You bought a flat in France before or after Brexit, you live in London, Manchester or Edinburgh, and the maths looks tempting: rather than leaving the property empty for eleven months a year, let it furnished to holidaymakers or business travellers. The income could cover the taxe foncière (French local property tax), the charges de copropriété (service charges payable to the block management) and perhaps the mortgage. Then a neighbour mentions a fine of up to 100,000 euros, the mairie (town hall) refuses a permit, the building manager cites the règlement de copropriété (the block by-laws governing every flat), and the French tax office asks why you never registered the letting. This guide explains, for a British owner, how furnished letting works in France after Brexit, where the traps sit, and how to challenge a refusal or a penalty through the proper procedure.

French law distinguishes sharply between an ordinary furnished tenancy, where the tenant lives in the flat as their home, and a meublé de tourisme (furnished tourist accommodation let to passing guests). The statute defines the latter in these exact terms: the Code du tourisme states that furnished tourist accommodation means furnished villas, flats or studios for the exclusive use of the guest, offered for letting to passing customers who do not take up residence there and whose stay is characterised by a letting by the day, week or month. The original French wording reads “les meublés de tourisme sont des villas, appartements ou studios meublés, à l’usage exclusif du locataire, offerts à la location à une clientèle de passage qui n’y élit pas domicile et qui y effectue un séjour caractérisé par une location à la journée, à la semaine ou au mois”. If your guests stay a few nights or a few weeks and keep their real home elsewhere, you fall inside this definition, and the full registration and planning regime applies. If instead you grant a one-year furnished tenancy to a student or employee who lives there, you remain under ordinary tenancy law, built on the old civil-law proposition that the Civil Code defines hire as a contract by which one party undertakes to allow the other to enjoy a thing for a certain time for a certain price, namely “Le louage des choses est un contrat par lequel l’une des parties s’oblige à faire jouir l’autre d’une chose pendant un certain temps, et moyennant un certain prix que celle-ci s’oblige de lui payer”. The distinction matters because short-stay letting in larger towns now requires prior registration, sometimes a planning permission, and always a tax filing, whereas a long furnished tenancy does not.

Brexit changed your administrative position but not the underlying property rules. Since 1 January 2021 you are a third-country national: you need no residence permit to own a flat, but you may stay in the Schengen area for no more than 90 days in any 180-day period without a visa, you file French tax on French-source rents even while resident in the United Kingdom, and every platform from Airbnb to Booking.com must display your registration number. Many British owners discover the system only when the mairie writes, when the platform delists the advert, or when the syndic (the managing agent of the block) forwards a solicitor letter from the syndicat des copropriétaires (the collective body of all flat owners). At that point the question is no longer whether the rules exist but whether you can regularise, whether the refusal is lawful, and how to contest an excessive fine. The two parts below answer those questions in order: first the planning and registration gates you must pass before taking a single booking, then the tax and enforcement consequences once money changes hands.

I. Can a British owner lawfully let a French flat furnished to tourists?

A. How do I register my meublé de tourisme and when does Paris demand a change-of-use permit?

Every British owner who offers a meublé de tourisme must first declare it. The rule is blunt: the Code du tourisme requires every person who offers tourist furnished accommodation to file a prior declaration for registration through the national teleservice, in French “Toute personne qui offre à la location un meublé de tourisme procède préalablement en personne à une déclaration soumise à enregistrement auprès d’un téléservice national opéré par l’organisme public unique mentionné au premier alinéa du II de l’article L. 324-2-1”. You file online, you state whether the flat is your main home within the meaning of the tenancy statute of 6 July 1989, and the teleservice immediately issues an electronic acknowledgement with a declaration number. That number, together with the supporting documents, is at once made available to the commune where the flat sits. You must update the declaration whenever the details change and renew it when the decree period expires. A commune that finds no declaration, a false declaration or a false number can impose administrative fines of up to 10,000 euros for a missing declaration and up to 20,000 euros for a false one, ordered by the commune itself. The declaration is therefore the cheapest compliance step and the first document any challenger will ask for.

