Noise and Neighbours in Portugal in 2026: A Practical Guide to the Regulamento Geral do Ruído, the 23:00 to 07:00 Rule, When Building Work Is Banned, and How to Make a Complaint Count

Almost every foreign resident in Portugal eventually has the same conversation. A neighbour is drilling at eight in the morning on a Saturday, or the bar downstairs has put its speakers on the terrace, or the flat above has become a short-term rental with a rolling cast of stag parties. Someone says "there must be a law". There is. It is Decreto-Lei n.º 9/2007, which approved the Regulamento Geral do Ruído (General Noise Regulation), and it is more useful, and more specific, than most people realise.

This guide sets out what the law actually says, what the police can and cannot do when you call them, when building work is banned outright, what a licença especial de ruído is and who needs one, what the fines look like, and how to make a complaint that produces a result rather than a shrug.

First, the three time periods

The regulation divides the day into three reference periods, and almost every rule in it hangs off one of them:

• Daytime (período diurno): 07:00 to 20:00
• Evening (período do entardecer): 20:00 to 23:00
• Night (período nocturno): 23:00 to 07:00

Note what this is not. There is no general legal "quiet hours" window in Portugal running from, say, 22:00 to 08:00, of the kind some other European countries have. What exists instead is a set of different rules that switch on at different times, and the building-work rules use different hours again. Getting these straight is most of the battle.

Neighbour noise: what the police can actually do

The regulation has a specific category for household noise. "Ruído de vizinhança" is defined as noise associated with residential use and the activities inherent to it, produced directly by someone or through another person, by a thing in their keeping or by an animal under their responsibility, which "by its duration, repetition or intensity is capable of affecting public health or the tranquillity of the neighbourhood".

Read that definition closely, because three things follow from it.

There is no decibel threshold. Nowhere does the law say neighbour noise becomes illegal at 45 dB(A) or any other number. The test is duration, repetition or intensity, judged in context. You do not need a sound-level meter, and no one is going to arrive with one.

It covers dogs. "An animal under their responsibility" is explicit. A dog barking all night is ruído de vizinhança in exactly the same way a party is.

The police have two different powers, depending on the hour. Under article 24, between 23:00 and 07:00 the police "may order the producer of neighbourhood noise to adopt the appropriate measures to cause the nuisance to cease immediately". Between 07:00 and 23:00 they may instead "set a deadline" for the nuisance to stop.

That is the practical difference between calling at midnight and calling at six in the evening. At night, the officer can require the music off now. During the day, the officer can require it fixed by a stated time. Both are lawful orders, and disobeying either is a punishable offence in its own right under article 28.

Building work: the rule almost everyone gets wrong

This is where most disputes start, and where the law is unusually clear.

Article 14 covers "temporary noisy activities", which includes civil construction works, sporting events, shows, festivals and markets. Near residential buildings, these are prohibited on Saturdays, Sundays and public holidays, and on weekdays between 20:00 and 08:00. They are also prohibited near schools during school hours, and near hospitals and similar establishments at any time.

Article 16 covers works inside buildings. Recovery, remodelling or conservation works inside buildings used for housing, commerce or services that are a source of noise "may only be carried out on working days, between 08:00 and 20:00", and they do not require a special noise licence. The person responsible for the works must also post, somewhere accessible to the building's users, the expected duration of the works and, where possible, the hours of heaviest noise.

So: no drilling on Saturday. No drilling on Sunday. No drilling on a public holiday. No drilling before 8am or after 8pm on a weekday. And your neighbour is supposed to have put a notice up in the hallway before starting.

The single exception is article 17: urgent works. Works in public spaces or inside buildings that must be carried out urgently "to avoid or reduce the danger of damage to persons or property" are not subject to any of these limits. A burst pipe at two in the morning is not a breach of the regulation.

What happens when works run outside the hours

Article 18 is the enforcement clause and it is stronger than most residents expect. Temporary noisy activities and works inside buildings carried out in breach of articles 14 to 16 "are suspended by order of the police authorities", either on the authorities' own initiative or at the request of an interested party. The officers must then draw up a formal record of the occurrence and send it to the president of the câmara municipal (municipal council) so that administrative-offence proceedings can be opened.

Two things matter here. The police can stop the work on the spot; they do not need to refer it upward first. And the paperwork is not optional: the auto goes to the câmara, which is the body that processes the fine.

The licença especial de ruído

Article 15 provides the escape valve. Activities otherwise banned by article 14 can be authorised "in exceptional and duly justified cases" by a licença especial de ruído (special noise licence) issued by the municipality, which sets the conditions.

