Rent control: The new urban areas affected in the summer of 2026

Rent control in summer 2026: A decisive turning point for real estate

Summer 2026 marks a crucial milestone in the French real estate landscape. With the housing crisis persisting in many metropolitan areas, public authorities have decided to take a tougher stance to protect the purchasing power of tenants while 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 anxiety-inducing legislation can sometimes seem for a host who simply wants to make an empty room profitable, or for a student tenant looking for an affordable roof over their head. That is why we have broken down for you the very latest legal developments regarding rent control, a mechanism that is expanding significantly this year.

First and foremost, it is essential to clearly understand what we are talking about. Rent control is a measure that sets a maximum ceiling per square metre for rents of unfurnished or furnished dwellings, whether used as a primary residence or under a mobility lease. It is fundamental not to confuse this mechanism with the limitation 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 housing'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, plus 20%, and it is updated each year by prefectural decree.

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

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

To fully grasp the stakes of 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 mechanism was extended and regulated by the Law on Differentiation, Decentralization, Deconcentration and Various Measures for the Simplification of Local Public Action, better known as the 3DS law. This legislation set a very specific deadline: the experiment is in force until November 23, 2026. On that date, if no new legislative extension is voted on by Parliament, the mechanism will end.

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

It is also important to note that this law requires total transparency. The rental lease must mandatorily mention the reference rent and the increased reference rent applicable to the housing. If these details are missing, the tenant has the right to formally notify the host to add them, and can even request a rent reduction if it exceeds the legal ceiling. This is a powerful protection that requires hosts to be perfectly informed of the amounts applicable in their street or neighbourhood.

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 the summer of 2026, the rent control map is expanding significantly. New urban areas are joining the scheme to respond to a surge in real estate prices that is choking the middle class and students. Among these newcomers are very diverse geographical sectors, demonstrating that real estate tension is no longer the sole preserve of the capital.

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 purchasing power pressure of cross-border workers. Here, rent control 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 abuses, particularly in the small-surface and shared housing sectors.
• Grand-Orly Seine Bièvre: This vast territory in the Paris region joins other public territorial establishments (EPT) in the Paris suburbs to harmonize rent regulation at the gates of Paris.

For hosts located in these new areas, the time for approximation is over. The exact dates of entry into force and the precise division of geographical sectors vary according to local prefectural decrees. An apartment located on one side of a street may have a different reference rent than one located on the sidewalk 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 housing.

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 optimizing 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 for very strict rules to ensure that shared housing does not become a legal loophole allowing for evasion of the cap.

The golden rule is simple but implacable: for shared housing, the total sum of rents paid by all tenants together can in no case exceed the legal ceiling applicable to the entire dwelling. In other words, if you own an 80 m² apartment with an increased reference rent of 1,200 euros, you cannot rent four rooms at 400 euros each (which would total 1,600 euros). The cumulative amount of rents excluding charges received by the host must mandatorily remain lower than or equal to 1,200 euros. This rule applies strictly, whether the dwelling is rented unfurnished or furnished.

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

The case of the single shared housing lease

Under a single lease, all tenants sign the same rental agreement. They are generally bound by a solidarity clause, which means that they are jointly responsible for the payment of the entire 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 apartment or house.

Let us take a concrete example in Cergy, a new area concerned in the summer of 2026. You rent a furnished 75 m² apartment 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 apartment is therefore 1,350 euros (75 x 18). The global rent written on the single lease may not 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 complies with the cap.

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

The case of individual leases by room

The situation becomes a little more complex, but just as regulated, when the host 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 solidarity clause, and departures or arrivals are managed individually. Each contract covers the exclusive use of a specific room and the shared use of common rooms (kitchen, living room, bathroom).

However, the law is formal: the sum of the rents of all individual leases in progress for the same dwelling must not exceed the ceiling applicable to the entire dwelling. If we return to our example of the 75 m² apartment in Cergy with a global ceiling of 1,350 euros. The host 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 makes 1,350 euros, the ceiling is respected.

A major point of vigilance for hosts: if you are renting just one 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 portion of the common areas. This is a calculation that can prove tedious. We strongly recommend using the ANIL simulators to evaluate the weighted surface area and determine the fair and legal rent for the room you are offering on Roomlala.

The 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 host to set a rent higher than the increased reference rent. However, beware of false beliefs! This supplement is absolutely not an automatic right and it is subject to extremely strict conditions, which are moreover increasingly monitored by authorities and challenged by tenants.

For a rent supplement to be legal, the dwelling must present objectively exceptional location or comfort characteristics. These characteristics must fulfil 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 period of construction, the number of rooms, and the type of rental - unfurnished/furnished), they must be decisive for the fixing of the rent compared to dwellings of the same category in the same geographical sector, and they must not give rise to recovery under charges.

It is vital to understand what does NOT justify a rent supplement. A recently refurbished kitchen, the installation of fiber-optic internet, the presence of a simple street-facing balcony, good quality furniture, or dual exposure are considered normal comfort elements or already valued by the classic market. Furthermore, since the 2022 purchasing power law, it is formally forbidden to apply a rent supplement if the dwelling presents certain defects: toilets on the landing, signs of dampness, drafty windows, lack of adequate heating, or if it is classified as a thermal sieve (DPE F or G).

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

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

Failure to comply with rent control is no longer taken lightly by public authorities. Municipalities that join the system in the summer of 2026, such as Annemasse or Cergy, are setting up dedicated teams to spot illegal listings and process reports from tenants. At Roomlala, we strive to inform our hosts of the risks incurred, as our goal is to promote accommodation that is trustworthy, sustainable, and respectful of the law.

Hosts who exceed the legal ceiling without valid justification (or with a rent supplement deemed abusive) are exposed to very dissuasive financial sanctions. If an infringement is noted, the prefect puts the host on formal notice to bring the lease into compliance within two months and to reimburse the overpayment to the tenant. If the host 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 company/SCI). Furthermore, the tenant can take legal action to obtain a rent reduction and retroactive reimbursement of the sums paid in excess, throughout the duration of the lease.

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

In conclusion, the expansion of rent control in the summer of 2026 is an inescapable reality that is profoundly changing rental practices in many new urban areas. Whether you are a host looking to rent a room in good faith or a student joining a shared household in Marseille or Cergy, information is your best ally. At Roomlala, we strongly encourage you to consult official sites such as that of the ANIL or the public service to learn about the prefectural decrees in your sector. By respecting these rules, you guarantee not only 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.