Your advert itself must carry that number. The Code du tourisme provides that every offer of a tourist furnished letting must contain the declaration number and state whether the offer comes from a private individual or a professional, namely “contient le numéro de déclaration mentionné au III du même article L. 324-1-1” and must state whether the letting comes from a private individual or a professional. More generally, seasonal letting offers and contracts must be in writing and state the price and a descriptive inventory of the premises, that is “Toute offre ou contrat de location saisonnière doit revêtir la forme écrite et contenir l’indication du prix demandé ainsi qu’un état descriptif des lieux”. Platforms now verify the number automatically and the mairie cross-checks adverts against the register, so an advert without a number is quickly flagged. If the platform delists you, keep the screenshot, the acknowledgement of your filing and the platform message: that bundle is the starting point of any appeal.

The second gate is planning law, and it is the one that catches British second-home owners in Paris, Lyon, Marseille, Bordeaux, Nice and every other tense housing market. The Construction and Housing Code catches every category of dwelling and its annexes, including caretaker flats, service rooms, staff accommodation and furnished premises let under the furnished-tenancy regime, expressed as “Constituent des locaux à usage d’habitation toutes catégories de logements et leurs annexes, y compris les logements-foyers, logements de gardien, chambres de service, logements de fonction, logements inclus dans un bail commercial, locaux meublés donnés en location dans les conditions de l’article L. 632-1”. In the listed communes the council may decide that any change of use (changement d’usage) of such a dwelling needs prior authorisation. That prior change-of-use authorisation is issued by the mayor of the commune where the building stands: “L’autorisation préalable au changement d’usage est délivrée par le maire de la commune dans laquelle est situé l’immeuble”. It is granted personally, it lapses when the beneficiary definitively stops the activity, and where compensation (compensation, the conversion of other floor space back into housing) is required the permission attaches to the flat and is published at the land registry. The council sets the grant conditions and the compensation ratios by district in light of social-mix objectives and local housing pressure.

In practice the City of Paris applies the strictest version. Its published rules, summarised on the municipal information page on tourist furnished lettings, draw three lines that every British reader should memorise. If you let your main home, you may do so for no more than 90 days per calendar year in Paris (the national statute allows up to 120 days but lets councils reduce the ceiling to 90, and Paris has done so). If you let a flat that is not your main home, you need a change-of-use authorisation with compensation, which in central Paris typically means buying or funding an equivalent area of commercial space converted back to housing, a cost that often exceeds 1,000 euros per square metre. If you let a shop, office or garage as tourist accommodation, you need a separate authorisation for premises that were never dwellings. The national register page on turning a second home into holiday accommodation and the Paris page on the rules for tourist furnished lettings in Paris say the same in plain administrative English. A British owner whose French flat is by definition a second home therefore cannot rely on the 90-day tolerance: any repeated short letting of that second home in Paris, and in many comparable cities, needs the mayoral authorisation before the first guest arrives. The Court of Justice of the European Union has upheld that very system. In the Cali Apartments judgments of 22 September 2020 (C-724/18 and C-727/18), endorsed by the Cour de cassation, the Court held that a national rule which subjects repeated short letting to passing guests to prior authorisation in tight housing markets is justified by an overriding reason of general interest in fighting the shortage of long-term rental housing and proportionate to that aim. The Cour de cassation, Third Civil Chamber, 18 February 2021, No. 19-13.191 (official judgment 19-13.191), drawing the consequences, states that Article L. 631-7, paragraph 6, which subjects to prior authorisation the repeated short-term letting for payment of furnished premises intended for housing to passing customers, is justified by that imperative reason. The long French reasoning, which you should quote in any challenge only through its operative holding, explains that such a scheme pursues the guarantee of a sufficient supply of long-term housing at affordable prices and that ex post control would come too late to be effective. Authorisation regimes in tense zones are therefore lawful in principle; your challenge must attack the individual decision, not the existence of the regime.

B. Will my copropriété by-laws or my lease forbid holiday lets even with a council permit?

A mayoral authorisation never overrides private property law. Before spending money on compensation, read your règlement de copropriété and, if you bought through a company or with a mortgage, your loan and insurance terms. Most Paris and Riviera by-laws written before 2015 designate the building as “à usage exclusif d’habitation” (for residential use only) or “à usage d’habitation bourgeoise” (for high-standard residential use). Others allow “professions libérales” (self-employed professional offices) but say nothing about tourists. The Cour de cassation reads those clauses literally and enforces them at the request of any co-owner or of the syndicat des copropriétaires.

