The Numbers Driving Central Coast Council's Push to Fix Its Digital Property Image Problem

Central Coast Council has identified hundreds of duplicate images embedded across its online development application portal, a problem that planning staff say is distorting property record searches and slowing assessment times for homeowners and developers trying to lodge or track DAs through the system.

The issue matters right now because the Council — still rebuilding systems and public trust after emerging from state administration in 2021 — is mid-way through digitising its legacy planning records as part of the broader Gosford CBD renewal agenda. Accurate, clean property data underpins everything from heritage overlays on Mann Street to flood risk mapping in Tuggerah and Warnervale. Getting the image library wrong means planners are cross-referencing the wrong site photos, slowing decisions that already carry long wait times.

What the data actually shows

An internal audit completed in the first half of 2026 found more than 400 duplicate image entries sitting inside the Council's property information management system, according to a Council agenda document published ahead of its June ordinary meeting. Of those, roughly 60 per cent were linked to residential parcels in the Gosford and Wyong local government areas — the two legacy councils that merged in May 2016 — where records were migrated from two separate systems that used different file-naming conventions. The migration left behind duplicate GIS-tagged photographs, some showing the wrong property entirely.

The practical cost is measurable. Planning staff logged an average of 14 additional minutes per affected DA file spent verifying image provenance before assessment could proceed, according to figures cited in the same agenda document. Across an estimated 290 affected active applications in the first quarter of 2026, that adds up to roughly 68 staff hours lost — time that Central Coast Council, which has been operating under tight fiscal constraints since the administration period, cannot easily absorb.

The Council's geographic information services team, based at the Gosford administration building on Mann Street, began a staged replacement program in April 2026. The first phase targeted 120 high-priority parcels in the Gosford CBD precinct, where development activity is concentrated around the planned activation of the Gosford City Centre Master Plan corridor running from Donnison Street down to the waterfront.

Why this hits harder on the Central Coast

The region's specific geography makes clean imagery more critical than it might be elsewhere. Properties along Tuggerah Lake's western foreshore, around The Entrance and Toukley, carry flood overlays tied directly to aerial and ground-level site photos. If a duplicate image from a different parcel is attached to a flood-affected site file, assessors risk working from a photo that doesn't reflect actual inundation risk. That exposure became sharper after the 2022 flooding events that affected parts of Tacoma and Chittaway Bay.

Housing affordability pressures compound the urgency. The Central Coast remains one of the most active relocation destinations for Sydney commuters priced out of the metropolitan market, with CoreLogic data from early 2026 showing median house prices in Gosford sitting around $870,000 — well below Sydney's median but rising. More DAs means more pressure on processing systems. Duplicate images are not a cosmetic inconvenience; they are a bottleneck in a pipeline that already struggles to keep pace with demand.

The replacement program is scheduled to clear all flagged duplicates by the end of September 2026, with a secondary audit of rural zoned parcels — particularly those around the Rural Land Strategy areas near Mangrove Mountain and Somersby — to follow in the October-to-December quarter. Residents or developers with active applications can request a manual image verification check through the Council's customer service centre on Hely Street, Wyong, or via the NSW Planning Portal, referencing their DA number. Council has flagged that any application where a duplicate image is confirmed will not incur additional lodgement or amendment fees as a result of the correction.