You own a two-bedroom flat near the Canal Saint-Martin, managed from London or New York, and the lease you are about to sign sets the rent at 2,400 euros a month. Your agent tells you the figure is “market price”. A tenant association tells you the legal ceiling for that street is hundreds of euros lower. Both can sound confident, and only one of them is legally relevant. Since 1 July 2019, Paris has lived under the encadrement des loyers (rent control): no residential rent may exceed a ceiling fixed every year by the State, and the figures for 2026 have applied since 1 July 2026 under a prefectural order of 12 June 2026. In parallel, a second nationwide mechanism caps how fast rents may rise when a tenant changes or a lease renews, and a decree of 20 July 2026 has extended that framework from 1 August 2026 to 31 July 2027. For a foreign owner, the trap is not the principle, which is simple, but the procedure: requests served months before the lease ends, a mandatory conciliation step that kills cases when skipped, and a judge who moves the rent in either direction. This guide explains the two caps that govern every Paris lease, the rent supplement landlords often get wrong, and the exact steps for changing or challenging the rent, with the statutes and court decisions behind each rule and practical notes for owners acting from abroad.
I. The Two Caps That Govern Every Paris Lease in 2026
A. The Reference-Rent Ceiling: Median, Plus 20 Percent, Minus 30 Percent
Paris rent control starts from an observation, not a political slogan. The local rent observatory, the observatoire local des loyers, collects thousands of rents actually paid across the capital, and the State representative converts them into three figures per housing category and per geographical sector: the loyer de référence (reference rent), which is the median rent; the loyer de référence majoré (increased reference rent), 20 percent above the median, which is the ceiling no base rent may exceed; and the loyer de référence minoré (reduced reference rent), 30 percent below the median, which matters at renewal. Categories depend at minimum on furnished or unfurnished letting, number of rooms, and construction period, while sectors must form zones with homogeneous rent levels. The Conseil d’État confirmed this architecture twice: first by upholding the decree that placed the whole of Paris under the experimental scheme, holding that the resulting limit on property rights “présente un rapport raisonnable de proportionnalité avec l’exigence d’intérêt général qu’elle poursuit” (CE, 10 May 2022, No. 431495), meaning it shows a reasonable relationship of proportionality with the general-interest objective it pursues, namely access to housing in an unbalanced market; then, in November 2024, by annulling an appeal judgment that had approved the Paris reference rents for the wrong reason and sending the case back, recalling that “Le juge de l’excès de pouvoir, saisi d’un moyen en ce sens à l’appui d’un recours dirigé contre l’arrêté fixant les loyers de référence, ne censure l’appréciation portée par le représentant de l’Etat pour déterminer ces secteurs géographiques qu’en cas d’erreur manifeste” (CE, 18 Nov. 2024, No. 489856), meaning the administrative judge only overturns the State’s definition of geographical sectors for manifest error. The system is therefore legal and durable, but its figures are challengeable at the margins, which is why checking your exact category and sector is never wasted time.
For 2026, the applicable values are those of arrêté IDF-2026-06-12-00003 (prefectural order), signed on 12 June 2026 and applicable in Paris from 1 July 2026 (Paris prefectural orders on reference rents applicable from July 2026). The base rent, meaning rent excluding charges and excluding any supplement, may not exceed the increased reference rent in force on the signing date, and the lease and even the letting advertisement must state the reference figures. The free official simulator run by the regional housing authority lets anyone enter address, rooms, construction period, and furnished status to obtain the three figures for a given flat (DRIEHL Paris reference-rent simulator and orders). Run it before signing anything: it takes five minutes and it is the same tool judges consult. Note that a mobility lease, the short furnished bail mobilité (mobility lease) for students and mobile workers, cannot be renewed at all, and that social housing, approved intermediate housing, tourist furnished flats, and pre-1948-law dwellings follow different rules, so confirm your flat actually falls under the standard scheme before applying the ceiling.
A second, older cap overlaps the first whenever a tenant changes or a lease renews in a tense area. When a vacant flat is re-let, the new rent may not exceed the last rent paid by the previous tenant, adjusted by the indice de référence des loyers (rent reference index, IRL) only if no revision occurred in the preceding twelve months. Three exceptions allow going higher: works of improvement or compliance worth at least half of the last year’s rent, with the annual increase capped at 15 percent of their real cost; a last rent that is manifestly undervalued, with the increase capped at half the gap to comparable neighbourhood rents; and improvement works worth at least a full year’s rent completed within the last six months, which free the rent entirely. This is the mechanism of the 27 July 2017 decree taken under Article 18 of the 6 July 1989 Act, and the Paris protection-litigation court applied it line by line in July 2026, as Section II explains. The nationwide decree of 20 July 2026 keeps this increase-control framework alive from 1 August 2026 to 31 July 2027 (service-public announcement of the 20 July 2026 extension). For a foreign buyer, the consequence is immediate: the rent paid by the seller’s tenant caps what you can charge the next tenant, so ask for the previous lease and the last three rent receipts before exchanging, not after.