The governing principles were restated on 16 October 2025 by the Third Civil Chamber, No. 24-14.303 (official judgment 24-14.303). The Court recalls that conventional by-laws determine the use of both private and common parts and the conditions of their enjoyment, namely “un règlement conventionnel de copropriété, incluant ou non l’état descriptif de division, détermine la destination des parties tant privatives que communes, ainsi que les conditions de leur jouissance”, and that each co-owner uses and enjoys their private parts and the common parts on condition that they harm neither the rights of the other co-owners nor the use assigned to the building, that is “chaque copropriétaire dispose des parties privatives comprises dans son lot ; il use et jouit librement des parties privatives et des parties communes sous la condition de ne porter atteinte ni aux droits des autres copropriétaires ni à la destination de l’immeuble”. Where the building was conceived and sold as a résidence de tourisme (a classified tourist residence operated as a homogeneous whole by a single manager), the Court enforces the durable letting obligation and the single-manager model against owners who try to let independently. Where the building is purely residential, the Court lets the collective prohibit repeated comings and goings, suitcases in the lift, key boxes on the facade and late-night arrivals as incompatible with the residential character. The practical test applied by the courts is concrete: frequency of turnover, noise and disturbance, use of common parts by people who never live there, and any commercial signage or lockbox. An owner who lets 150 nights a year through two platforms, with cleaners rotating every two days, will struggle to argue that nothing has changed in the enjoyment of the common parts.

Do not confuse the council and the block. A change-of-use authorisation from the mayor protects you against the commune and the 100,000-euro civil fine, but it does not bind the civil court hearing the neighbours. Conversely, a tolerant general meeting that votes to allow tourist lettings does not exempt you from the mayoral authorisation or the national registration. You need both green lights. The order of operations for a British owner should therefore be: first, obtain the full by-laws and the last three years of general-meeting minutes from the syndic and have the use clause read strictly; second, write to the syndic describing precisely the intended use (number of nights, platforms, house rules, insurance) and ask for written confirmation that it is compatible or for a vote; third, only then file the national declaration and, where needed, the change-of-use application. If the syndic refuses to answer, send the request by recorded delivery (lettre recommandée avec accusé de réception) so the silence is documented. If the general meeting refuses, you may challenge the resolution within two months of notification on the grounds exhaustively listed by the statute on co-ownership, but you may not simply ignore it: courts order cessation of the lettings under penalty (astreinte, a daily fine per day of delay) and award damages to the collective.

British buyers sometimes hold the flat through a société civile immobilière (a French non-trading property company, universally called an SCI) or an English company. The SCI changes nothing in planning or co-ownership law: the declarant is whoever offers the letting, the change-of-use applicant is the owner of the walls, and the fine follows the offender and the beneficiary of the breach. Lenders add a further layer: most French residential mortgages forbid short-term letting without prior consent, and standard multi-risk home insurance (assurance multirisque habitation) excludes paying-guest activity unless extended. Notify both before letting. A refusal of consent from the lender is a contractual matter, challenged under contract law, whereas a refusal from the mayor follows administrative review and a fine from the president of the judicial court follows civil enforcement, each with its own deadline. Mixing the three routes is the most common procedural error in British files.

II. What tax do I pay and how do I fight a refusal or a fine?

A. How is my furnished rental taxed in France and in the United Kingdom?

Furnished letting profits received by an individual are, as a rule, bénéfices industriels et commerciaux (commercial profits, universally shortened to BIC), not rental income from bare premises and not non-commercial profits. That classification drives everything: the return to file, the allowances, the social charges and the treaty credit in the United Kingdom. The official English-language page on income tax on furnished lettings summarises the two regimes, and the impots.gouv.fr leaflet for non-professional furnished lenders gives the worked detail. You choose, or by default fall into, either the simplified micro-BIC (a flat-rate allowance regime) or the actual-cost régime réel (deduction of genuine expenses and depreciation).

