You have just signed a lease in Paris, and the monthly rent looks high for the size of the flat. Or you own a Paris apartment and you wonder how far above the neighbourhood median you may lawfully go. In 2026, both questions fall under the same mechanism: the encadrement des loyers (rent cap) that applies in Paris and several other tight housing markets. A 2026 barometer reported that 46% of Paris listings exceeded the cap, and the Government extended the parallel ceiling on rent increases until 31 July 2027 by a decree of 20 July 2026. For foreign tenants and foreign landlords, the stakes are concrete: overpaid rent can be recovered, and unjustified surcharges can cost the landlord an administrative fine on top of the refund. This guide explains how the ceiling works, how to challenge an excessive rent step by step, and how to close a tenancy without losing the deposit.

I. The Paris rent ceiling: reference rents, authorised surcharges and the first checks

A. Reference rents and the surcharge a landlord may add

Since the ELAN statute of 23 November 2018, an experimental rent-cap scheme can be introduced in tight housing areas at the request of the local authority. For each covered territory, the State representative sets every year, by administrative order, a loyer de référence (reference rent), a loyer de référence majoré (increased reference rent) and a reduced reference rent, expressed as a price per square metre of living space by dwelling category and geographic sector. The framework is laid down in article 140 of the ELAN statute, which states that each reference rent equals the median rent observed by the local rent observatory, that the increased reference rent stands 20% above it and that the reduced reference rent stands 30% below it. Paris has applied the scheme since 1 July 2019, and the prefect of the Ile-de-France region publishes the Paris tables every year. A complementary statute, article 17 of the statute of 6 July 1989, defines the tight areas concerned: continuous urban zones of more than 50,000 inhabitants with a marked imbalance between housing supply and demand.

In a covered area, the base rent agreed in the lease must stay at or below the increased reference rent in force on the signing date. The lease itself must state the reference rent and the increased reference rent for the category concerned. If that information is missing, the tenant may, within one month of the lease taking effect, formally require the landlord to add it, and if the landlord does not reply within a month or refuses, the tenant may ask the court for a rent reduction within three months of that formal notice. For a foreign tenant signing from abroad, often in English through an agent, this first check is the cheapest protection available: compare the base rent, before charges, with the increased reference rent for the same sector and category, and verify that both figures appear in the lease.

Above the increased reference rent, only one supplement is lawful: the complément de loyer (rent surcharge). Article 140, III, B of the ELAN statute provides: « Un complément de loyer peut être appliqué au loyer de base tel que fixé au A du présent III pour des logements présentant des caractéristiques de localisation ou de confort le justifiant, par comparaison avec les logements de la même catégorie situés dans le même secteur géographique. » In plain English, a surcharge is only lawful for dwellings whose location or comfort features genuinely set them apart from comparable flats in the same sector, and the amount of the surcharge and the features justifying it must be written into the lease. No surcharge may be added to a base rent that is already below the increased reference rent, and several defects exclude any surcharge outright: shared toilets on the landing, signs of damp on walls, an energy rating of F or G, windows letting air through abnormally, a facing building less than ten metres away, water infiltration or flooding from outside, drainage problems in the previous three months, degraded wiring, or poor orientation of the main room.

The Cour de cassation clarified how courts review such surcharges in a Paris case decided on 4 December 2025 (Third Civil Chamber, appeal no. 24-15.589). Tenants of a Paris apartment rented at 5,200 euros per month had sued at renewal for a reduction to the increased reference rent; on appeal, the landlord company asked for a surcharge. The court of appeal granted it, noting that the flat enjoyed an unobstructed view of a prestigious historic church it faced, from the fourth floor, and the Cour de cassation rejected the tenants’ appeal, holding: « ce dont elle a pu déduire que la bailleresse était fondée à réclamer, en sus du loyer de référence majoré applicable, un complément de loyer dont elle a souverainement apprécié le montant. » The lesson is twofold: a genuine, specific feature of the dwelling itself, such as an exceptional view, can justify a surcharge, but the trial judges assess its amount sovereignly, which makes the outcome hard to overturn on appeal. Generic claims about a sought-after neighbourhood are not enough; the comparison must be with dwellings of the same category in the same sector.

