Neighbour law is one of the pillars of property law in Switzerland. It regulates relations between neighbouring landowners by setting limits on the exercise of property rights where that exercise affects surrounding plots. The central provisions are found in articles 679 and 684 of the Swiss Civil Code (CC). These rules apply to all situations in which the use of a plot of land produces effects felt on neighbouring plots — whether involving noise, odours, vibrations or construction works.
The principle of excessive immissions (art. 684 CC)
Article 684 CC lays down the fundamental principle of Swiss neighbour law: every owner is required, in the use of their plot, to refrain from any excess detrimental to neighbouring owners. This obligation applies to all owners without distinction, whether they are private individuals, businesses or public authorities acting in the same capacity as private owners.
Immissions refer to external effects produced by the use of a plot of land and felt on neighbouring plots. They encompass smoke, soot, odours, noise, vibrations, radiation and similar damage. Article 684 al. 2 CC expressly mentions these categories as non-exhaustive examples.
The concept of excess is central: not all immissions are prohibited. Only those that exceed the tolerable measure according to local usage and the nature of the plots engage the owner's liability. A degree of mutual tolerance is inherent in life in society and in the coexistence of neighbouring properties.
Types of immissions
Legal doctrine and case law distinguish several categories of immissions, with differentiated protection regimes:
| Category | Examples | Protection |
|---|---|---|
| Positive (material) | Smoke, noise, odours, vibrations, artificial lights, dust, water | Protected by art. 684 CC once the excess is established |
| Negative (immaterial) | Deprivation of view, sunlight, natural light | Restrictive case law — limited protection, except by easement or extreme case |
| Ideal (aesthetic) | Visual impact, unsightly appearance of a neighbouring construction | Generally not protected by art. 684 CC |
Positive immissions — those that materially penetrate the neighbouring plot — benefit from the broadest protection. Negative immissions, which deprive the neighbour of an advantage without any substance or energy entering their plot, are only recognised as excessive in exceptional circumstances by the Federal Tribunal.
The criterion of excess
The classification of an immission as excessive within the meaning of art. 684 CC rests on an objective assessment taking into account several elements:
- Local usage: what is tolerable in an industrial zone may constitute an excess in a quiet residential neighbourhood. The land use zone designation is an important indicator.
- The nature and purpose of the affected plot: a plot intended for residential use benefits from enhanced protection against noise nuisances compared to a warehouse.
- The nature and purpose of the emitting plot: the operation of a lawfully authorised commercial activity produces immissions that may be tolerated within certain limits.
- Mutual neighbourhood tolerance: the principle that life in society entails accepting ordinary inconveniences linked to the proximity of other properties.
- Public law limit values: the thresholds set by the LPE and OPB constitute indicators, without their compliance necessarily being sufficient to exclude the existence of an excess in the civil sense.
The assessment is carried out according to an objective criterion: it is not the personal sensitivity of the affected neighbour, but the reaction that a reasonable, average owner would have in the same circumstances.
Available actions (art. 679 CC)
Article 679 CC provides the affected owner with several types of actions depending on the situation:
Action for cessation
Where the excess is current and ongoing, the affected owner may require the neighbouring owner to cease the excessive immissions. This action aims to eliminate the source of the nuisance. It does not require proof of fault: the mere reality of the excess is sufficient.
Preventive action
Where the excess has not yet occurred but is imminent — for example during ongoing works likely to cause damage — the owner may act preventively to ensure the necessary measures are taken before the damage occurs.
Action for damages
If the excessive immissions have caused harm, the affected owner may claim compensation. Art. 679 CC refers to the rules on unlawful acts (art. 41 CO). Proof of damage, causation and, in principle, fault is required to obtain damages. The market value of the plot, the diminution of enjoyment and the costs incurred to mitigate nuisances are recognised heads of damage.
Action for security
In cases where future damage is to be feared, the court may order the emitting owner to provide security to guarantee compensation for potential harm.
Distances and plantings (cantonal rules)
Federal law (CC) sets the framework for neighbour relations, but setback distances from property boundaries are governed by cantonal law, or even municipal law. Each canton has its own legislation on construction and plantings:
- Canton of Geneva: the Act on Constructions and Various Installations (LCI) and its implementing regulations set setback distances according to the land use zone. Specific rules apply to hedges, trees and fences.
- Canton of Vaud: the Act on Land-Use Planning and Construction (LATC) and municipal planning regulations determine setback distances from property boundaries and neighbouring buildings.
Distances for plantings (trees, hedges, bushes) are also defined by cantonal law. Non-compliance with these distances opens the same actions as excessive immissions: the affected owner may require the felling or trimming of the offending vegetation, subject to cantonal limitation periods.
In cases of disputes concerning legal setback distances, the relevant land use plan, zoning regulations and any applicable local development plans for the plot concerned should be consulted.
Public law rules
Civil neighbour law coexists with a body of public law rules aimed at protecting the environment and the neighbourhood:
- Federal Act on the Protection of the Environment (LPE): sets the principles of prevention and limitation of emissions at source. It applies in particular to fixed installations (businesses, roads, railways) and provides for immission limit values for noise, air and vibrations.
- Ordinance on Protection against Noise (OPB): establishes planning values, immission limit values and alarm values for different categories of noisy installations. Compliance with the OPB is monitored by the cantonal administrative authorities.
- Construction law: the building permit (construction authorisation) is issued by the competent municipal or cantonal authority and verifies the project's conformity with zoning rules, legal setback distances and noise protection requirements.
