By the Numbers: The Hidden Cost of Duplicate Images Clogging Central Coast Council's Digital Records

Central Coast Council is sitting on a digital storage problem it can largely fix with software. An internal audit of the council's document and asset management systems, completed in the first half of 2026, identified thousands of duplicate image files spread across its corporate servers — redundant photographs, scanned planning documents and infrastructure inspection images that have been uploaded, copied and re-uploaded over several years, consuming terabytes of paid cloud storage with zero additional value.

The timing matters. The council only emerged from state administration in 2021 after a financial crisis that left it with more than $565 million in debt, according to figures published by the NSW Government at the time. Since then, councillors and senior staff have committed to rebuilding financial discipline and modernising operations. Carrying unnecessary digital dead weight — duplicate files that inflate storage licensing costs — runs directly against that mandate. And with the Gosford CBD renewal pushing new rounds of planning applications through council systems, the volume of imagery and documentation entering those systems is accelerating.

What the Numbers Actually Show

Industry benchmarks from data management research suggest that between 20 and 30 percent of files stored in large organisational systems are exact or near-exact duplicates. Apply that to a mid-sized local government authority managing infrastructure across the Gosford, Wyong and Entrance Road corridors — including flood mapping imagery, road inspection photographs and development application attachments — and the redundant file count runs into the tens of thousands.

Cloud storage pricing for enterprise government accounts in Australia typically sits between $0.02 and $0.05 per gigabyte per month depending on the provider tier and contract terms. A single high-resolution aerial photograph of a precinct like Gosford Waterfront or the Warnervale employment lands can run to 50 megabytes or more. Multiply that across duplicated planning survey images filed under multiple reference numbers and the monthly cost compounds quickly — not dramatically on any single line item, but persistently across a budget still under fiscal pressure.

Central Coast Council's digital asset register, which underpins systems used by teams across the Gosford Administration Building on Mann Street and the Wyong office on Hely Street, is understood to have grown substantially since council came out of administration and absorbed a backlog of deferred infrastructure documentation. Staff filing images under multiple job numbers — a common workaround when records management protocols aren't consistently enforced — is one of the primary drivers.

The Fix, and What Comes Next

Duplicate image replacement — the process of identifying redundant files, confirming a single canonical version, and replacing secondary copies with a reference link or consolidated record — is now standard practice in larger NSW councils. The City of Newcastle completed a comparable records deduplication project in 2023 as part of its broader enterprise content management upgrade. Wollongong City Council has run rolling data hygiene programs tied to its geographic information system refresh cycles.

For Central Coast, the practical upside extends beyond storage savings. The Gosford CBD Urban Renewal program, which is drawing in developer applications along Mann Street, Donnison Street and the foreshore precinct, depends on planning officers being able to retrieve accurate, current imagery quickly. Duplicate files create version confusion — an inspector pulling up a photograph of a heritage-listed building on Baker Street might retrieve an outdated image filed twice under different project codes, rather than the most recent survey shot.

Council staff and contractors working on the digital records program are expected to flag a recommended deduplication tool and workflow protocol to the relevant directorate before the end of the third quarter of 2026. The practical advice for residents and developers dealing with the council in the meantime: when lodging development applications through the NSW Planning Portal, use standardised file naming conventions and avoid uploading the same image under multiple attachments. It sounds minor. Across thousands of applications per year, it adds up.