B. The Rent Supplement: Three Cumulative Conditions and a Court That Reads Them Strictly
Above the ceiling, only one door exists: the complément de loyer (rent supplement). Article 3 of the decree of 10 June 2015 on implementation procedures allows a supplement only where the location or comfort characteristics of a dwelling meet the following conditions. Those conditions are cumulative and there are three of them: the characteristics must not already have been taken into account in setting the reference rent for the flat; they must be decisive for the rent level, in particular by comparison with dwellings of the same category in the same geographical sector; and they must not already be charged back to the tenant through service charges or energy-saving contributions. A flagship location or exceptional comfort can therefore qualify, but only if it genuinely distinguishes the flat from comparable flats nearby, and the amount of the supplement plus the characteristics justifying it must appear in the lease itself. Silence in the lease means no supplement is owed, whatever the flat is worth in the landlord’s eyes.
The Court of Cassation gave this mechanism its clearest recent illustration on 4 December 2025. A Paris flat let in March 2015 for 5,200 euros a month came up for renewal after rent control had entered into force on 1 July 2019; the tenants sued for reduction to the increased reference rent, and on appeal the landlord obtained a supplement of 6.20 euros per square metre, bringing the rent to 5,356.14 euros, on the ground that the fourth-floor flat enjoyed an unobstructed view over a prestigious historic church opposite the building. The tenants argued that countless Paris flats overlook a church or monument and that one view cannot, alone, distinguish a flat decisively. The Third Civil Chamber rejected the appeal, holding that “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” (Cass. 3rd civ., 4 Dec. 2025, No. 24-15.589), meaning the appeal court could deduce from the immediate proximity of the church, faced by the flat from the fourth floor, that the landlord was entitled to a supplement on top of the applicable increased reference rent, in an amount assessed at its sovereign discretion. Two lessons follow. First, a truly unique location feature can carry a supplement even in a city full of monuments, provided the comparison with the same sector is made. Second, once entitlement is established, trial judges fix the amount freely and the Court of Cassation will not re-weigh the euros, so the battle is fought on entitlement, with photographs, plans, and genuine comparables, not on arithmetic.
Since 18 August 2022, however, some flats can never carry a supplement at all. The official service-public guide lists eight disqualifying defects: sanitary facilities on the landing, damp marks on some walls, an energy rating of F or G, windows letting air through abnormally, a facing distance under ten metres, water infiltration or flooding from outside, drainage problems in the last three months, a degraded electrical installation, or poor exposure of the main room. If any one of these is present, the supplement is prohibited, and charging one exposes the landlord to cancellation plus repayment. The burden of proof lies entirely on the owner or the agent: it is the landlord who must demonstrate the decisive characteristics, not the tenant who must disprove them. For foreign owners, the practical sequence is therefore rigid: verify the energy rating and the physical state of the flat first, then check the simulator, then decide whether a supplement is genuinely defensible, and only then draft the lease clause describing each characteristic precisely. A supplement copied from a neighbouring listing, without evidence tied to your own flat, is the most expensive line a Paris lease can contain, and it is also the easiest for a tenant to destroy. Our Paris real estate practice for foreign clients reviews these clauses before signature, when they can still be saved.
II. Getting the Rent Changed: Renewal Procedures and Challenges That Win or Lose on Deadlines
A. At Renewal: the Landlord’s Upward Action and the Tenant’s Downward Action
Renewal is the moment the statute lets either side reset the rent, but each side has its own track, its own majority, and its own guillotine. The experimental Article 140 of the 23 November 2018 ELAN Act, which governs Paris renewals, opens the landlord’s track with one sentence: “Lors du renouvellement du contrat, une action en réévaluation de loyer peut être engagée dès lors que le loyer est inférieur au loyer de référence minoré.” (Article 140 VI of the Act of 23 November 2018, in force), meaning a rent revaluation action may be brought at renewal whenever the current rent is below the reduced reference rent. Three conditions then frame the landlord’s proposal: the new rent, excluding charges and supplement, must not exceed the reduced reference rent in force when the landlord writes; the increase must stay within the higher of two ceilings, half the gap to comparable neighbourhood rents or an annual amount equal to 15 percent of qualifying works costing at least one year’s rent; and since 22 August 2024, no increase is permitted for a dwelling rated F or G. The landlord must send the proposal at least six months before the lease ends, by registered letter, enforcement-officer writ, or hand delivery against receipt, reproducing Article 140 VI in full and stating the current rent, the reference figures used, and the proposed rent. If the tenant refuses or stays silent, the landlord must seize the commission départementale de conciliation (departmental conciliation commission, CDC) no later than four months before the term, and then the juge des contentieux de la protection (protection-litigation judge) before the lease expires. Miss the judge’s deadline and the lease renews silently on the old rent, with only the annual index revision as consolation.