- Construction police: cantonal and municipal authorities are empowered to order compliance, or even demolition, of illegal or non-compliant constructions.
Civil avenue or administrative avenue: comparative table
| Criterion | Civil avenue (art. 679 / 684 CC) | Administrative avenue (LPE, construction law) |
|---|---|---|
| Legal basis | Swiss Civil Code (art. 679, 684 CC) | LPE, OPB, cantonal construction acts |
| Competent authority | Cantonal civil court (justice of the peace, court of first instance) | Municipality, cantonal construction service, environmental authorities |
| Object of the claim | Cessation of nuisance, prevention, damages | Compliance order, revocation or modification of permit, administrative fine |
| Conditions | Excess within the meaning of art. 684 CC (fault not necessarily required) | Violation of public law (non-compliance with authorisation, exceedance of limit values) |
| Limitation period | Prescription according to civil rules (art. 60 CO for damages) | Administrative appeal periods (often 30 days from the decision or knowledge thereof) |
| Interim measures | Yes — court may order urgent ex parte interim measures (art. 265 CPC) | Yes — authority may suspend works or order immediate measures |
| When to prefer this avenue | Damage suffered, persistent nuisance despite administrative compliance, disputes between private parties | Construction without permit, exceedance of LPE/OPB limit values, violation of zoning law |
The two avenues are not mutually exclusive: an affected owner may simultaneously act before the administrative authorities to establish an illegality and before the civil court to obtain cessation of the nuisance and compensation for the damage.
Civil procedure in neighbour disputes
Territorial jurisdiction
Actions in neighbour law fall within the jurisdiction of the civil courts at the location of the immovable property (art. 29 al. 1 CPC). The forum rei sitae applies, regardless of the domicile of the parties.
Prior conciliation
In principle, any civil action must be preceded by a conciliation attempt before the competent conciliation authority (art. 197 et seq. CPC). This step aims to facilitate an amicable settlement of the dispute. If conciliation fails, the authority issues a leave to proceed which allows the action on the merits to be brought.
Interim measures
In cases of urgency — works likely to cause immediate and irreparable damage, serious ongoing nuisance — the applicant may request interim measures, or even ex parte measures (without prior hearing of the defendant), from the competent court (art. 261 et seq. CPC). The plausibility of the right and urgency are the main conditions to be demonstrated.
Technical expertise
Neighbour disputes frequently involve technical questions (measurement of noise levels, vibration analysis, assessment of distances). The court may order a judicial expert report entrusted to an independent expert. The parties may also produce private expert reports as exhibits.
For disputes concerning easements and real rights connected to neighbour law, or questions of civil liability related to damage caused by immissions, the same rules of jurisdiction apply. Broader real estate matters, in particular those related to the purchase and sale of immovable property, may also be affected by ongoing neighbour disputes. For an overview, see the pages devoted to real estate law and civil law.
Frequently asked questions on neighbour law in Switzerland
What noise nuisances are considered excessive in Switzerland?
Art. 684 CC prohibits any excess detrimental to neighbouring plots, without setting fixed numerical thresholds for noise. The assessment is made according to local usage and the nature of the plot: what is tolerable in an industrial zone may constitute an excess in a residential neighbourhood. In parallel, the Federal Act on the Protection of the Environment (LPE) and the Ordinance on Protection against Noise (OPB) set immission limit values and planning values that may guide the civil court. Night-time noise, repeated parties, or machinery noise exceeding planning values are examples commonly examined by the courts.
What can I do if my neighbour builds without respecting the legal setback distances?
Two avenues are available. The administrative avenue allows you to report the infringement to the competent authority (municipality, cantonal construction service) so that it orders compliance or suspends the works. The civil avenue allows you to act on the basis of art. 679 CC: an action for cessation of the nuisance or for compensation for the damage caused. Setback distances from property boundaries are governed by cantonal law (cantonal construction acts, municipal regulations). It is advisable to act quickly, in particular by way of interim measures, to prevent the construction from being completed.
Can loss of sunlight be sanctioned?
So-called negative immissions — those that deprive a neighbour of an advantage (view, sunlight, light) — are subject to a restrictive regime under Swiss law. The Federal Tribunal is reluctant to find that deprivation of sunlight or a view constitutes an excess within the meaning of art. 684 CC, except in very particular cases. In general, the owner does not have a right to sunlight or to a view, unless a specific easement provides for it. Exceptions exist where the obstruction is so serious that it renders the property practically unusable.
Must I write to my neighbour before taking legal action?
The law does not formally require a prior formal notice before bringing a civil action in neighbour law. However, a written formal notice is strongly recommended: it documents the neighbour's awareness of the nuisance, demonstrates good faith on the part of the claimant, and may be sufficient to resolve the dispute without proceedings. In many cantons, conciliation is compulsory before bringing an action on the merits (art. 197 CPC). In cases of urgency — ongoing works, imminent nuisance — interim measures may be requested directly.
Which court has jurisdiction for neighbour disputes?
Neighbour law disputes fall under civil law and are within the jurisdiction of the cantonal civil courts. Territorial jurisdiction is determined by the forum of the location of the immovable property (art. 29 CPC). In most cantons, proceedings begin with a conciliation attempt before the conciliation authority. If conciliation fails, the case is brought before the court of first instance (cantonal civil court). For matters of public order (noise, pollution), the cantonal and federal administrative authorities have concurrent jurisdiction.