If you are the one who needs one, the requirements are specific. The application must be made at least 15 working days before the activity starts, and must state the exact location or route, the start and end dates, the hours, the reasons justifying the activity at that place and time, the proposed noise prevention and reduction measures where applicable, and any other relevant information.

Two further points are worth knowing:

• Licences longer than a month carry hard limits. Where a licence is issued for more than one month, it is conditional on respecting, at sensitive receivers, an ambient outdoor limit of 60 dB(A) in the evening period and 55 dB(A) at night. Below a month, no numeric ceiling is imposed by this article.
• The municipality does not need to license itself. A temporary noisy activity promoted by the municipality itself needs no licence, though it is still bound by those same 60 and 55 dB(A) limits. This is why a council-run festival can run late in a residential square when a private one could not.

Street parties, public entertainment and noisy shows in public places near homes are also governed by Decreto-Lei n.º 310/2002, which the 2007 regulation amended. These are permitted only when exceptional circumstances justify them, a special noise licence has been issued by the câmara president, and the article 15 limits are respected. Continuous operation near hospitals, or near schools during school hours, is not permitted at all.

Noise licences are public administrative acts. Some municipalities publish them, which is how residents' groups track saturation in nightlife districts. Lisbon's licence data has been mapped by residents in exactly this way. If you are fighting a recurring problem, asking your câmara for the licences issued for a given address is a legitimate and often productive request.

Bars, restaurants and other permanent noisy activities

A business that makes noise as a matter of course is a "permanent noisy activity", and it faces two separate tests under article 13.

The exposure limits. Under article 11, a mixed-use zone must not be exposed to outdoor ambient noise above 65 dB(A) on the day-evening-night indicator and 55 dB(A) at night. A sensitive zone, meaning one designated in the municipal plan for housing, schools, hospitals or leisure, has stricter limits of 55 dB(A) and 45 dB(A). Where a municipality has not yet classified its zones, the fallback limits are 63 dB(A) and 53 dB(A).

The nuisance criterion (critério de incomodidade). This is the one that catches most bars. It measures the difference between ambient noise while the business is operating and residual noise without it. That difference may not exceed 5 dB(A) in the daytime period, 4 dB(A) in the evening and 3 dB(A) at night.

Three decibels at night is a small margin. It is why a bar that is comfortably within the absolute limits can still be in breach: what matters is how much it adds to the background.

There is a carve-out. The nuisance criterion does not apply where ambient noise outdoors is 45 dB(A) or lower, or 27 dB(A) or lower inside the receiving rooms. In very quiet locations the absolute floor takes over, so a business cannot be pursued simply for existing in near-silence.

Municipalities also have a sharpening power under article 11(5): in delimited areas of sensitive or mixed zones, "namely in historic centres", they may set limits 5 dB(A) below the national ones. If you live in a protected old-town area, check your municipal noise regulation, because the numbers that apply to you may be stricter than the national ones.

Vehicles, alarms and the things people forget

• Car alarms. It is prohibited to use vehicle alarm systems without a mechanism ensuring the alarm does not run for more than 20 minutes. Police may remove a parked vehicle whose alarm has been sounding continuously or repeatedly for more than 20 minutes. This is one of the few noise rules with a hard number attached, and it is enforceable by towing.
• Exhausts and modified vehicles. Circulating with a vehicle whose overall operating noise level exceeds the value recorded in the livrete (vehicle registration document), allowing a tolerance of 5 dB(A), is prohibited. Noise is checked at the periodic vehicle inspection.
• Night flights. At aerodromes not covered by the separate aviation-noise regime, landings and take-offs by civil aircraft are prohibited between 00:00 and 06:00 except by force majeure.
• Building alarms. Alarm systems installed in buildings fall under a separate law, Decreto-Lei n.º 297/99, not under the noise regulation.

How to complain, in order

1. Talk to the neighbour first, if you safely can. Unglamorous, but a large share of these disputes are about someone not knowing the hours rather than not caring. If the problem is renovation works, pointing at article 16 and the missing notice in the lobby is often enough.

2. Call the police for anything happening now. The PSP in cities, the GNR elsewhere. Ask specifically for an officer to attend and for an auto de ocorrência (occurrence report) to be drawn up. This is the step people skip, and it is the one that matters: the auto is the document that starts the administrative-offence file at the câmara. Note the number of the report.

