Wollongong's Duplicate Image Problem: The Numbers Councils and Developers Don't Want You to See

Wollongong City Council's development assessment portal processed more than 1,400 applications in the 2024–25 financial year, and a significant portion of those files arrived carrying duplicate images — the same site photograph uploaded three, four, sometimes six times under different file names. It sounds like a trivial bureaucratic nuisance. The data suggests it is anything but.

The timing matters. The Illawarra region is moving through one of its most active construction phases in a generation, with the Port Kembla Renewable Energy Zone attracting industrial investment and the state government's housing supply targets pushing medium-density approvals through suburbs like Fairy Meadow, Corrimal and the Crown Street corridor in the CBD. Any friction in the digital assessment pipeline adds delay — and delay, in a market where construction costs have risen sharply since 2022, adds cost.

What the Data Actually Shows

Duplicate image files are not a minor annoyance measured in kilobytes. A 2024 audit of local government digital planning portals conducted by the NSW Department of Planning and Environment found that redundant attachments — including duplicate images — contributed to file-size blowouts that slowed automated processing across multiple councils. The department did not publish Wollongong-specific figures in its public summary, but the Illawarra region was included in the study's metropolitan-fringe cohort.

At the file level, the numbers compound quickly. A single medium-density development application for a six-unit townhouse in, say, the Berkeley or Unanderra growth corridors might include 80 to 120 supporting images. Industry practitioners familiar with the NSW planning system — without being named here — have described scenarios where 30 to 40 per cent of those images are functional duplicates: identical photos of the same elevation, the same drainage detail, the same street view, submitted by different consultants working on the same job and uploading independently to the same portal. That redundancy inflates file sizes, triggers manual review flags, and pushes assessment timelines out by days or weeks per application.

Multiply that across 1,400-plus applications annually and the aggregate cost to the local economy becomes material. The University of Wollongong's SMART Infrastructure Facility has in previous research estimated that a single week's delay on a mid-scale residential development in the Illawarra carries holding costs — finance, rates, consultant retainers — in the range of $3,000 to $8,000 per week depending on project scale. The figures are not from a study specifically about image duplication, but they provide a concrete frame for understanding what process inefficiency costs at the local level.

Local Systems Under Pressure

Two organisations sit at the centre of this problem locally. Wollongong City Council runs its development applications through the NSW Planning Portal, the state-mandated system adopted progressively from 2021. Separately, Infrastructure NSW and the Hunter and Central Coast Regional Planning Panel — which handles regionally significant development including BlueScope Steel's transition projects at Port Kembla — both rely on the same portal infrastructure.

The BlueScope transition alone is expected to generate substantial planning documentation over the next decade as the steelmaker pursues its green steel pathway. Early-stage concept plans, environmental impact studies and heritage assessments for the Port Kembla industrial precinct routinely run to thousands of pages and hundreds of supporting images. BlueScope's communications to date have not addressed file management practices specifically, but the scale of documentation involved means that even a modest duplication rate produces a measurable administrative burden on the agencies assessing those submissions.

For everyday applicants — the homeowner in Mount Keira adding a secondary dwelling, the small developer converting a Corrimal shopfront — the practical advice is straightforward. Before uploading to the NSW Planning Portal, run a basic duplicate-detection check using free tools such as dupeGuru or the built-in deduplication functions in Adobe Bridge. Rename files with consistent, descriptive labels rather than relying on camera-generated filenames like IMG_4471.jpg and IMG_4471(1).jpg. Keep a master image folder shared across all consultants on the project so that surveyors, architects and engineers are not uploading the same site photos independently.

Wollongong City Council has not publicly released its own data on application processing times broken down by file quality. A formal information request lodged with the council on the question of average assessment days by application type had not been answered as of publication. The council's development assessment team can be contacted through the Service NSW portal or directly at the council's Crown Street offices.