The Paris Court of Appeal showed in February 2026 how strictly this track is read, and in the landlord’s favour when the paperwork is right. A social landlord sought to raise a 51-square-metre Aubervilliers flat from 449.88 euros, or 8.82 euros per square metre, to 530.40 euros, exactly the reduced reference rent of 10.40 euros per square metre set by the April 2021 prefectural order, with the 80.52-euro increase spread in sixths over six years. The trial judge had thrown the case out for lack of neighbourhood comparables. The appeal court reversed, holding that “C’est ainsi à juste titre que la société bailleresse fait valoir qu’en vertu de l’article 140 VI de la loi du 23 novembre 2018 précité, seul applicable en l’espèce, le bailleur n’a pas à produire des références, contrairement à ce qu’a considéré le premier juge, ce texte les exigeant uniquement du locataire s’il entend contester l’action en réévaluation de loyer par référence aux loyers habituellement constatés dans le voisinage pour des logements comparables” (Paris Court of Appeal, 19 Feb. 2026, RG 23/08880), meaning the landlord rightly argued that under Article 140 VI, applicable alone in a controlled zone, it need not produce comparables, which the statute requires only from a tenant who contests the revaluation by reference to usual neighbourhood rents for comparable dwellings. The court verified the six-month proposal reproducing the statute, the CDC referral and its October 2022 non-conciliation notice, and the energy class E rating, then fixed the renewed rent at 530.40 euros from December 2022, spread by one sixth per year over six years. Note the symmetry the statute imposes: in a controlled zone the landlord’s upward action needs no comparables, but the landlord also may not serve a notice to quit for the same expiry, and any increase above 10 percent on a short first renewal spreads by sixths across two leases, which is why modelling the cash flow over six years, not one, is essential before launching the procedure.
The tenant’s downward track mirrors the landlord’s with shorter fuses. Where the base rent exceeds the increased reference rent, the tenant may propose a reduction at least five months before the term, using the increased reference rent in force on the date of the request, by the same formal means and with the same full reproduction of Article 140 VI. On refusal or silence, the tenant must seize the CDC no later than four months before the term and then the judge before expiry, failing which the lease renews on the previous terms. Tenants often discover this track late, after years of overpaying, and assume the judge can simply rewind the clock at any moment. The judge can indeed fix the rent and order repayment, but only inside the limitation period discussed below, and only after the conciliation step, which is why a tenant who suspects an excessive rent should send the five-month letter even while still gathering comparables. For owners, the defensive lesson is symmetrical: calendar every lease expiry eleven months ahead, verify the current reference figures on the simulator, and never let a tenant’s proposal go unanswered, because silence merely pushes the dispute toward the CDC and then the judge, where an undefended file loses on its own.
B. After Signing: Challenging an Excessive Rent, the Three-Year Clock, and the Conciliation Trap
A tenant who signed too high is not without remedy, but the remedy has three gates and the first one is fatal when missed. Where the base rent, mentioned in the lease or not, exceeds the increased reference rent, the tenant may seek reduction and repayment of the overpaid sums from the landlord, first through the CDC and, if conciliation fails, before the protection-litigation judge of the flat’s location, while also reporting the breach to the City of Paris, which can fine the owner 5,000 euros for an individual and 15,000 euros for a company. In July 2026 the Paris court gave this gate a spectacular illustration: a tenant claiming 25,639.96 euros for overpayments on a flat re-let in December 2021 at 1,865 euros, where the previous tenant had paid 1,383.06 euros, with indexation pushing the rent to 1,997.57 euros and no energy diagnosis attached to the lease, saw the entire claim declared inadmissible. The court held that “Il était donc bien soumis à une saisine de la commission départementale de conciliation de façon préalable et obligatoire à la saisine du juge par l’une ou l’autre des parties à peine d’irrecevabilité” (Paris Judicial Court, 2 July 2026, RG 25/00871), meaning the dispute, turning on the revaluation of the rent on re-letting a vacant flat in a controlled municipality, was subject to mandatory prior referral to the conciliation commission on pain of inadmissibility. Twenty-five thousand euros of arguable overpayment died on a procedural omission, without any examination of the merits, the missing diagnosis, or the unproven 48,000 euros of works the landlord invoked. Seize the CDC first, in writing, keeping proof of dispatch: everything else comes second.
