How the Central Coast Stacks Up Against Global Cities on Duplicate Image Sprawl in Public Planning

Central Coast Council is quietly working through a problem that has become a quiet administrative drag on planning departments from Gosford to Glasgow: thousands of duplicate images embedded across development application files, heritage documentation and urban renewal submissions that slow assessment times and inflate digital storage costs. The council confirmed in its 2025–26 Digital Services review that it is auditing its document management systems as part of a broader data hygiene push tied to the Gosford City Centre Revitalisation Program.

The timing matters. Gosford's CBD is mid-transformation. The Leagues Club Field precinct off Georgiana Terrace, the emerging residential towers along Mann Street, and the continued redevelopment pressure around the Gosford train station corridor have generated an estimated surge in planning lodgements over the past three years. Each project arrives with its own image libraries — renders, site photos, heritage surveys — and many are submitted with the same stock aerial views or reference images attached multiple times across separate documents.

A Global Pattern With Local Consequences

Cities rebuilding their cores are particularly exposed to this issue. In Manchester, the Greater Manchester Combined Authority flagged in its 2024 Digital Planning Transition Report that duplicate media files accounted for a measurable share of storage overhead in its planning portal — a problem it traced to applicants copy-pasting template documents. Auckland Council, restructured after its own period of amalgamation comparable to Central Coast's 2016 merger of the former Gosford City Council and Wyong Shire Council, invested in automated deduplication tools across its resource consent system starting in 2023. The Dutch municipality of Eindhoven went further, embedding image-hash checking directly into its online submission gateway, cutting redundant file uploads by a reported 34 per cent within 12 months, according to the municipality's 2024 annual digital infrastructure report.

Central Coast Council is not yet at that stage. The council emerged from NSW Government administration in April 2021 after a financial crisis that saw it accumulate a debt of around $565 million. Rebuilding core financial and digital infrastructure since then has been incremental. Its current content management system, based on the Objective ECM platform used across several NSW councils, does not automatically flag duplicate image attachments at the point of lodgement.

What Gosford Can Learn From Comparable Rebuilds

The practical consequences are concrete. Planning officers at the council's Gosford administrative hub on Wyong Road, Gosford, must manually review image-heavy DA files, and when multiple copies of the same render or site photograph appear across a single application, it adds time to what is already a stretched assessment pipeline. Central Coast has a declared target under its Community Strategic Plan of reducing median DA determination times, a goal that remains under pressure given current housing demand from Sydney commuters priced out of the metropolitan market.

Woy Woy and Terrigal have both seen increased medium-density activity, with planning files for those suburbs among the heaviest in image volume, according to publicly available DA registers on the council's website. Community groups including the Central Coast Community Environment Network have also submitted image-rich objection documents to heritage-sensitive applications, compounding the duplication problem from the public side of lodgements.

The comparison with Auckland is instructive on cost grounds. Auckland Council reported in its 2023–24 Annual Report that digital storage rationalisation, of which deduplication formed one component, delivered operational savings that were redirected to frontline consenting staff. Central Coast, with a general fund still under fiscal repair, has more immediate incentive than most to chase similar efficiencies.

Council's digital audit is expected to report internally by the end of September 2026, with any recommended system upgrades likely to feed into the 2027–28 budget cycle. Applicants lodging through the NSW Planning Portal — the state-mandated gateway for most residential and commercial applications — may eventually see guidance updates discouraging repeated image attachments. In the meantime, planning consultants working on Gosford CBD projects say the most practical step is simple: submit one master image schedule, referenced consistently across all documents, rather than embedding the same photographs into every individual report.