Landlords should also keep a second, parallel mechanism in mind. Under article 17-2 of the 1989 statute and the annual decree taken under article 18, rent increases on reletting or renewal in tight areas are capped by reference to the last rent charged, indexed. The official Service Public portal confirms that this ceiling on increases was extended until 31 July 2027 by the decree of 20 July 2026. A Paris lease can therefore breach the law in two distinct ways: a base rent above the increased reference rent, or an increase between two tenants beyond the authorised indexation. Foreign owners who bought a Paris flat as an investment should check both before setting the rent for a new tenant. Our Paris real estate practice regularly reviews leases against both ceilings before signature.

B. Contesting the rent or the surcharge: conciliation first, then the judge

A tenant who believes the base rent exceeds the increased reference rent may bring an action for reduction, and a tenant who disputes the surcharge must act within three months of signing the lease by seizing the commission départementale de conciliation (departmental conciliation board) provided for in article 20 of the 1989 statute. This prior conciliation step is mandatory: the judge may raise the failure to seize the board on his own motion, and the tenant then has three months from receiving the board’s opinion to bring the dispute before the court. Crucially, once the surcharge is challenged, the burden of proof lies with the landlord, who must demonstrate, by comparison with dwellings of the same category in the same sector, that the location or comfort features genuinely justify it. The rent resulting from the conciliation agreement or the court decision applies retroactively from the date the lease took effect, which is why successful claims produce refunds covering the whole period since signature.

A Paris decision of 25 May 2023 shows how large those refunds can be (Paris Court of Appeal, general roll no. 17/04761). The tenants of a 64.2 square metre apartment on the fourth floor of a Paris building paid a monthly rent of 1,890.30 euros including a surcharge of 317.40 euros. They seized the conciliation board within weeks of signing; the board found the surcharge unjustified and capped the rent at the increased reference rent of 1,572.90 euros, with the deposit reduced accordingly and the overpayments refunded. After unsuccessful conciliation, the tenants went to court, and the court of appeal ordered the landlord company to pay 28,111.18 euros for rent overpaid between 21 December 2015, when the lease took effect, and 28 February 2023, and fixed the 2023 rent at 1,711.16 euros excluding charges. For a foreign tenant, the practical message is clear: challenge early, keep every rent receipt, and do not let an unjustified surcharge run for years, because each monthly payment above the lawful rent increases the recoverable amount.

At renewal, the statute organises a mirror procedure. If the rent under the lease, excluding any surcharge, exceeds the increased reference rent, either party may propose a new rent at least six months before expiry for the landlord and five months for the tenant, following the formalities of article 15 of the 1989 statute. The notification must reproduce the statutory provisions in full, failing which it is void, and a landlord who uses this route may not give notice to vacate for the same expiry date. If the parties disagree, or if the other side has not replied four months before expiry, either may seize the conciliation board, and then the judge before the lease expires; otherwise the lease continues on the previous rent terms. Landlords seeking an upward reassessment must support it with at least three comparable rents in the neighbourhood, or six in conurbations of more than one million inhabitants, which includes Paris, drawn from the same group of buildings or similar ones in the same geographic area. Any agreed or court-ordered increase is then spread over time, by thirds or by sixths depending on the length of the lease. Foreign landlords should calendar these deadlines carefully, because a notice served late or without the mandatory references fails, while the tenant’s own reduction action remains available.

