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

Sydney's public sector is sitting on millions of duplicate digital images — stored across fragmented council systems, state agency servers and development application portals — and the bill for managing that redundancy is quietly climbing. The problem has moved from an IT annoyance to a governance headache, particularly as the NSW government pushes a digitisation agenda tied to its housing approvals overhaul and the ongoing Metro West construction corridor through the inner west.

The timing matters because New South Wales is mid-way through a multi-year push to centralise planning records onto the NSW Planning Portal, which processes development applications for dozens of councils from Penrith to Sutherland. Duplicate images — the same site photograph, engineering diagram or heritage document stored in multiple formats across incompatible systems — inflate storage costs, slow approvals processing and, in the worst cases, feed conflicting information into decisions about where and how to build. With housing the dominant political pressure on the Minns government right now, anything adding friction to the DA pipeline attracts scrutiny fast.

What Sydney Is Doing — And What It Isn't

The City of Sydney Council and Parramatta City Council are among the local governments that have moved portions of their records onto cloud-based document management systems in recent years, a transition that exposed just how much data duplication had accumulated during a decade of scan-and-store digitisation. Parramatta, as the administrative heart of a corridor absorbing a significant share of Western Sydney's population growth, has particularly large volumes of legacy site imagery tied to high-rise development applications along Church Street and the riverfront precinct. The NSW Department of Planning itself acknowledged in its 2024–25 annual report that improving data integrity across its digital systems remained a priority objective — though it stopped short of quantifying the duplication problem.

Infrastructure NSW, which coordinates major project documentation including for the Metro West tunnelling works between Westmead and The Bays Precinct, uses its own project information management systems that sit partially outside the Planning Portal's ecosystem. That means a single site survey image can legitimately live in three or four different places simultaneously — on the portal, in an agency's internal SharePoint environment, inside a contractor's project management platform, and archived in a legacy system nobody has fully decommissioned.

How Global Peers Are Handling It

The contrast with comparable cities is instructive. Transport for London centralised its asset imagery under a single geospatial data framework — tied to its Asset Information Management System — after a 2021 internal review found significant duplication across its surface transport and underground divisions. Singapore's Urban Redevelopment Authority runs a mandatory single-source digital submission standard for all development documentation, meaning duplicate images are largely designed out of the workflow before they enter any government repository. Toronto, which manages a comparable volume of development applications to Sydney's combined councils, rolled out an AI-assisted deduplication layer across its Permit Portal in 2023, reducing redundant image storage by a reported 34 percent within 18 months, according to the City of Toronto's 2024 Digital Services report.

Sydney has no equivalent consolidated deduplication program publicly announced as of July 2026. Individual councils are making their own decisions. The City of Sydney's Smart City Strategy references data quality as a foundation principle, but operational detail on image deduplication sits below the public reporting threshold. Meanwhile, storage costs for NSW government cloud infrastructure — spread across contracts with multiple vendors including Microsoft Azure environments — continue to scale with population and the volume of DA lodgements, which have risen substantially under state-government density targets pushing infill development across the Sydenham to Bankstown corridor.

Practically, the agencies best placed to act quickly are those already inside the NSW Planning Portal ecosystem. A phased deduplication audit — starting with the highest-volume DA corridors, including Parramatta Road and the Bankstown CBD rezoning precincts — would give the state government tangible data integrity wins that support, rather than slow, housing approval timelines. For residents lodging DAs in affected areas, the immediate advice from planning consultants working the western corridor is straightforward: submit documentation in the formats specified on the Planning Portal's current technical requirements page, avoid re-uploading identical files under different names, and keep a local copy of submission receipts. The system's inefficiencies are real, but they are not unnavigable.