The second gate is time. All actions arising from a lease, including reduction and repayment claims, are governed by Article 7-1 of the 6 July 1989 Act: “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.” (Article 7-1 of the Act of 6 July 1989), meaning every action derived from a lease is time-barred three years after the right-holder knew or should have known the facts enabling the claim. The Court of Cassation applies this three-year rule strictly to lease-derived actions, including in its 6 April 2023 ruling recalling the transitional computation when limitation periods were shortened (Cass. 3rd civ., 6 Apr. 2023, No. 22-13.778). Do not confuse this with the general five-year period of Article 2224 of the Civil Code, which provides: “Les actions personnelles ou mobilières se prescrivent par cinq ans à compter du jour où le titulaire d’un droit a connu ou aurait dû connaître les faits lui permettant de l’exercer.” Any personal or movable action is time-barred after five years from when the holder knew or should have known the facts. In leases, the special three-year rule prevails, so each monthly overpayment has its own starting point and old months fall away one by one. In practice, a tenant should act within months of discovering the excess, and a landlord receiving a claim should immediately check which months are already out of time rather than negotiating the total as a lump sum.
The third gate is proof of what was unduly paid, and here the Civil Code helps the tenant with a short, sharp sentence: “Tout paiement suppose une dette ; ce qui a été reçu sans être dû est sujet à restitution.” (Article 1302 of the Civil Code), meaning every payment presupposes a debt, and whatever was received without being owed must be returned. The excess over the lawful ceiling is, by definition, received without being owed, which founds the repayment claim once the judge fixes the lawful rent. Challenging the supplement itself runs on an even shorter fuse: the tenant must seize the CDC within three months of signing, with the landlord bearing the burden of justifying the supplement, and then the judge within three months of receiving the CDC’s notice, with the judge free to cancel or reduce the supplement retroactively to the lease start date. For owners in Paris and the inner suburbs, the operational checklist is therefore short and unforgiving: state all three reference figures in every lease and advertisement, attach a genuine energy diagnosis, describe any supplement characteristic by characteristic with evidence, keep the previous tenant’s last rent on file for the next letting, and diary the six, five, four, and three-month deadlines the day each lease is signed. Landlords act under the general duty that Article 1719 of the Civil Code expresses in these terms: “Le bailleur est obligé, par la nature du contrat, et sans qu’il soit besoin d’aucune stipulation particulière : ” The landlord is bound, by the nature of the contract and without any need for a specific clause. Everything above flows from that nature once the State has fixed the figures. One final flag for non-resident owners: rental income remains taxable in France with its own filing duties, so have the rent level validated for control purposes and the income declared through your usual cross-border channel; this guide states no tax figures because rates depend on personal situations. Cases of this kind are routinely handled from abroad through a Paris lawyer and enforcement officer, which is the setting of our Paris real estate practice for foreign clients.
Conclusion
Paris rent control rewards the party that masters figures and calendars, not the party that shouts loudest about market prices. The ceiling is the increased reference rent in force at signing, refreshed each year, currently by the June 2026 order effective since 1 July; above it, only a supplement meeting three cumulative conditions survives, with eight physical defects barring it outright since 2022 and the landlord carrying the proof. At renewal, the landlord may lift a rent that sits below the reduced reference rent without producing comparables, while the tenant may pull down a rent above the increased reference rent, both through six-month and five-month proposals, mandatory conciliation four months before the term, and a judge seized before expiry. After signing, the tenant’s challenge passes through conciliation first on pain of inadmissibility, as the July 2026 Paris judgment shows, inside a three-year limitation period with repayment of the undue excess. Run the official simulator before every signature, write every figure into the lease, and diary every deadline on day one: in this field, procedure is substance.
Need a quick opinion on your case
If your Paris rent may exceed the legal ceiling or your supplement is being challenged, a telephone consultation with a lawyer from our firm within 48 hours can clarify your figures and your deadlines. Call us at +33 6 46 60 58 22 or write through our contact page with your lease, your reference-rent simulation, and any conciliation notice you have received.