Rent control: New urban areas affected in summer 2026

Rent control in summer 2026: A decisive turning point for the property market

Summer 2026 marks a crucial milestone in the French property landscape. With the housing crisis persisting in many metropolitan areas, public authorities have decided to toughen their stance to protect the purchasing power of tenants whilst regulating the market. At Roomlala, we support thousands of hosts and tenants every day with their homestay and shared housing rental processes. We know how complex, and even daunting, legislation can sometimes seem for a host simply wanting to earn an income from an empty room, or for a student tenant looking for an affordable roof over their head. That is why we have broken down the very latest legal developments concerning rent control for you—a measure that is expanding significantly this year.

First and foremost, it is essential to understand what we are talking about. Rent control is a measure that sets a maximum ceiling per square metre for the rents of properties let unfurnished or furnished, whether as a primary residence or via a mobility lease. It is fundamental not to confuse this measure with the cap on rent increases upon re-letting, nor with the annual revision based on the Rent Reference Index (IRL). Rent control acts as an absolute shield: regardless of the property's history, the rent excluding charges cannot mathematically exceed a certain threshold, known as the increased reference rent. This threshold corresponds to the median rent of the geographical area, increased by 20%, and it is updated annually by prefectural decree.

For hosts and tenants, this regulation requires constant vigilance. A landlord who ignores these rules faces severe penalties, while an ill-informed tenant could pay hundreds of euros too much every year. At Roomlala, our mission is to offer you a secure and transparent framework. In this article, we will explore in detail the new high-demand areas applying this measure from summer 2026, the direct and often overlooked impact of these rules on shared housing, and the best practices for letting with complete peace of mind and in full compliance with the law.

The 3DS law and the crucial deadline of 23 November 2026

To fully grasp what is at stake this summer 2026, we must dive into the legislation for a moment. Rent control, as we know it today, is technically an experiment. Introduced by the ELAN law, this measure has been extended and governed by the law on differentiation, decentralisation, deconcentration and various measures to simplify local public action, better known as the 3DS law. This legislation set a very specific deadline: the experiment is in force until 23 November 2026. On that date, if no new legislative extension is voted on by Parliament, the measure will end.

This date of 23 November 2026 creates a particularly intense transition period. Municipalities that have recently obtained authorisation to apply rent control must act quickly to implement their prefectural decrees and local rent observatories. For landlords, this means quickly adapting to new rules that could, theoretically, disappear or be made permanent at the end of the year. At Roomlala, we advise you to always work on the assumption that the rule in force at the time of signing the lease applies, and to never bet on a potential future cancellation of the law to justify an excessive rent.

It is also important to note that this law imposes total transparency. The rental lease must state the reference rent and the increased reference rent applicable to the property. If these details are missing, the tenant is entitled to serve formal notice on the landlord to include them and may even request a rent reduction if it exceeds the legal ceiling. This is a powerful protection that requires landlords to be perfectly informed of the amounts applicable in their street or neighbourhood.

The new urban areas under rent control in summer 2026

Until now, rent control was mainly associated with Paris, Lille, Lyon, Villeurbanne, Montpellier, Bordeaux and a few municipalities in the Paris region such as those of Est Ensemble or Plaine Commune. But in summer 2026, the rent control map is expanding considerably. New urban areas are joining the scheme to respond to a surge in property prices that is stifling the middle class and students. Among these new entrants, we find very varied geographical sectors, demonstrating that housing tension is no longer the preserve of the capital alone.

Here are the main urban areas that are applying or actively preparing to apply rent control for this summer 2026:

• Marseille: The Phocaean city, which has seen its rents explode in recent years due to its growing attractiveness and the proliferation of short-term tourist rentals, is introducing a strict cap, particularly in its central and coastal districts.
• Annemasse Agglo: Located on the French-Swiss border, this area is bearing the full brunt of the pressure on the purchasing power of cross-border workers. Rent control here aims to allow local workers to continue to be housed in their own territory.
• Cergy: A major student hub in the Île-de-France region, Cergy is adopting the measure to protect its large university population against abuse, particularly in the sector of small surface areas and shared housing.
• Grand-Orly Seine Bièvre: This vast Parisian territory is joining other public territorial establishments (EPT) in the Paris suburbs to harmonise rent regulation at the gates of Paris.

