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

Perth's planning system has a duplicate image problem — and it is getting worse. Development application portals across the City of Perth and several outer metropolitan councils are increasingly clogged with replicated, mislabelled and redundant site photographs, architectural renders and heritage imagery, slowing assessment times at exactly the moment the city can least afford the delay.

The issue sits at the intersection of two pressures that have defined WA's 2025-26 financial year: a state budget surplus built largely on iron ore royalties, and a housing construction pipeline that the Urban Development Institute of Australia WA has described as critically under-resourced. When documentation packages for new apartment towers in Subiaco or infill townhouse developments along Beaufort Street in Mount Lawley arrive with dozens of duplicate images embedded across multiple PDF submissions, planners must manually reconcile the files before assessment can begin.

Why Perth Lags Behind Singapore and Amsterdam

Singapore's Urban Redevelopment Authority rolled out automated duplicate-detection software across its GoBusiness licensing portal in 2023, integrating perceptual hashing — a technique that fingerprints images by pixel pattern rather than file name — directly into the submission workflow. Amsterdam followed in early 2025, embedding similar tooling inside its Omgevingsloket digital planning environment under a European Union-funded smart-city grant program. Toronto's planning division, which processes roughly 4,500 development applications per year according to its 2024 annual report, began piloting AI-assisted image deduplication in the second quarter of 2024 through a contract with a Canadian govtech firm.

Perth has no equivalent program running at scale. The City of Perth's ePlanning portal, which handles applications for the CBD and Northbridge precincts, still relies on applicants self-certifying that documents are not duplicated. The state government's broader digital planning reform agenda, housed inside the Department of Planning, Lands and Heritage, includes a long-term transition to a single online system — but that project's full rollout is not scheduled to complete until 2028.

The comparison is not flattering. Singapore processes a residential building permit in an average of ten working days, according to the World Bank's Doing Business methodology framework. For straightforward applications in inner Perth suburbs such as Leederville or Victoria Park, anecdotal timelines from property lawyers and architects suggest two to three times that duration is common, partly because of administrative backlogs that duplicate documentation compounds.

What the State Government and Local Councils Are Doing

The WA government's Metronet program has accelerated transit-oriented development proposals around stations including Forrestfield and Byford, generating large volumes of planning submissions from multiple competing developers. That surge has sharpened the problem at a practical level. The Western Australian Planning Commission, which assesses major development applications over certain thresholds, updated its lodgement guidelines in March 2026 to require applicants to supply images in a standardised folder structure — a modest administrative fix that stops well short of automated deduplication.

The City of Stirling, which covers suburbs from Scarborough to Osborne Park and handles one of the highest residential DA volumes of any Perth local government, is understood to be evaluating off-the-shelf document management tools that include basic duplicate-detection features. No contract has been publicly announced.

Private sector architects operating out of firms along St Georges Terrace and in the West Perth office precinct have largely adapted by compressing their submission packages and standardising image naming conventions in-house. That shifts the burden rather than solving it.

The practical lesson from cities that have moved further along this path is straightforward: the fix requires investment at the platform level, not at the applicant level. Singapore and Amsterdam both embedded deduplication into the submission portal itself, so the system rejects or flags redundant files before a planner ever opens the package. Perth's 2028 digital planning timeline gives the Department of Planning, Lands and Heritage a window to build that capability in — but only if it is treated as a functional requirement from the start of the build, not an afterthought added after go-live. Given the housing demand trajectory WA is tracking, waiting until the final quarter of the decade to get the paperwork right looks like an expensive form of patience.