Councils, Planners and Tech Experts Weigh In on Sydney's Duplicate Image Problem Plaguing the Housing Approvals Pipeline

Sydney's already strained planning system has a new headache: thousands of development applications lodged each year are being slowed — and in some cases rejected outright — because duplicate or mismatched images attached to submissions trigger manual review processes that can add weeks to approval timelines. Officials from several councils and planning bodies say the issue is no longer a minor administrative irritant but a genuine bottleneck in a city desperate for new housing stock.

The problem matters most right now because the NSW government has staked its second term on cutting housing approval times. Under the NSW Housing and Productivity Contribution framework, which took effect in October 2023, councils are under pressure to hit consent benchmarks or face state intervention. Any friction in the digital lodgement pipeline — including duplicated floor-plan images, repeated site photographs filed under different file names, or mismatched image metadata — feeds directly into that pressure.

Where the Logjam Is Worst

Cumberland Council in Merrylands, which processes some of the highest volumes of medium-density DAs in Western Sydney, has flagged image-duplication errors as a recurring issue in its planning portal queue. The council's planning committee reviewed the problem at its June 2026 meeting, according to council agenda documents published on its website. Similarly, the NSW Department of Planning and Environment's ePlanning portal — through which most Sydney DAs are now lodged — has seen growing user complaints logged through the NSW Government's feedback system about image submission errors causing automated holds on applications.

Inner-city councils are not immune. Randwick City Council, which covers suburbs from Kensington to Coogee, handles a significant volume of secondary-dwelling and dual-occupancy applications. Planning officers there have noted in publicly available committee reports that image file errors are among the top five reasons for applications being placed on hold pending further information — a category that adds, on average, more than three weeks to assessment timelines.

Specialists in planning technology say the underlying cause is straightforward but the fix is not. Most applicants — particularly owner-builders and small developers — use consumer-grade file management software that does not strip duplicate metadata before upload. The ePlanning system's validation layer flags files with identical pixel hashes or near-identical EXIF data as potential errors, which then routes the application to manual review. A planning technology consultancy that works with several Western Sydney councils — without naming specifics — has described the issue in industry forums as a case of a sophisticated back-end system colliding with unsophisticated front-end user behaviour.

What Needs to Change, and Who Is Responsible

The NSW Department of Planning and Environment has previously said it is investing in upgrades to the ePlanning portal as part of the broader Digital DA Transformation Program, a multi-year initiative that began in 2022. That program includes enhanced validation logic designed to better distinguish genuine duplicate submissions from legitimately similar but distinct images — such as two photographs of the same street frontage taken from slightly different angles. Exactly when that upgrade goes live has not been publicly confirmed.

Industry bodies including the Planning Institute of Australia's NSW division have been pushing for clearer applicant guidance on image file naming conventions, file size limits, and resolution requirements — all of which currently vary slightly between council-run portals and the state ePlanning system. That inconsistency means an image package that clears the Blacktown City Council portal without issue may still trigger a hold on the state system.

For applicants lodging DAs right now, planning lawyers and certifiers advise a simple precaution: manually rename every image file with a unique descriptor before upload, strip EXIF metadata using free tools such as ExifTool, and avoid submitting the same photograph under multiple categories. Architects operating out of offices along Parramatta Road have been circulating informal checklists among their networks to help smaller clients avoid the trap. The NSW government's ePlanning support line — reachable through the Service NSW contact centre — can also flag whether an application is sitting in a duplicate-image hold queue, which at least allows applicants to intervene before a formal hold notice is issued. In a city adding tens of thousands of new dwellings a year, that kind of practical workaround should not be necessary — but for now, it is.