For landlords located in these new areas, now is not the time for approximation. The exact dates of entry into force and the precise breakdown of geographical sectors vary according to local prefectural decrees. A flat located on one side of a street may have a different reference rent to one located on the pavement opposite. It is therefore imperative to consult the local simulators set up by the prefectures or to contact the National Housing Information Agency (ANIL) to obtain the exact amount applicable to your property.

The direct impact of rent control on shared housing and homestays

Shared housing and homestays are extremely popular accommodation solutions on Roomlala. They allow for building social ties, sharing costs and optimising available space. However, a persistent misconception suggests that renting by the room allows one to bypass rent control by multiplying small leases. This is completely false. The legislator has provided very strict rules to ensure that shared housing does not become a legal loophole allowing one to escape the capping.

The golden rule is simple but relentless: for shared housing, the total sum of rents paid by all tenants together cannot in any case exceed the legal ceiling applicable to the entire property. In other words, if you own an 80 m² flat with an increased reference rent of 1,200 euros, you cannot rent out four rooms at 400 euros each (which would total 1,600 euros). The cumulative amount of rent excluding charges received by the landlord must imperatively remain less than or equal to 1,200 euros. This rule applies strictly, whether the property is let unfurnished or furnished.

At Roomlala, we ensure that our users understand this mechanism to avoid any disputes. As a landlord, you must calculate the total living area of your property, determine the maximum authorised rent for this overall surface, then divide this amount between the different tenants. This division does not have to be equal: it can be done pro rata according to the size of each person's private room. The essential thing is that the final total respects the legal framework.

The case of the single shared housing lease

In the case of a single lease, all tenants sign the same rental contract. They are generally bound by a joint-and-several liability clause, which means they are responsible together for paying the full rent. In this configuration, the application of rent control is relatively simple to verify. The global rent indicated on the single lease is compared directly to the increased reference rent calculated for the total surface area of the flat or house.

Let's take a concrete example in Cergy, a new area concerned in summer 2026. You rent a 75 m² furnished flat to three students via a single lease. The prefectural decree sets the increased reference rent for this type of property, in this specific neighbourhood, at 18 euros per square metre. The legal ceiling for your flat is therefore 1,350 euros (75 x 18). The global rent written on the single lease cannot exceed 1,350 euros excluding charges. If the students decide to divide this rent into three parts of 450 euros, that is their internal choice, but vis-à-vis the law, it is the global amount of the lease that counts and that respects the capping.

It is important to specify that rental charges (water, electricity, maintenance of communal areas, internet) are not included in this ceiling. They must be invoiced separately, either at cost with an annual adjustment, or in the form of a fixed fee (very common in furnished shared housing). However, the fixed fee for charges must not be manifestly disproportionate to the actual charges, at the risk of being reclassified as a hidden rent supplement by a judge.

The case of individual room leases

The situation becomes a little more complex, but just as regulated, when the landlord chooses to sign individual leases with each tenant. This practice is very common for homestays on Roomlala, as it offers more flexibility: each tenant is independent, there is no joint-and-several liability clause, and departures or arrivals are managed individually. Each contract covers the exclusive use of a specific room and the shared use of communal areas (kitchen, living room, bathroom).

However, the law is formal: the sum of the rents of all current individual leases for the same property must not exceed the ceiling applicable to the entire property. If we return to our example of the 75 m² flat in Cergy with a global ceiling of 1,350 euros. The landlord rents three rooms of different sizes. They could set the rent for the large room at 500 euros, the medium one at 450 euros and the small one at 400 euros. The sum is 1,350 euros, the ceiling is respected.

