members at that time. That figure has not been independently updated since.

The practical stakes go beyond planning. Real estate platforms operating in Perth, including major portals covering suburbs from Subiaco to Baldivis, rely on listing photographs that agents upload without systematic duplicate checks. Property data firms have noted the issue is compounding in high-turnover rental markets, though no WA-specific public data on the frequency of duplicate listing images has been published by a regulatory body to date.

Perth's immediate path forward is likely to run through state procurement rather than council-by-council policy. The March 2026 audit tender included a scope item for recommending a technical standard for image authentication that could be applied across multiple state agencies. A report from that process is expected before the end of the 2026 calendar year, which would give the WA government a foundation to either adopt a system comparable to Singapore's hash-verification model or propose something built on existing infrastructure already operating within Landgate, the state's land information authority based in Midland.