You return from abroad to your flat in Paris or your house in the Île-de-France and discover that the neighbour has extended his building over your boundary, or that a new wall now blocks the windows that gave your living room its light and its view. For a foreign owner who does not live on site year-round, the shock is quickly followed by practical questions: can you force the neighbour to demolish what he built on your land, can you obtain compensation for the light and view you have lost, who in your household is entitled to sue, how fast must you act, and how do you run a court case from another country.
French law answers these questions with two distinct weapons that are often confused. The first is the law of ownership itself: no one may build on another person’s land, and the victim of an empiètement (encroachment) can demand demolition as of right. The second is the law of abnormal neighbourhood disturbance, the trouble anormal de voisinage (abnormal neighbourhood disturbance), now codified in Article 1253 of the Civil Code, which compensates and stops disturbances that exceed the ordinary inconveniences of neighbourhood life, such as a radically blocked view or lost sunlight. Each weapon has its own conditions, its own proof and its own case law, and choosing the wrong one is the most frequent and the most expensive mistake. This guide explains both, with the 2025 and 2026 rulings of the Third Civil Chamber of the Court of Cassation that foreign owners need to know, and the Paris procedure for acting quickly, including from abroad.
For the general framework of neighbourhood nuisance claims and defences, readers may also consult our 2026 guide to abnormal neighbourhood nuisance claims and defences for foreign owners, which this article completes with the specific case of physical encroachment and lost light. Owners facing a boundary or construction dispute in Paris can instruct counsel through our Paris real estate law practice for representation before the Paris courts.
I. Your neighbour’s works crossed the line: encroachment and lost light
A. Encroachment on your land: demolition as of right
French ownership is defined in absolute terms. Article 544 of the Civil Code states (official text): “La propriété est le droit de jouir et disposer des choses de la manière la plus absolue, pourvu qu’on n’en fasse pas un usage prohibé par les lois ou par les règlements.” This means that ownership is the right to enjoy and dispose of things in the most absolute manner, provided no use is made of them that is prohibited by laws or regulations. The direct consequence is that a neighbour who builds, even by a few centimetres, on your parcel infringes the very substance of your ownership, and French courts draw a radical conclusion from that: you can demand the demolition of the encroaching structure, and the author of the encroachment cannot escape by arguing that demolition would be disproportionate.
Article 545 of the Civil Code reinforces this protection (official text): “Nul ne peut être contraint de céder sa propriété, si ce n’est pour cause d’utilité publique, et moyennant une juste et préalable indemnité.” This means that no one can be forced to give up his property except for public utility and with fair prior compensation. A private neighbour is therefore never entitled to force you to sell him the strip of land he has occupied, whatever the size of the encroachment and whatever the cost of demolition may be for him.
The Court of Cassation confirmed this firm line on 3 July 2025 in a widely noted ruling (Third Civil Chamber, pourvoi No. 23-12.925, partial cassation, official text). In that case, neighbours had built a dwelling partly on someone else’s parcel, an encroachment of about 4.65 square metres on a plot of 1,622 square metres, erected under a planning permission and before the victim had acquired her land, with two living rooms of the offenders’ own home standing on the disputed strip. The court of appeal had refused demolition after weighing the small surface against the offenders’ right to respect for their home. The Court of Cassation quashed that reasoning and restated the principle: “tout propriétaire est en droit d’obtenir la démolition d’un ouvrage empiétant sur son fonds, sans que son action puisse donner lieu à faute ou abus.” This means that every owner is entitled to obtain the demolition of a structure encroaching on his land, and that bringing such an action can never itself be treated as fault or abuse. The ruling adds that the author of an encroachment cannot hide behind the European Convention on Human Rights where his own construction disregards the victim’s right to respect for her property, and that expulsion and demolition, being the only measures capable of restoring the owner to the fullness of her right, cannot be regarded as disproportionate given the gravity of the interference with ownership.
Three practical lessons follow for a foreign owner. First, the size of the encroachment does not matter: a few centimetres of wall footing, a roof overhang, an insulation layer or a fence set on your side of the boundary all qualify, and the neighbour’s good faith, his planning permission and the fact that the encroachment predates your purchase do not extinguish your demolition claim. Second, you do not have to prove any fault or any personal loss to obtain demolition: the mere material fact of the trespass on your parcel suffices, which makes the action far simpler than a nuisance claim. Third, demolition and damages can be combined: on top of recovering the fullness of your land, you can claim compensation for the loss of use and any depreciation suffered while the encroachment lasted, assessed by the trial judges on evidence such as a surveyor’s report and, where relevant, an estate agent’s valuation.
