Barcelona's Digital Archive Push Puts Duplicate Image Problem Centre Stage: What Officials, Experts and Key Figures Are Saying

Barcelona's municipal digital services are sitting on a problem nobody budgeted for. Thousands of duplicate images — property photos, heritage site records, tourist licensing files — are clogging the city's public-facing platforms and internal databases, slowing systems and, in at least one documented case, showing the wrong building facade on an official permit application. The Ajuntament de Barcelona acknowledged the scale of the backlog in a technical review circulated to councillors in late June 2026, describing it as a structural flaw that predates the current administration.

The timing matters. Mayor Jaume Collboni has staked significant political capital on expanding the city's digital infrastructure as part of the Barcelona Digital City programme, a strategy that underpins everything from the short-term rental crackdown in Eixample and Gràcia to the revamped tourist tax collection system introduced in April 2026. When the underlying image architecture is cluttered with redundant files, the credibility of those enforcement tools takes a hit — at least in the eyes of the operators and landlords being regulated.

What the Experts Are Saying

Urban data specialists at the Institut Municipal d'Informàtica, the city's in-house technology body based on Carrer de Tànger in the 22@ district, have been working since January on a deduplication protocol using hash-comparison software. The institute has not put a final cost figure on the project publicly, but technical documentation reviewed by The Daily Barcelona describes a phased rollout across three municipal databases, with the first phase covering the housing licence registry expected to close before September 2026.

Researchers at the Universitat Politècnica de Catalunya's BarcelonaTech campus on Carrer de Jordi Girona have studied similar problems in European municipal systems. Their 2025 working paper on smart-city data governance — which examined case studies from Amsterdam and Lisbon — found that unresolved duplicate image records increased citizen query resolution times by an average of 23 percent in mid-sized urban administrations. The paper did not specifically name Barcelona, but the methodology has been cited by IMI staff in internal presentations.

Operators in the short-term rental sector have their own grievances. The Federació d'Apartaments Turístics de Catalunya, which represents licensed holiday flat owners across the metropolitan area, has pointed to specific upload errors in the city's HUT (habitatge d'ús turístic) portal, where a duplicated property image from one listing appeared attached to a separate owner's compliance file. The federation has not disclosed how many of its members were affected, but it formally raised the issue with the city's tourism directorate in March 2026.

The Practical Stakes for Residents and Businesses

The duplicate image problem is not purely bureaucratic. For landlords in Poble Sec and Sant Antoni — two neighbourhoods under intensified short-term rental scrutiny following the city's December 2025 moratorium on new HUT licences — an image error on a compliance file can trigger an inspection or delay a licence renewal by weeks. That translates directly into lost rental income. The current daily rate for a compliant two-bedroom tourist apartment in those areas runs between €180 and €260, according to listings data from the Idealista platform compiled in June 2026.

Critics within the Consell de Cent political sphere argue the city should have commissioned a full data audit before expanding the digital enforcement perimeter. Supporters of the Collboni administration counter that the deduplication work is already under way and that the programme timeline was always going to involve iterative fixes. Neither side disputes that the problem is real.

The IMI has signalled it will publish interim results from the first deduplication phase in early autumn. Landlords and platform operators with active files in the HUT registry have been advised to log into the portal before 31 August 2026 and manually verify that uploaded property images correspond to their correct address — a step that takes under five minutes but that many licence holders have not yet completed. City hall says targeted email reminders will go out in the third week of July.