A major point of vigilance for hosts: if you rent a single room in your own primary residence (classic homestay), the rent for this room must theoretically respect the ceiling calculated on the surface area of the room rented, plus a share of the communal areas. This is a calculation that can prove tedious. We strongly recommend using the ANIL simulators to assess the weighted surface area and determine the fair and legal rent for the room you are offering on Roomlala.

Rent supplement: A strictly regulated exception

Faced with the rigour of rent control, the law has provided a safety valve: the rent supplement. This mechanism allows a landlord to set a rent higher than the increased reference rent. However, beware of false beliefs! This supplement is by no means an automatic right and is subject to extremely strict conditions, which are also increasingly monitored by the authorities and challenged by tenants.

For a rent supplement to be legal, the property must present objectively exceptional location or comfort characteristics. These characteristics must meet several cumulative criteria: they must not have already been taken into account for the determination of the reference rent (which already takes into account the construction era, number of rooms and the type of rental, unfurnished/furnished), they must be decisive for setting the rent compared to properties of the same category in the same geographical sector, and they must not give rise to recovery in respect of charges.

It is vital to understand what does NOT justify a rent supplement. A kitchen recently renovated to new, the installation of fibre optic, the presence of a simple balcony facing the street, good quality furniture or a double aspect are considered as normal comfort elements or already valued by the classic market. Furthermore, since the 2022 Purchasing Power Act, it is formally forbidden to apply a rent supplement if the property has certain defects: sanitary facilities on the landing, signs of damp, draughty windows, lack of adequate heating, or if it is classified as an energy-inefficient property (DPE F or G).

So, what actually justifies a supplement? Let's take valid concrete examples. A flat in Marseille with an immense private 40 m² terrace offering a panoramic and unobstructed view of the Vieux-Port and the Notre-Dame de la Garde basilica possesses an exceptional location characteristic. A property equipped with extraordinary luxury fittings, such as an integrated private sauna or a large private garden in the heart of a very dense area like the Grand-Orly Seine Bièvre, can also justify such a supplement. If you apply a supplement, its amount and precise justification must be included in the lease, and the tenant has three months to challenge it.

Landlords and tenants: Your obligations, your rights and the penalties

Non-compliance with rent control is no longer taken lightly by public authorities. Municipalities joining the scheme in summer 2026, such as Annemasse or Cergy, are setting up dedicated teams to spot illegal listings and process reports from tenants. At Roomlala, we wish to inform our hosts of the risks involved, because our goal is to promote accommodation that is trustworthy, sustainable and respectful of the law.

Landlords who exceed the legal ceiling without valid justification (or with a rent supplement deemed abusive) face very deterrent financial penalties. If an infringement is noted, the prefect serves the landlord with formal notice to bring the lease into compliance within two months and to reimburse the overpayment to the tenant. If the landlord refuses to comply, they face an administrative fine of up to 5,000 euros for a natural person (an individual) and up to 15,000 euros for a legal entity (such as a property investment company). Furthermore, the tenant can take legal action to obtain a rent reduction and the retroactive reimbursement of sums paid in excess, and this throughout the duration of the lease.

For tenants, including those in shared housing or homestays, the challenge process has been simplified. If you notice that your rent exceeds the legal ceiling applicable in your city, you can apply to the Departmental Conciliation Commission (CDC) for free. This joint body will attempt to find an amicable agreement with the landlord to lower the rent. In case of failure of the conciliation, the protection litigation judge can be seized. It is therefore essential for tenants to verify the amount of the reference rent as soon as they start looking for accommodation, by using the official tools.

In conclusion, the extension of rent control in summer 2026 is an unavoidable reality that is profoundly changing rental practices in many new urban areas. Whether you are a landlord looking to rent out a room in good faith or a student joining a shared flat in Marseille or Cergy, information is your best ally. At Roomlala, we strongly encourage you to consult official sites such as those of the ANIL or the public service to learn about the prefectural decrees in your sector. By respecting these rules, you not only guarantee the legality of your lease, but you also contribute to a fairer and more transparent housing market, values that are at the heart of the Roomlala spirit.