Before going to court, the boundary itself must be established with certainty, because everything turns on where exactly the dividing line runs. Article 646 of the Civil Code provides (official text): “Tout propriétaire peut obliger son voisin au bornage de leurs propriétés contiguës.” This means that any owner can compel his neighbour to participate in the formal boundary marking of their adjoining properties, with the costs shared. The bornage (formal boundary marking) is carried out by a géomètre-expert (licensed surveyor), preferably agreed between the parties and recorded in a signed boundary report, or ordered by the court if the neighbour refuses. For a non-resident owner, commissioning a surveyor early is the single most cost-effective step: a precise plan showing the overlap, annexed to a formal demand letter, often produces a settlement without trial, and if proceedings become necessary, the judge will in any event rely on survey evidence. Keep the title deeds, the development plans, the planning file of the neighbour’s works and dated photographs, and have a bailiff record the state of the site, because the encroacher sometimes hurries to complete or conceal the works once he receives a complaint.
B. Blocked views and lost sunlight: proving an abnormal disturbance
Where the neighbour’s construction stays on his own land but blocks your windows, takes your light or destroys the view for which you paid, demolition as of right is no longer available: there is no trespass on your parcel. The remedy then lies in abnormal neighbourhood disturbance, now codified since the reform that entered into force on 17 April 2024 in Article 1253 of the Civil Code. The first paragraph of that article, in its version verified as in force on 2 October 2026 (official text), holds strictly liable the owner, tenant, gratuitous occupant, beneficiary of an occupation title, developer or person exercising the developer’s powers who causes a disturbance exceeding the ordinary inconveniences of neighbourhood life, without the victim having to prove any fault. Liability is therefore established by comparing the disturbance suffered with what is normally tolerable between neighbours, and compensation follows once abnormality is demonstrated. The same article preserves a defence for pre-existing activities that comply with the laws and regulations and have continued in the same conditions: a buyer who knowingly settles next to a long-standing compliant activity cannot easily complain of it afterwards, subject to any aggravation of the disturbance.
Loss of view and loss of sunlight are classic examples, and two 2025 and 2026 rulings show exactly how judges reason and where claims fail. On 27 March 2025, the Third Civil Chamber ruled in a case where neighbours complained that an extension built under a 2001 planning permission had cut their sunlight and their view (pourvoi No. 23-21.076, partial cassation, official text). The court of appeal had found an abnormal disturbance simply because the distance between the buildings had shrunk from about 7.6 metres to 4 metres, significantly restricting the view from the balconies and affecting enjoyment and property values. The Court of Cassation quashed on damages: the judges should have examined, as the builder requested, “si l’urbanisation de la zone où se trouvaient les immeubles n’était pas de nature à écarter l’existence d’un trouble anormal”, that is, whether the urban character of the area was itself capable of excluding any abnormal disturbance. The lesson is central for Paris and the inner suburbs: in a dense urban setting, residents must tolerate a degree of overlooking, shade and construction that would be abnormal in the countryside, so a foreign owner complaining of lost light in Paris must prove with measurements, photographs, expert evidence and comparative valuations that the loss goes clearly beyond what city life normally entails, rather than relying on the mere fact of a diminished view.
The second ruling, given on 18 June 2026, concerns a Paris dispute in which a property company complained that works on the adjoining parcel had blocked two sixth-floor windows (pourvoi No. 25-11.778, cassation, official text). The court of appeal had thrown the claim out as inadmissible because the company could not prove that its windows complied with planning rules or that it had acquired a view easement by prescription. The Court of Cassation quashed: “l’intérêt à agir n’est pas subordonné à la démonstration préalable du bien-fondé de l’action”, meaning that standing to sue is not conditional on proving the merits of the claim in advance, and showing the abnormal character of the disturbance goes to success, not admissibility. For claimants, the message is encouraging: a court cannot close the door at the threshold by demanding upfront proof of legality or easement; those questions belong to the merits. But the message cuts both ways, because the merits still require full proof: legality of the openings, absence of a pre-existing compliant activity, reality and abnormality of the loss, and quantification of the damage remain for the claimant to establish, typically through a court-appointed expert.