The 2024 reform known as the Le Meur Act, Law No. 2024-322 of 9 April 2024, tightened the micro-BIC for tourist furnished lettings while leaving the general furnished-tenancy regime more generous, and the Finance Acts for 2025 and 2026 carried the new thresholds into the Tax Code. The Tax Code now caps the micro-BIC for operators whose main activity is letting tourist furnished accommodation at 15,000 euros of prior-year turnover, worded as “1° bis 15 000 € s’il s’agit d’entreprises dont l’activité principale est de louer directement ou indirectement des meublés de tourisme, au sens du I de l’article L. 324-1-1 du code du tourisme, autres que ceux mentionnés aux 1° et 2° du I de l’article 1414 bis du présent code”. Within that small envelope the taxable profit equals turnover minus a 30 per cent flat allowance (with a 305-euro minimum). Classified tourist accommodation (meublé de tourisme classé, officially star-rated) and guest rooms (chambres d’hôtes) keep higher ceilings and a 50 per cent allowance under defined conditions, while ordinary long-term furnished letting outside tourist accommodation keeps the 77,700-euro ceiling and 50 per cent allowance. Above the ceiling, or by election, the régime réel taxes the net profit after agency fees, taxe foncière, insurance, interest, repairs, accounting fees and depreciation of the building (excluding land), furniture and works, with loss relief carried forward under BIC rules. Election for the actual-cost regime is made by ticking the appropriate box on the supplementary return and binds you for the statutory period; missing the deadline leaves you in micro-BIC for the year, a frequent and costly oversight for British owners who file late from abroad.

Filing mechanics depend on residence. If you remain resident in the United Kingdom and the flat is your only French source, you file a French non-resident return (form 2042 plus supplement 2042-C PRO for BIC, with the European property schedule where required), declare the gross rents, apply micro-BIC or compute the real profit, and pay income tax at the non-resident minimum rate plus the 17.2 per cent social levies (prélèvements sociaux) on the net. If you have moved to France and are French-resident, the same BIC profit joins your worldwide return (forms 2042, 2042-C PRO and, where depreciation is claimed, the professional schedule 2031), and the 6.8 per cent deductible element of the social charges operates through the normal mechanism. Either way you must also register the business start with the business formalities office (guichet des formalités des entreprises, the single online desk that replaced the old P0i form), obtain a SIRET number, and tick the non-professional furnished lender box (loueur en meublé non professionnel, shortened to LMNP) unless you meet the professional thresholds of registration at the trade register plus revenue and amount tests. Professional status (loueur en meublé professionnel, or LMP) brings loss relief against general income but also social-security affiliation as self-employed and wealth-structure consequences; most British second-home owners remain LMNP, which keeps the activity within the private-asset sphere while still taxing the profit as BIC.

Value added tax is the next question every British owner asks, and the answer is usually reassuring but conditional. Bare and ordinary furnished lettings are exempt without option. Tourist furnished accommodation with only the keys and linen remains exempt. You cross into taxable hotel-like (parahôtelier) territory only if you supply at least three of the four hotel services (breakfast, regular cleaning during the stay, linen supply during the stay, reception of guests) on top of the accommodation, in which case VAT at 10 per cent applies to the whole price and registration follows. The taxe de séjour (visitor levy collected for the commune) applies regardless: you collect the nightly amount per adult guest according to the local council scale, display it separately, remit it through the platform or directly, and keep the collection register. Platforms collect it automatically in many communes but not everywhere, and the owner remains liable for any shortfall. Keep every platform statement, every guest invoice and every council receipt for six years: in a reassessment the burden of proving the number of nights and the services supplied sits with you. Readers who also let the same flat bare between seasons should consult the companion analysis of bare letting while non-resident, which details the treaty credit mechanics that also frame furnished profits: how a British owner who returns to the United Kingdom reports French rents and claims the treaty credit. And owners weighing whether to keep the flat at all should read the analysis of the residence surcharge that now punishes vacancy and second ownership in many communes: why a British second home now faces a surcharged residence tax of up to 60 per cent.