II. Recovering overpaid rent and closing the tenancy cleanly

A. Getting the overpayment back: the prefect, the fine and the three-year clock

Beyond the court action, the tenant has an administrative route that costs nothing to trigger. When the State representative in the department finds that a lease breaches the cap, he may formally require the landlord, within two months, to bring the lease into compliance and to refund the overpaid rent. Article 140, VII of the ELAN statute states: « il peut mettre en demeure le bailleur, dans un délai de deux mois, d’une part, de mettre le contrat en conformité avec le présent article et, d’autre part, de procéder à la restitution des loyers trop-perçus. » In other words, the prefect’s mise en demeure (formal notice) orders both correction of the lease and repayment of the trop-perçu (overpaid rent). The landlord is informed of the penalties and may submit observations within one month. If the notice goes unheeded, the State representative may impose a fine of up to 5,000 euros on an individual landlord and 15,000 euros on a company, with reasons and remedies stated; the fine does not prevent the tenant from pursuing the court action for reduction. In Paris, these powers may be delegated to the mayor of Paris. A foreign tenant who receives no answer from the landlord can therefore alert the prefecture in parallel with the conciliation board, and a foreign landlord who receives such a notice should treat the two-month deadline as hard: compliance plus voluntary refund usually avoids the fine.

The court route for recovering overpayments rests on ordinary civil foundations. Article 1302 of the Civil Code provides: « Tout paiement suppose une dette ; ce qui a été reçu sans être dû est sujet à restitution. » Every payment presupposes a debt, and what was received without being owed must be returned. Rent collected above the lawful ceiling is, for the excess part, received without being owed, which is exactly what the Paris Court of Appeal refunded over more than seven years in the 2023 case. Research for this article surfaced a steady flow of recent Paris first-instance judgments on the recovery of overpaid rent, including decisions of 23 April 2026 and 1 September 2026, confirming that the capital’s protection-litigation judges apply these rules week after week. Tenants should nevertheless watch the limitation period: article 7-1 of the 1989 statute provides that « Toutes actions dérivant d’un contrat de bail sont prescrites par trois ans à compter du jour où le titulaire d’un droit a connu ou aurait dû connaître les faits lui permettant d’exercer ce droit. » All actions arising from a lease are time-barred after three years from the day the right-holder knew or should have known the facts enabling the claim. In practice, each excessive monthly payment starts its own clock, so delay progressively shrinks the recoverable period.

Tenants in poorly maintained flats often combine the rent-cap claim with a decency claim, and the Cour de cassation strengthened that combination on 4 June 2026 (Third Civil Chamber, appeal no. 24-11.437). The Court held that the landlord’s duty to deliver decent housing is continuous throughout the lease: « L’obligation de délivrance d’un logement décent, continue, est exigible pendant toute la durée du bail. » The tenant may therefore demand specific performance of that duty for as long as the breach lasts, and obtain compensation for the harmful consequences of the breach over the three years preceding the court claim. Because damp, poor energy ratings and degraded wiring both bar any rent surcharge and breach the decency duty, a single expert report can serve both claims. Note the boundary drawn on 14 December 2023 (Third Civil Chamber, appeal no. 21-21.964): the delivery and decency provisions « sont applicables aux seuls logements objet d’un bail d’habitation », meaning they apply only to dwellings let under a residential lease, not to commercial or purely professional premises. A bail d’habitation (residential lease) is, under article 1709 of the Civil Code, the contract by which one party undertakes to let the other enjoy a thing for a certain time for an agreed price, and article 1719 obliges the landlord to deliver, for a tenant’s main home, decent housing, to maintain it fit for the agreed use and to ensure peaceful enjoyment.

For Paris and the Ile-de-France region specifically, the practical channel is well marked. The competent bodies are the Paris departmental conciliation board for the free first step, then the juge des contentieux de la protection (protection-litigation judge) of the Paris judicial court for the court stage, with the prefecture of the Ile-de-France region handling formal notices and fines. The file to prepare is the same in every case: the signed lease with the stated reference rents, the yearly prefectural order tables for the sector, all rent receipts, the inventory of condition with dated photographs, any expert or bailiff report on damp or defects, and copies of every letter exchanged with the landlord. Foreign parties living abroad can be represented by counsel and should keep proof of dispatch of every deadline-sensitive letter, since the three-month conciliation windows and the three-year limitation period are strict. Tenants regularly win; landlords who document genuine comparable features and keep their surcharges proportionate keep their rents.