Concretely, a foreign owner who has lost light or view should assemble the same file as for encroachment, plus evidence specific to disturbance: the notarial deed and any view premium paid, before-and-after photographs taken from identical angles, sunlight measurements or expert assessment of insolation loss, an estate agent’s opinion quantifying depreciation, and testimony from the building manager or neighbours about the change. A formal notice giving the neighbour a short deadline to propose a solution, such as lowering a parapet, replacing an opaque fence with openwork, or compensating the loss, is both a legal precaution and a negotiation lever, and it demonstrates good faith if the judge later assesses costs. Where the neighbour’s structure itself breaches planning rules, a parallel challenge to the planning permission or a report to the mayor’s urban-planning department can strengthen the civil case, though the civil judge assesses abnormality independently of planning legality.
II. Enforcing your rights from abroad: standing, time limits and emergency action
A. Who can sue and how long you have
French courts interpret standing in neighbourhood cases generously, and two recent rulings directly benefit foreign households. The action for abnormal neighbourhood disturbance is an extra-contractual liability action, independent of any fault, which allows the victim to claim against the owner of the property causing the disturbance, who is liable as of right. Standing follows the harm, not the title deeds. On 20 November 2025, the Third Civil Chamber held that the wife of the owner-occupier could claim in her own name for the disturbance she personally suffered (pourvoi No. 24-16.342, partial cassation without referral, official text). The court stated that a spouse claiming to be the victim of an abnormal neighbourhood disturbance has standing to seek compensation from the owner of the property at the origin of the trouble, “peu important que le domicile qu’il occupe appartienne à son conjoint”, meaning that it does not matter that the home occupied belongs to the spouse. Any occupant, whatever the basis of occupation, spouse, partner, child, tenant or any other resident family member, can therefore claim for his or her own loss of enjoyment, and each victim’s damages are assessed individually. Combined with the June 2026 ruling on admissibility, the position is now clear: courts cannot demand threshold proof of ownership, personal occupation title or easement before hearing the claim.
For owners holding through a société civile immobilière (non-trading property company), the position is equally favourable: the company, as owner, sues for the harm to its asset, including loss of rental value and depreciation, while the occupying family members sue in parallel for their personal loss of enjoyment. Tenants, for their part, can claim for disturbance to their quiet enjoyment against the neighbouring owner as well as, where relevant, against their own landlord. From a practical standpoint, the household should coordinate: one set of proceedings, one expert assessment, with each claimant’s head of loss separately itemised, avoids contradictory findings and duplicated costs.
Time limits are strict and deserve close attention from non-residents who discover the problem late. Article 2224 of the Civil Code 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.” This means that personal actions are time-barred after five years running from the day the holder of the right knew, or should have known, the facts enabling him to sue (official text). For neighbourhood disturbance, the Court of Cassation clarified on 2 July 2026, in litigation between a long-settled resident and industrial operators, that “le point de départ de la prescription de l’action pour trouble anormal de voisinage était le jour de la première manifestation du trouble, ou le jour de sa révélation au titulaire du droit, ou de son aggravation”, meaning that time starts on the day of the first manifestation of the disturbance, or the day it is revealed to the right-holder, or the day it worsens (pourvois Nos. 24-19.569, 24-20.027 and 24-20.075 joined, rejection, official text). A foreign owner who bought after the works were completed, or who visits only occasionally, therefore benefits from a revelation-based starting point where the harm was genuinely concealed, for example hidden damp from an encroaching structure or pollution discovered through a later study, but cannot sleep on visible facts: a wall blocking the windows is manifest from the first visit, and the five years run from when the owner knew or should have known. Aggravation restarts the analysis for the worsened part. The demolition action for encroachment, grounded in the perpetual right of ownership under Articles 544 and 545 of the Civil Code (official text and official text), is not subject to the same five-year logic in its negatory dimension, but any accompanying damages claim is, so acting promptly protects both limbs in every case.
B. Paris procedure: emergency orders, injunction, damages
When the works are ongoing or the harm is acute, waiting for a full trial on the merits is not the only option. Article 835, paragraph 1, of the Code of Civil Procedure allows the president of the judicial court, ruling in référé (emergency interim proceedings), to order even disputed protective or restoration measures to stop a manifestly unlawful disturbance. On 27 February 2025, the Third Civil Chamber illustrated the mechanism: a neighbour invoked the emergency judge against an ongoing encroachment-like interference with her property (pourvoi No. 23-22.284, cassation, official text). The Court recalled that the emergency judge “peut prescrire en référé les mesures conservatoires ou de remise en état qui s’imposent pour faire cesser un trouble manifestement illicite”, meaning that he can order in interim proceedings the protective or restoration measures required to bring a manifestly unlawful disturbance to an end (see the Code of Civil Procedure, official text). An encroachment documented by a surveyor’s plan is the textbook example of a manifestly unlawful disturbance: no serious legal debate can justify building on someone else’s land, so the emergency judge can order work to stop, order removal under a daily penalty, the astreinte (daily penalty payment for non-compliance), and appoint an expert to record the situation, all within weeks rather than months. For pure loss of view without trespass, emergency relief is harder because abnormality is debatable, but the judge can still order an expert assessment in référé to freeze the evidence before memories fade and the site changes.
