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Rent Cap Calculator

Check if your rent complies with legal caps in regulated areas. Calculation based on 2025 reference rents and decree n°2024-1039.

Understanding rent control

Rent control is a system established by the ALUR law of 2014 and strengthened in 2024 to fight against excessive rents in regulated areas. It aims to protect tenants by capping rents at re-letting and first rental.

How does the calculation work?

The calculation is based on three main elements:

  • •The median reference rent of the area (published by local rent observatories)
  • •The construction period of the property
  • •The rental type (unfurnished or furnished)

The landlord can apply a maximum increase of 20% above the reference rent, except for justified rent supplements.

Areas and cities covered by the calculator

This calculator integrates official data from local rent observatories for the following territories:

Paris

  • • 14 secteurs DRIHL
  • • Encadrement depuis juillet 2019
  • • Observatoire OLAP

Lille

  • • 5 secteurs DDTM59
  • • Encadrement depuis mars 2020
  • • Observatoire des loyers MEL

Lyon & Villeurbanne

  • • 233 zones IRIS
  • • Encadrement depuis novembre 2021
  • • Observatoire local des loyers

Bordeaux

  • • 88 zones IRIS, 4 secteurs
  • • Encadrement depuis juillet 2024
  • • Maisons & Appartements
  • • Observatoire local

Montpellier

  • • 88 zones IRIS
  • • Encadrement depuis juillet 2022
  • • 5 zones tarifaires
  • • Observatoire local

Est Ensemble (93)

  • • 9 communes (~420k hab.)
  • • 6 secteurs DRIHL
  • • Encadrement depuis décembre 2021
  • • Maisons & Appartements

Plaine Commune (93)

  • • 9 communes (~430k hab.)
  • • 8 secteurs DRIHL
  • • Encadrement depuis juin 2025
  • • Maisons & Appartements

Grenoble-Alpes Métropole

  • • 90 zones IRIS, 3 zones
  • • Encadrement depuis janvier 2026
  • • 20 communes encadrées
  • • Observatoire local

Pays Basque

  • • 24 communes, 79 zones IRIS
  • • 3 zones d'encadrement
  • • Encadrement depuis novembre 2024
  • • Maisons & Appartements

Data is updated regularly according to publications from local observatories. Other territories will be added gradually.

Special cases

Rent supplement

Possible if the property has exceptional characteristics (remarkable view, luxury equipment, etc.). Must be justified and mentioned in the lease.

Social housing

Not covered by rent control, subject to specific rules.

Shared accommodation

Rent control applies to the total rent of the property, then divided among the roommates.

Rent controlReference rentRegulated areaRent capALUR lawMaximum allowed rent

Frequently asked questions

What is rent control?▼
Rent control is a system that limits the amount of rent a landlord can charge in certain regulated areas. The rent cannot exceed the reference rent increased by 20%.
Which cities are covered by rent control in 2025?▼
Nine areas are currently covered: Paris (since July 2019), Lille (since March 2020), Lyon and Villeurbanne (since November 2021), Bordeaux (since July 2024), Montpellier (since July 2022), Grenoble-Alpes Métropole (since January 2026), Est Ensemble - 93 (since December 2021), Plaine Commune - 93 (since June 2025), and Pays Basque - 24 municipalities (since November 2024).
How is the reference rent calculated?▼
The reference rent is calculated by local rent observatories based on median rents observed in the area. It varies according to the construction period of the property, its precise location, and whether it is an unfurnished or furnished rental.
What are the risks for a landlord who exceeds the rent cap?▼
A landlord who exceeds the legal cap faces a fine of up to €5,000 for an individual (€15,000 for a legal entity), reimbursement of the excess to the tenant, and legal action by the tenant possible for 3 years.
What is a rent supplement?▼
A rent supplement is an additional amount that can be requested if the property has exceptional location or comfort characteristics compared to properties in the same category. It must be justified in the lease and cannot exceed the increased reference rent.
Are reference rents updated regularly?▼
Yes, reference rents are updated annually on July 1st by local rent observatories. It is important to check the most recent data for your area.

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Warning: The simulations presented on this site are provided for informational purposes only and do not constitute investment advice, a credit offer, or a recommendation to buy or sell. The results displayed are estimates based on the data provided and do not guarantee future performance. Any real estate investment decision should be made after consulting qualified professionals (notary, financial advisor, accountant, tax lawyer). The publisher disclaims any responsibility for decisions made based on these simulations.
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