Berlin's Duplicate Image Problem: The Numbers Exposing a Hidden Drain on City Digital Projects

Roughly 34 percent of all images stored across Berlin's municipally managed digital platforms are exact or near-exact duplicates, according to an internal audit completed in May 2026 by the Technologiestiftung Berlin, the city's publicly funded technology foundation based in Grunewaldstraße. The finding has quietly unsettled procurement officers and IT managers at several Senatsverwaltungen, particularly those running housing and transport portals that have ballooned in scope since 2022.

The timing matters. Berlin's SPD-led coalition has staked significant political capital on digitising city services by the end of this legislative term, and the housing portal IBB.de — run by Investitionsbank Berlin — is central to that push. Every redundant image file is not just wasted server space; it slows page load times, inflates cloud storage contracts, and undermines the accessibility compliance the city is legally required to meet under the European Accessibility Act, which came into full force in June 2025.

What the Data Actually Shows

The Technologiestiftung audit examined roughly 2.3 million image assets across 14 city-managed web properties. Of those, just under 800,000 were flagged as duplicates — defined as files sharing identical pixel content but uploaded under different filenames or into different content management folders. A further 120,000 were classified as near-duplicates: images cropped or resized from a common original but stored separately, often because individual departments lack shared asset libraries.

Storage costs are concrete. Berlin's central IT service provider ITDZ Berlin currently pays for approximately 4.8 petabytes of cloud-adjacent storage across city operations. Analysts at the Technologiestiftung estimate that eliminating confirmed duplicate image files alone could reduce active storage demand by 9 to 12 percent — a figure that translates into potential annual savings in the low seven-figure euro range, though the foundation has not published a precise monetary figure publicly.

The problem is particularly acute at BVG, the city's public transport operator. BVG's digital team, headquartered near Holzmarktstraße in Mitte, has been expanding its real-time route visualisation tools since the launch of the Jelbi mobility platform. Multiple teams working in parallel uploaded route map graphics and vehicle imagery independently, creating overlapping libraries across at least three internal content systems. A BVG spokesperson confirmed in June 2026 that a consolidation project is underway but declined to give a completion date.

How Berlin Stacks Up — and What Comes Next

Berlin is not alone in confronting this. Hamburg's Dataport agency published a comparable self-assessment in 2024, finding duplicate rates of around 28 percent in state digital archives. London's Government Digital Service flagged the issue as early as 2021. What sets Berlin apart is the sheer volume of assets generated since the city accelerated its digitalisation push following the Koalitionsvertrag signed in January 2023, which committed over €700 million to smart city infrastructure through 2027.

Startup accelerators in Mitte and Prenzlauer Berg have begun selling automated deduplication tools specifically marketed to Verwaltung clients. One such company, operating out of the Factory Berlin campus on Rheinsberger Straße in Wedding, launched a German-language API product in March 2026 targeting exactly this segment — municipal content management systems running on outdated TYPO3 or Drupal backends.

For Berliners navigating the city's housing shortage, the practical stakes are real. Duplicate and broken images on rental listing platforms cause listings to fail accessibility checks, which means some residents using screen readers — estimated at around 1.4 percent of the city's 3.7 million population — cannot properly access housing information that the city is legally obligated to provide equally. That compliance gap has already drawn attention from the Landesbeauftragte für Datenschutz und Informationsfreiheit.

The Technologiestiftung is expected to publish its full audit report in September 2026, with recommendations for a centralised Digital Asset Management system shared across Senatsverwaltungen. Whether the coalition moves quickly on procurement will depend heavily on the supplementary budget negotiations expected in autumn — the same fiscal window where the rent cap debate is likely to dominate headlines and political bandwidth.