The France-United Kingdom double tax treaty of 19 June 2008, as amended, allocates the primary right to tax immovable-property income to France (Article 6) and obliges the United Kingdom to relieve the double charge by credit (Article 24), with business profits taxable in France where the letting is carried on through a fixed base or, for property income, where the building stands. In plain terms: France taxes first, the United Kingdom taxes second on the worldwide return of a United Kingdom resident, and His Majesty Revenue and Customs credits the French tax actually paid on the same profit up to the United Kingdom liability on that profit. The credit never exceeds the United Kingdom tax on the doubly taxed slice, exchange differences and timing gaps are yours, and no credit is due for French penalties or for social levies that are not covered taxes. File France first, obtain the French assessment (avis d’imposition), then claim Foreign Tax Credit Relief in the Self Assessment foreign pages with the French notice attached. Where the French inspector reassesses the BIC profit, file an amended United Kingdom return within the domestic correction window and keep both assessments aligned: divergent profits are the fastest route to a double charge with no relief.

B. How do I challenge a refused permit, a delisting or a civil fine without missing the deadline?

Enforcement follows three separate tracks, and each has its own judge and its own clock. The commune polices registration and night caps through administrative fines (up to 10,000 euros for a missing declaration, 20,000 euros for a false one, 15,000 euros for exceeding the main-home night cap). The president of the judicial court (président du tribunal judiciaire), ruling under the fast-track procedure on the merits (procédure accélérée au fond), imposes the heavy civil fines for planning breaches: anyone who breaches the change-of-use rules faces a civil fine of up to 100,000 euros per unlawfully converted unit, namely “Toute personne qui enfreint les dispositions des articles L. 631-7 ou L. 631-7-1 A ou qui ne se conforme pas aux conditions ou obligations imposées en application des mêmes articles L. 631-7 et L. 631-7-1 A est condamnée à une amende civile dont le montant ne peut excéder 100 000 € par local irrégulièrement transformé”, together with an order to restore residential use within a fixed period and, after expiry, a periodic penalty of up to 1,000 euros per day per square metre, with enforced restoration at the offender expense. The co-ownership track runs in parallel before the civil court, which can order cessation under astreinte and damages. A single British file can therefore contain an administrative fine, a civil fine action and a co-ownership summons at once; treat them as three cases, not one.

Start with the mayoral refusal. A refusal of change-of-use authorisation or of registration must be written, reasoned and notified with the available remedies and their time limits. The standard route is a two-month challenge: first an informal reconsideration request to the mayor (recours gracieux, an application asking the authority to withdraw its decision) and/or a hierarchical appeal to the prefect where available (recours hiérarchique), then an action for excess of power before the administrative court (recours pour excès de pouvoir devant le tribunal administratif) within two months of the express refusal or of the implied refusal born of two months silence. Attack the refusal on its own grounds: error of fact (the flat was never a dwelling within the thirty-year look-back, proved by historic records or, as the statute allows, by any means of proof including old leases, tax records and planning permissions), error of law (the council applied the main-home night cap to a second home, or demanded compensation where its own deliberation exempts the district), procedural defect (no consultation of the arrondissement mayor in Paris, Marseille or Lyon, missing reasoning, file lost), and disproportionate interference with property rights and movement rights where the compensation demand makes any authorisation illusory for a small flat. Join the acknowledgement of your national declaration, the full planning file with proof of receipt, photographs of the premises, the compensation offer if any, and a bailiff report (constat de commissaire de justice) recording the actual use. Ask the judge, in the same application, for suspension (référé-suspension) where the refusal causes serious and immediate harm, for instance a season of bookings already taken that must be honoured or cancelled at great cost. Suspension requires both urgency and a serious doubt about legality; it does not authorise letting while the merits are pending unless the judge expressly so orders, so do not take new bookings on the strength of a suspension application alone.

