How Johannesburg's Public Records Ended Up Full of Duplicate Images — and What It's Costing the City

The City of Johannesburg's Property Valuation Directorate has been quietly working through a backlog of duplicate image files embedded in the city's General Valuation Roll — a problem that, municipal sources say, dates back to at least the 2018 GV cycle and has compounded with every database migration since. The issue is not a minor housekeeping matter. Duplicate images attached to property records have contributed to billing disputes across suburbs from Randburg to Tembisa, where multiple photographs of the same erf have been filed under different property IDs, creating conflicting valuations that ratepayers then have to contest through the City's Valuation Appeals Board.

The timing matters because Johannesburg is mid-cycle on the 2025 General Valuation, with objection windows for commercial properties in Sandton's central business node — particularly along Rivonia Road and Maude Street — closing in the third quarter of this year. Any image data attached to those valuations that carries duplicate or mismatched files could trigger a fresh wave of appeals at a time when the city's appeals infrastructure is already under strain from the previous cycle's unresolved cases.

How the Problem Accumulated

The roots of the duplicate image problem stretch back to the early 2010s, when the City of Johannesburg Metropolitan Municipality began digitising physical property files held at the Civic Centre on Braamfontein's Loveday Street. The digitisation drive was outsourced in phases to different contractors, and no single image-naming convention was enforced across the project. A file photographed in 2012 might share a filename with a re-scan done in 2016, and both versions would be ingested into the same database row without automated deduplication checks.

When the city migrated its property data onto the SAP-based Integrated Revenue Management System — a rollout that stretched painfully across the mid-2010s — those duplicates travelled with it. Each migration added a layer. By the time the Joburg Property Company and the Rates and Taxes division were drawing from the same underlying dataset, a single commercial property in Rosebank could have four or five image records, at least two of which were pixel-for-pixel identical, consuming server storage and, more importantly, confusing the automated matching algorithms that link photographs to legal property descriptions.

The Gauteng Department of e-Government flagged data quality failures in a 2022 provincial audit of local government ICT systems, noting that image deduplication was among the lowest-priority tasks in municipal IT maintenance schedules. That audit covered all six Gauteng metros and district municipalities. The precise number of duplicate image files across Johannesburg's property and infrastructure databases has not been publicly released, but IT procurement documents tabled at the City's Finance Portfolio Committee in February 2024 referenced a deduplication exercise covering more than 1.4 million scanned records held in the city's document management environment.

What Gets Fixed — and What Comes Next

The City has since brought in a phased remediation programme, with the first tranche focused on high-value commercial zones in Sandton and the Waterfall City precinct along Allandale Road in Midrand, where valuation accuracy directly affects rates income. Residential records in townships including Soweto's Meadowlands and Orange Farm further south on the R82 corridor are scheduled for a second tranche, though no confirmed completion date has been communicated to ward councillors in those areas.

For ordinary ratepayers, the practical advice from the City's Revenue Management office on Jorissen Street in Braamfontein is straightforward: if a property owner receives a supplementary valuation notice that references photographic evidence, they have the right to request the specific image files used under the Promotion of Access to Information Act. Any discrepancy between the image on file and the actual property — whether because a duplicate from a neighbouring erf was wrongly attached or because the photograph predates a structural change — forms valid grounds for a formal objection. The Valuation Appeals Board has a walk-in service point at the Metro Centre in Roodepoort, and objections can also be lodged electronically through the city's e-Services portal. The window is narrow. Property owners who ignore the issue now may find themselves carrying inflated rates bills well into the 2027 financial year.