B. The deposit at exit: deadlines, the automatic 10% penalty and who proves what

When the tenant leaves, the last dispute is often the dépôt de garantie (security deposit), capped at one month’s rent. Article 22 of the 1989 statute requires return within one month of the handover of the keys if the exit inventory matches the entry inventory, and within two months otherwise, less any sums duly documented as still owed by the tenant or owed by the landlord in the tenant’s place. The tenant must give the new address when handing over the keys. Any deduction must be documented: unpaid rent, repair costs supported by invoices or estimates compared against the two inventories, and regularisation of charges. A landlord who simply keeps the deposit without paperwork reverses the risk onto himself, because the statute attaches an automatic penalty to late return.

That penalty runs by operation of law, as the Cour de cassation confirmed on 12 February 2026 (Third Civil Chamber, appeal no. 24-21.258). After a furnished tenancy ended, the tenant sued for the deposit plus the monthly 10% increase; the first judge rejected the increase because the landlord produced a cheque stub dated 9 April 2021 and a letter allegedly sent to the address given in the exit inventory, even though the tenant said he never received the cheque and it was never cashed. The Cour de cassation quashed that part of the judgment. It recalled first the burden of proof: « Celui qui réclame l’exécution d’une obligation doit la prouver. » Whoever claims performance of an obligation must prove it, under article 1353 of the Civil Code, so the landlord claiming to be discharged had to prove the tenant actually received the cheque. Then it stated the rule: « la majoration court de plein droit à l’issue du délai de deux mois suivant la remise des clés. » The 10% monthly increase on the outstanding deposit runs automatically once the two-month period after the return of the keys expires. For foreign landlords, the message is operational: pay by bank transfer with proof of receipt, never by an unverifiable cheque, and calendar the one- or two-month deadline from the key handover. For foreign tenants, an unreturned deposit grows by 10% of the monthly rent for each month of delay, and the landlord’s bare assertion of payment does not stop the clock.

In collective buildings, the deposit interacts with the annual settlement of service charges. On 31 May 2018 (Third Civil Chamber, appeal no. 17-18.069), the Cour de cassation recalled that the deposit guarantees the tenant’s performance and that, in a collective building, final settlement of charges and return of the balance occur within one month after final approval of the building’s accounts. It quashed a proximity-court judgment that had mishandled that articulation and the computation of the 10% increases. Landlords in Paris copropriété (co-ownership) buildings should therefore distinguish three envelopes at exit: documented damage, charges withheld pending the approved accounts with a final settlement to follow, and the undisputed balance returned immediately. Mixing them, or holding the whole deposit hostage to an unapproved charge statement, exposes the landlord to the automatic increase on the part that should already have been returned. Further guidance on Paris co-ownership disputes is available through our Paris real estate team.

Conclusion

Paris rent control rewards the party who checks the figures early and respects the deadlines. Before signing, compare the base rent with the increased reference rent for the sector and require both reference figures in the lease. Within three months, challenge any unjustified surcharge through the conciliation board, where the landlord bears the burden of proof, and alert the prefecture if the landlord refuses to comply, since formal notice can produce both correction and a refund under threat of a fine of up to 5,000 or 15,000 euros. At renewal, calendar the six- and five-month notice periods and the required comparable rents. After departure, the deposit must come back within one or two months, with a 10% monthly increase running automatically on any outstanding balance that the landlord cannot prove he paid. Kept documents, comparable rents and proof of payment decide these cases far more often than rhetoric, in Paris as elsewhere in France.