Civil fine actions demand a different posture. The commune, the housing authority or the national housing agency summons you before the president of the judicial court, who verifies three things: that the premises were dwellings caught by the section, that you let them repeatedly for short periods to passing guests without the required authorisation, and that the amount of the fine fits the gravity, duration and profit. The case law gives you the battleground. In the Paris line validated on 18 February 2021, No. 19-13.191, the courts fined owners who had let a two-room Paris flat twice for four and six months to passing guests without authorisation, after the European Court confirmed the regime. On 15 February 2023, No. 22-10.187 (official judgment 22-10.187), the Third Civil Chamber upheld proceedings brought jointly against the owner company and the tenant company where a dwelling had been repeatedly let short-term to passing guests, recalling that both the person who changes the use and the beneficiary answer on the basis of Articles L. 631-7 and L. 651-2: the summons there stated that the city had sued owner and tenant respectively as proprietor and lessee of a dwelling “afin de les voir condamner au paiement d’une amende civile, pour en avoir changé l’usage en le louant de manière répétée pour de courtes durées à une clientèle de passage n’y élisant pas domicile”. On 13 June 2024, No. 23-11.053 (official judgment 23-11.053), the same chamber quashed in part where the Court of Appeal had misapplied the fine calibration, sending the quantum back for proper reasoning: the city had sued the owner of a merged Paris flat “afin de le voir condamner au paiement d’une amende civile, pour en avoir changé l’usage en le louant de manière répétée, pour de courtes durées, à une clientèle de passage n’y élisant pas domicile”. Your defence should therefore concede nothing automatically: dispute the dwelling character where the history supports it, dispute repetition where only one or two isolated lettings occurred, produce the authorisation or prove the exemption, and above all plead the fine downwards with accounts showing the actual profit, the short duration, the spontaneous regularisation, and the absence of any prior warning. Courts reduce fines sharply where the owner stopped at first letter and restored long-term use; they impose the maximum and the restoration order with a heavy astreinte where the owner ignored warnings and continued through platforms.

Tax reassessments follow a fourth logic that British owners often meet a year later. The inspector argues the micro-BIC was unavailable (tourist turnover above 15,000 euros), reclassifies the activity as professional, disallows depreciation, or adds late-filing surcharges and interest. Reply within the response window on the proposal (proposition de rectification, usually 30 days, extendable on request), join the SIRET registration, the filed returns, the platform annual statements, the loan and works invoices, and the depreciation schedules, and request the departmental review (recours hiérarchique fiscal) and the independent departmental commission where competent before litigating. Before the administrative court, plead documentary proof of each expense, the correct allowance rate for the correct category of letting, and the treaty position: France may tax the BIC profit but must compute it correctly, and penalties require a deliberate or repeated failure, not a first misunderstanding by a newly non-resident owner. Keep the French and United Kingdom files consistent throughout: every euro of profit conceded or defended in France moves the Foreign Tax Credit Relief in the United Kingdom by the same amount.

Two practical warnings close this enforcement section. First, limitation and proof: the commune has years to act after the breach is observed, bailiff observations and platform scrapes are admissible, and deleting adverts after receipt of the summons is treated as consciousness of breach, never as erasure. Preserve everything, including the adverts you wish you had never posted. Second, Brexit residence: paying a French civil fine or filing a French tax return gives you no right to stay beyond the 90/180-day Schengen allowance and no right to manage the lettings from France without the appropriate visa or permit if you provide services on site. Owners who clean, check in guests and maintain the flat themselves while present without a visa expose themselves to an immigration as well as a housing file. Use a local manager (conciergerie) under a written mandate, pay them by transfer, and keep the contract with the file.

Conclusion

A British owner can lawfully let a French flat furnished after Brexit, but only by respecting the order of the French gates: co-ownership compatibility first, national declaration second, mayoral change-of-use authorisation third where the flat is a second home in a tense zone, business registration and correct BIC filing fourth, visitor levy and platform transparency throughout. The fines are real, from 10,000 euros for a missing declaration to 100,000 euros per flat for an unauthorised change of use with restoration and a daily penalty thereafter, and the neighbours have their own action independent of the commune. Yet refusals and fines are not the last word: reasoned administrative appeals within two months, suspension where urgency genuinely exists, calibrated civil defences on the dwelling character, repetition and quantum, and documented tax replies all succeed where the file is complete and honest. Assemble the by-laws, the declaration acknowledgement, the planning file, the SIRET, the platform statements and the tax notices before the dispute starts, stop the disputed lettings once challenged, and argue each track before its proper judge. Managed that way, a French furnished letting remains what it should be for a British owner: a compliant income stream from a much-loved flat, not a cross-Channel dispute.