On the merits, the remedies available before the Paris judicial court combine restoration and compensation. For encroachment: demolition and restoration of the site, routinely backed by an astreinte per day of delay, plus damages for loss of use, depreciation and moral harm where established. For abnormal disturbance: an injunction to cease or reduce the disturbance, for example lowering, screening or reorienting the offending structure, works to restore light, or restrictions on the offending use, again under penalty, plus damages covering loss of enjoyment over the disturbance period, any capital depreciation of the property, and costs of expert reports and bailiff records. French courts do not award punitive damages: every euro must correspond to a proven head of loss, which is why the expert valuation and the itemised claim schedule prepared by counsel matter more than indignation. Offers and correspondence should be preserved, because a claimant who refused a reasonable settlement can face costs consequences, while a neighbour who ignored a formal notice exposes himself to full costs and, where proceedings were plainly necessary, to damages for abusive resistance under the general liability rule of Article 1240 of the Civil Code, which states: “Tout fait quelconque de l’homme, qui cause à autrui un dommage, oblige celui par la faute duquel il est arrivé à le réparer.” This means that any act whatever of man which causes damage to another obliges him by whose fault it occurred to repair it (official text).
Running the case from abroad is entirely feasible if organised early. Proceedings on the merits before the judicial court require representation by an avocat (attorney), who can receive notifications electronically, represent the client at hearings and coordinate the expert. A non-resident claimant gives a power of attorney, provides certified copies of title and identity, designates a French address for service at counsel’s office, and follows the expert meeting by written submissions, attending in person only when the expert or the court genuinely requires it. In Paris, first-instance neighbourhood cases are heard by the Paris judicial court, with emergency applications typically decided within weeks; appeals go to the Paris Court of Appeal, and the losing party generally bears the court costs plus a contribution to the winner’s legal fees under Article 700 of the Code of Civil Procedure. Practical Paris specifics help: instruct a Paris-registered surveyor and bailiff quickly, because site evidence disappears as works progress; check the planning file at the relevant arrondissement town hall or the Paris urban-planning department to verify the neighbour’s authorisations; and if the property is held in copropriété (co-ownership), involve the syndic (managing agent) and the general meeting early, since works affecting common parts or the building’s exterior require collective authorisation and the co-ownership association may itself have standing. Foreign owners should also notify their French comprehensive home insurer, the assurance multirisque habitation (comprehensive home insurance), which sometimes includes legal-protection cover that funds the surveyor, the bailiff and part of counsel’s fees, and diarise the five-year limitation strictly from the first visit at which the works or their effects were visible.
Conclusion
A neighbour who builds on your land and a neighbour who takes your light are two different legal problems, and French law treats them accordingly. Encroachment on your parcel gives you the strongest weapon in the litigation arsenal: demolition as of right under Articles 544 and 545 of the Civil Code, confirmed by the Court of Cassation on 3 July 2025, without proof of fault and without any proportionality defence available to the builder. Loss of view or sunlight, where nothing crosses the boundary, must be pursued as an abnormal neighbourhood disturbance under Article 1253: strict liability without fault, but full proof of abnormality measured against the ordinary inconveniences of the neighbourhood, with urban density in Paris setting a demanding threshold confirmed on 27 March 2025. In both cases, standing is broad, each occupant claiming his own loss, threshold defences fail, as confirmed on 18 June 2026 and 20 November 2025, time runs for five years from knowledge or revelation, as clarified on 2 July 2026, and the emergency judge can intervene within weeks against manifestly unlawful works, as recalled on 27 February 2025. For the foreign owner, the method is therefore simple: have the boundary surveyed at once, freeze the evidence by bailiff and expert, send a precise formal notice, and file the right action before the right judge without delay. Light, view and land are the durable components of a French property’s value; the law protects them firmly, but only the diligent owner collects.