Requirement to Publish Rent Index and Cap for Rentals in Catalonia

The Generalitat de Catalunya has formalised the legal requirement to include the official reference price index and the applicable maximum limit in all advertisements for long-term residential rentals. The measure, approved via Decree-Law 1/2025 on urgent rent containment measures and ratified by the Parlament through Resolution 108/XV, amends Law 18/2007 on the right to housing to enhance transparency in designated 'stressed' residential market areas.

What's Changing

Any advertising medium —including property portals, agency websites, shop window displays, or direct private listings— must mandatorily include specific technical and legal data before accepting enquiries from interested parties:

• The Official Reference Index: the estimated price resulting from the state reference system (SERPAVI) of the Ministry of Housing and Urban Agenda must be recorded.
• Previous Contract Rent: if the property has been rented as a long-term residence in the last five years, it is mandatory to show the amount of the last formalised monthly payment.
• Visible Legal Cap: if the amount published in the offer differs from or exceeds the regulatory limit assigned to the property, the advertisement must explicitly display the maximum permitted rent for the tenant's reference.
• Landlord Status: it must be explicitly stated whether the property belongs to a large landlord or not.

Who is Affected

The regulations apply to private owners who choose to advertise a flat themselves, as well as to real estate agencies, property managers, and digital intermediation platforms. There is no distinction based on the volume of the property portfolio when preparing the advertisement.

The territorial scope covers the 271 Catalan municipalities formally declared as Stressed Residential Market Areas (ZMRT) through resolutions TER/800/2024 and TER/2408/2024 of the Department of Territory, Housing and Ecological Transition. This perimeter encompasses more than 7 million residents (over 90% of the community's population). In other localities not declared as stressed, advertising and pricing remain under the regime of free agreement between the parties.

What it Means if You Own a Property in Catalonia

In regions such as Vallès Occidental, Vallès Oriental, and Barcelonès, almost all major towns are within the designated 'stressed' market area. Localities such as Sabadell, Terrassa, Granollers, or Caldes de Montbui require documentation of the property's limit prior to publication.

To understand the operation, let's look at an illustrative example: a flat in Terrassa that was rented until 2024 for 750 € per month by a private owner who is not a large landlord. If the property owner wished to advertise it now for 850 €/month, calculating for ordinary improvements, the advertisement must mandatorily show 750 € as the previous legal rent limit, along with the range indicated by the official index. Publishing only the desired figure without the regulatory breakdown exposes the advertiser to administrative inspection.

What to Do Now

1. Locate the Last Contract: if the property was rented in the last five years, review the deposit lodged with INCASÒL and the final rent with its updates to document the exact legal basis.
2. Consult the State Index: enter the cadastral reference, usable surface area, year of construction, and state of conservation into the index system portal to obtain the official report.
3. Review the Portal Listing: verify that the property platform or shop window listing includes the specific fields for the index, the maximum legal cap, and an indication of whether or not you are a large landlord.
4. Consult a Registered Manager: in case of calculation discrepancies between rehabilitation works and legal extensions, cross-check the figures with a professional to avoid consumer sanctioning procedures.