How Wollongong's councils and developers ended up with thousands of duplicate property images cluttering planning portals

The problem did not appear overnight. Wollongong City Council's online development application portal, which handles everything from backyard shed approvals in Fairy Meadow to major industrial submissions at Port Kembla, has accumulated years' worth of duplicate images — the same site photographs, architectural elevations and heritage photos uploaded multiple times across hundreds of applications. The council confirmed in its most recent digital services audit, tabled in May 2026, that the duplication issue had been logged as a known data integrity problem since at least 2022.

Why does this matter in July 2026? Because the Illawarra is in the middle of its busiest development period in decades. BlueScope Steel's green transition plans for Port Kembla, the rollout of the Illawarra Renewable Energy Zone, and sustained pressure on housing supply across suburbs from Dapto to Thirroul have all pushed the volume of development applications to levels the current document management system was not designed to handle. When images are duplicated, assessors spend additional time confirming which version of a document is current, slowing decisions that already face pressure from the NSW Government's housing supply agenda.

How the duplication built up over four years

The roots of the problem trace back to 2021 and 2022, when Wollongong City Council migrated its planning records from an older TRIM-based document system to the state-mandated NSW Planning Portal. The migration was handled in stages, and technical staff at the time flagged that automated batch uploads were not checking for pre-existing file hashes before attaching images to application records. A single DA for a commercial development on Crown Street in the CBD might carry the same rendered elevation image four or five times if an applicant resubmitted amended documents without removing the originals.

Staff turnover compounded the issue. The council's planning technology team lost three senior records management positions between mid-2022 and early 2024, according to council workforce disclosures published in its annual reports. Institutional knowledge about which fields in the portal triggered duplicate attachments walked out with those staff members. Contractors brought in to backfill roles worked from documentation that had not been updated to reflect the migration quirks. Meanwhile, applicants lodging through the NSW Planning Portal's self-service interface had no visible warning when they were attaching files already present on a record.

The University of Wollongong's SMART Infrastructure Facility, which has done previous analytical work for the council on data management questions, identified in a 2024 working paper that government planning portals nationally were experiencing similar structural problems as state-mandated digital migrations outpaced the governance frameworks designed to manage them. The facility estimated that document redundancy of this type could add between 15 and 40 minutes of assessor time per affected application — a figure that compounds quickly across a portfolio of thousands of active DAs.

What the cleanup looks like from here

Wollongong City Council's information management team began a formal duplicate-image replacement and deduplication program in March 2026. The program, budgeted at $340,000 across the 2025–26 and 2026–27 financial years, involves both automated scripts that flag files sharing identical checksums and a manual review layer for heritage and sensitive site imagery where automated matching is unreliable. The Flagstaff Road and Port Kembla industrial precincts have been prioritised first, given the volume of active BlueScope-adjacent applications currently moving through the system.

For residents and applicants, the practical upshot is straightforward. Anyone lodging a new DA through the NSW Planning Portal for a property in the Illawarra Shoalhaven region should check the attachments panel before final submission and remove any files uploaded in earlier draft sessions. Council's development assessment team at the Burelli Street civic offices has updated its lodgement checklist — available on the council website as of June 2026 — to include a specific step prompting applicants to verify no attachment appears twice. Applications with confirmed duplicates are not being rejected outright, but they are being flagged for an additional administrative review step that adds time before an assessment officer picks them up. In a market where build cost pressures are already stretching project timelines, that extra delay is worth avoiding.