Barcelona's Short-Term Rental Crackdown Is Creating a Duplicate Image Problem — and the Numbers Are Stark

Barcelona's housing enforcement machine is churning out removal orders faster than ever — but the listings keep coming back. City inspectors working under the Ajuntament de Barcelona's Habitatge department have identified a growing pattern: the same properties, often the same photographs, reappearing on short-term rental platforms within days of being delisted. It is not a glitch. It is a strategy, and it is making the official count of illegal tourist apartments look far smaller than it actually is.

The stakes are high. Mayor Jaume Collboni staked a significant part of his first term on a promise to end tourist apartment licences in the city altogether when existing permits expire — a policy with a hard deadline of November 2028. His administration has pointed to a figure of roughly 10,100 active tourist flat licences currently registered in Barcelona, a number that underpins everything from the tourist tax revenue model to the housing rental projections published by the Observatori Metropolità de l'Habitatge de Barcelona. If duplicate listings artificially inflate the apparent supply of legal and grey-market properties, those projections are built on bad data.

The Scale of the Duplication Problem

Housing analysts and platform auditors have long flagged that photo duplication — where a single property generates multiple listings under different host accounts or slightly altered addresses — can account for a measurable distortion in scraped market data. Independent research published by Inside Airbnb, which tracks Barcelona among other cities, has in previous years identified thousands of listings in the city's Eixample and Gràcia districts alone that share images or geo-coordinates with other active posts. The Eixample, which spans the grid blocks between Carrer d'Aragó and Avinguda Diagonal, remains the densest zone for short-term rental activity in the city.

The Oficina de Turisme de Catalunya does not publish a breakdown of duplicates as a share of total listings — that figure is simply not collected in any systematic, public-facing way. That gap is precisely the problem. Without a duplicate-scrubbed baseline, enforcement decisions rely on raw listing counts that overstate market size and, perversely, can make progress look slower than it is when the same address reappears under a new listing ID after a takedown.

The tourist tax, the taxa turística, provides one indirect window into the real numbers. Barcelona collected taxes on an estimated 19 million overnight tourist stays in 2024 — a figure the city has cited in budget documents — but the per-apartment granularity needed to cross-reference legal licences against active listings is not publicly reconciled. The gap between what platforms report and what Habitatge inspectors find on the ground in neighbourhoods like Sant Pere, Santa Caterina i la Ribera, or the narrow streets around the Mercat de Santa Caterina, is where duplicates live.

What the City Is Doing — and What Comes Next

The Ajuntament has expanded its algorithmic monitoring contract, working with third-party data services to flag suspicious listing clusters. The programme, which sits under the Urban Inspection Service, uses image-matching logic similar to reverse image search tools to identify properties posting the same or near-identical photographs across multiple accounts. The city has not published a success-rate figure for the tool, and as of July 2026, no formal audit report has been released to the public.

For residents in the rental market — particularly the roughly 40 percent of Barcelona households who rent rather than own, according to Idescat census data — the practical effect of duplicate listings is that housing units that should theoretically be returning to the long-term market are not doing so visibly. A flat in the Poblenou neighbourhood that loses its tourist licence on paper may remain effectively captured in the short-term economy through a reposted listing under a different name.

The path forward runs through better data architecture before the 2028 expiry deadline. Auditors recommend the city publish a quarterly, licence-matched listing registry — cross-referenced against platform data — so that the duplicate problem has a number attached to it. Without that, Barcelona's housing crackdown is fighting an opponent it cannot fully count.