How Barcelona's Housing Registry Became Ground Zero for a Duplicate-Image Crisis — and What Comes Next

Barcelona's Ajuntament confirmed this week that its unified housing licence database — the backbone of Mayor Jaume Collboni's aggressive push to eliminate illegal tourist flats — contains thousands of duplicate property images that have been mis-filed, mis-tagged or cross-attributed between distinct addresses. The problem is not trivial. Officials are treating it as a structural flaw in the city's digital cadastral records, not a minor clerical slip.

The timing is awkward. Collboni staked his first full year in office on tightening short-term rental controls, and the city's deadline for renewing Habitatge d'ús turístic licences — the formal permits required to list a flat on platforms like Airbnb or Booking.com — passed on 31 March 2026. Roughly 10,100 licences were up for renewal, according to figures published by the Ajuntament earlier this year. Processing that volume means cross-referencing property images against addresses in the registre municipal, and that is exactly where the duplicate-image problem surfaced at scale.

How the Problem Accumulated

The roots go back further than the current administration. Barcelona's property records have been digitised in waves since the early 2000s, with the Institut Municipal d'Hisenda handling fiscal data, the Cadastre office on Carrer de la Llacuna managing structural descriptions, and the housing department at Carrer de Pallars 161 — home to the 22@ district's administrative cluster — maintaining its own photographic archive. Each body built its own image library with its own file-naming conventions. When the city attempted to merge these repositories into a single platform, images tagged to one flat sometimes collided with images already filed under a neighbouring property sharing the same portal number but a different floor designation.

The Eixample district is particularly affected, for an obvious reason: the grid layout means thousands of buildings share identical external façades, and ground-floor commercial conversions since the 1990s have repeatedly changed how individual units are numbered in official documents. A flat at Carrer del Consell de Cent that was reconfigured in 2003 might carry four separate image sets across the three legacy databases, none of which were ever reconciled.

The short-term rental enforcement drive accelerated the problem's visibility. Between 2023 and 2025, the city's Agència de l'Habitatge de Catalunya — the Catalan government body that sits above the municipal layer — issued more than 1,200 sanction notifications to tourist flat operators. Each notification required photographic evidence attached to a specific licence number. Lawyers for operators began spotting cases where the photographs on file did not match the property described, and several appeals lodged at the Jutjat Contenciós Administratiu in the Ciutat de la Justícia complex on Gran Via cited the image discrepancies directly.

What the City Is Doing Now

The Ajuntament has contracted a technical audit of the housing image repository, with a completion target set for September 2026. The work involves cross-checking every image against GPS metadata, the cadastral reference number, and the physical address as it appears in the Padró Municipal d'Habitants. Where conflicts exist, field inspectors are being sent to re-photograph properties and create a clean master record.

For property owners and rental operators, the practical advice from legal specialists familiar with the registry — based on how similar rectification exercises have played out in other European cities, including Amsterdam's 2023 overhaul of its verhuurregister — is to request a certified extract of their own entry in the registre d'habitatges before submitting any new licence application or renewal. The extract, available through the Oficina de l'Habitatge at Carrer del Bisbe Laguarda 4 in the Raval neighbourhood, costs €11.80 and takes up to 15 working days. That fee and timeline have not changed since 2024, but demand for the extract has spiked since April.

The broader question is whether the audit will finish before the next enforcement cycle begins. The Ajuntament has indicated it plans a new round of inspections in Gràcia and Sant Martí in the autumn. If the image registry is not clean by then, the same legal vulnerabilities that emerged in 2025 appeals will resurface — and this time, operators' lawyers will already know exactly where to look.