3. Complain in writing to the câmara municipal. The municipality is the competent authority for processing offences involving temporary noisy activities and neighbourhood noise, and its municipal police and inspection services also have enforcement powers. Put it in writing, attach the auto reference, and give dates, times and duration. A log kept over several weeks is far more persuasive than a single angry email.

4. For a licensed business, go to the licensing authority as well. Compliance with the noise rules is checked as part of the licensing procedure, so a persistent breach is a licensing problem, not only a noise problem. The Inspeção-Geral do Ambiente e do Ordenamento do Território (Environment and Spatial Planning Inspectorate) and the regional coordination commission (CCDR) also have inspection powers.

5. If measurements are needed, they must be done properly. Acoustic tests and measurements required to verify compliance must be carried out by accredited entities, using metrologically controlled instruments. A recording on your phone is useful evidence of duration and pattern, but it is not an acoustic assessment and will not stand in for one.

6. Keep the civil route in mind. The administrative process fines the offender; it does not compensate you. Articles 70 and 1346 of the Código Civil (Civil Code) protect personal integrity and limit emissions of noise onto neighbouring property, and a civil action can seek both an order to stop and damages. It is slower and costs money, but it is independent of whether the câmara ever issues a fine.

What the fines are

Noise offences are environmental administrative offences, and the amounts come from the framework law, Lei n.º 50/2006. The regulation sorts breaches into two classes.

Light offences (contraordenação ambiental leve) include running a temporary noisy activity without a special noise licence or outside its conditions, carrying out works inside a building outside the permitted hours, failing to post the works notice, failing to comply with a police suspension order, misusing a vehicle alarm, and failing to comply with a police order to stop neighbourhood noise. The coimas are:

• Individuals: €200 to €2,000 for negligence, €400 to €4,000 where intent is found.
• Companies: €2,000 to €18,000 for negligence, €6,000 to €36,000 where intent is found.

Serious offences (contraordenação ambiental grave) include installing or running a permanent noisy activity in breach of the exposure limits or the nuisance criterion, running one at all in a sensitive zone, and failing to comply with precautionary measures. The coimas are:

• Individuals: €2,000 to €20,000 for negligence, €4,000 to €40,000 where intent is found.
• Companies: €12,000 to €72,000 for negligence, €36,000 to €216,000 where intent is found.

Negligence and attempt are punishable, with the minimum and maximum halved. Inspection bodies may also order precautionary measures, which can go as far as suspending the activity, preventively closing the establishment or seizing equipment. For serious offences, a conviction can be published where the fine imposed exceeds half the applicable maximum.

If you live in a condomínio

Flat-dwellers have a second layer of rules on top of the national ones. The building's constitutive title and the resolutions of the assembleia de condóminos can restrict activities beyond what the law requires, and the administrador is the person who enforces them. If the noise comes from another flat in your building, raising it at the assembly and having it minuted creates a record that is useful in both the administrative and the civil route. Our guide to living in a condomínio sets out how those powers work.

Short-term rentals sit in an awkward gap: the guests change every few days, so there is rarely a persistent "producer of noise" to serve an order on. The practical route there is the establishment itself, through the câmara, rather than the individual guests.

What This Means for You

• If you are renovating a flat: weekdays only, 08:00 to 20:00, and put a notice in the lobby before you start. You do not need a licence for interior works, but you do need to keep to the hours, and your builders may not know that.
• If you have just moved in and the neighbours are loud: log everything with dates, times and duration for two or three weeks before you escalate. The single most common reason complaints fail is that they describe a feeling rather than a pattern.
• If you are viewing a property: ask which zone it sits in under the municipal plan. Sensitive zones carry limits ten decibels stricter than mixed zones, and a flat above a commercial strip in a mixed zone has far less legal protection than the estate-agent photographs suggest.
• If you run a bar, restaurant or shop: the number that will catch you is the nuisance criterion, not the absolute limit. Three decibels above background at night is a narrow margin, and the assessment is done by an accredited entity at the neighbour's window, not at your door.
• If you are organising an event: apply for the licença especial de ruído at least 15 working days ahead. Applications filed late are refused on timing alone, and running the event anyway is a light environmental offence with a fine attached.
• If nothing is working: the administrative route and the civil route are separate. A câmara that will not act does not block a civil action under the Civil Code, and the two can run in parallel.

The Regulamento Geral do Ruído has been in force since 2007 and has been amended only lightly since. That stability is an advantage: the hours have not moved, the categories have not moved, and the fines have been on the same scale since 2015. Most noise disputes in Portugal are lost not because the law is weak but because the complainant never got the auto de ocorrência written, and so never started the file that the law is built around. Start there.