France’s current acoustic rules for new residential buildings stem from an order dated 30 June 1999, according to the Ministry responsible for housing. That is a useful corrective to the sales-room assumption that a new apartment will simply be silent. A building can have an excellent specification and still put your pillow beside a place where other people start their day in ski boots.
For a second-home buyer, sound deserves its own viewing agenda. You may tolerate a little bustle during a short holiday, then discover that the same noise becomes tiring over a month. For an owner who lets the apartment, the question is also practical: can guests sleep while the rest of the residence gets moving? This is an assessment of comfort and evidence, not a prediction of rental income or a promise that any particular development has a problem.
Read the building around the bedroom
Start with the apartment plan, but ask for the floor layout around it as well. A beautifully drawn bed tells you very little about the room on the other side of its headboard. Mark the lift, staircase, entrance lobby, neighbouring apartments, service cupboards and any shared leisure facilities. Ask what sits immediately above and below the bedroom, including spaces outside the part of the building shown in the brochure.
Make this a three-direction check: beside, above and below. That is our suggested buying method, not a regulatory test. A top-floor apartment removes an upstairs neighbour from the equation, but it still merits questions about roof-mounted equipment and nearby machinery. A ground-floor home may be convenient for children and luggage; its relationship to the entrance door, garage and communal routes needs equal attention.
These are prompts for investigation, not reasons to reject a property automatically. Good design can manage awkward adjacencies. The useful response from a developer is an explanation of the construction and intended use of the adjoining space. “We have never had a complaint” is less informative, especially when the building has not yet welcomed its first resident.
Separate voices, footsteps and machinery
The Ministry’s overview of building acoustics distinguishes airborne noise, impact noise, building equipment and sound absorption in communal circulation areas. These are different questions. A conversation through a separating wall, a suitcase crossing the floor above and a ventilation system running overnight should not be bundled into one vague promise of “good insulation”.
Use ordinary descriptions when asking about your apartment. Can television sound travel from the adjoining living room? What is specified beneath hard flooring? Where are the ventilation equipment and ducts? How is the entrance door arranged relative to the sleeping area? The developer or acoustic consultant can then translate the concern into the relevant technical detail.
Resist the temptation to compare isolated decibel numbers copied from different brochures. Ask what each number measures, where it applies and whether it describes a product tested in a laboratory or the completed building. A figure without that context is an excellent way to sound informed while comparing unrelated things. If a claim is central to your purchase, ask a qualified acoustic professional to interpret it.
Also separate what you hear inside the apartment from what you hear on its balcony. You might happily accept village activity outdoors while expecting a bedroom to work well with the windows closed. Write those expectations down before choosing the unit. It makes the conversation much more precise.
Ask for the acoustic paperwork by name
Service Public’s current guidance on the completion declaration, checked for this article on 16 October 2026, identifies an acoustic attestation among the required documents for new collective residential buildings. It also lists the professionals who can establish it, including an architect, an approved technical controller or an approved design office. Ask the developer which requirements apply to the particular project and who is responsible for the document.
The French term to recognise is attestation acoustique. At reservation stage, a building still under construction cannot supply all the evidence of finished performance. That is a timing issue rather than an automatic warning sign. Request the intended process, the responsible party and the point at which the completed documentation will become available.
Keep two separate folders: promises made before purchase and evidence supplied at completion. In the first, retain the relevant specification, plans and written answers about the unit. In the second, keep the attestation and any reports actually provided. This is a suggested filing habit, not a statutory document count. It helps an overseas owner avoid searching through a year of messages when a practical question arises.
Ask what the evidence covers. Does it identify the operation, the building or your apartment? If measurements were taken elsewhere in the residence, ask how those locations were selected and what that means for the unit you are buying. A document should be read for its scope, rather than treated as a universal guarantee of the experience you will have in every room.
An energy label cannot answer the sound question
The Ministry describes RE2020 through its environmental and energy objectives, including energy consumption, construction-related carbon emissions and comfort during hot weather. Those are valuable subjects for a new-build buyer. They do not replace a specific conversation about acoustic performance.
When a salesperson answers a noise question with the energy specification, bring the discussion back to the separating wall, floor or equipment concerned. The two conversations may involve some of the same construction components, but the evidence you need is different. A warm apartment and a restful apartment are both desirable; neither adjective should stand in for the other.
Apply the same discipline to upgrade choices. If you want a different floor finish, ask for written confirmation that the proposed assembly remains appropriate acoustically, including its underlay and installation details. Do not buy a decorative finish first and assume the contractor can resolve everything underneath it later. The attractive sample on the sales desk is only the visible part of the decision.
For resale apartments, start a different evidence trail. Ask about the building’s age, subsequent alterations, flooring changes and any available reports. Do not assume that a refurbished kitchen means the building has the acoustic characteristics of a newly constructed residence. Equally, do not write off an older apartment solely because of its date: investigate the actual home and its history.
Visit when the residence has something to say
A silent building during an appointment proves only that it was silent during that appointment. For a completed property, try to arrange a second visit at a different time, with the owner’s or agent’s agreement. An arrival period and an ordinary evening may answer different questions. Ask residents about patterns, while remembering that one person’s account is useful context rather than a technical report.
Set aside ten minutes of a viewing simply to listen. This is a practical suggestion, not a compliance procedure. Stop talking, put the sales presentation away and spend some of that time in the bedroom. Where permitted, compare windows open and closed. Notice recurring equipment noise, doors, voices and activity outside. Record the time, room and conditions so that your notes remain useful afterwards.
Never present a phone reading as proof that a building passes or fails an acoustic standard. If a sound matters to the purchase, professional assessment is the stronger next step. Nor should you arrange intrusive experiments in a neighbour’s home. Ask the developer how a concern can be investigated properly and with permission.
For off-plan purchases, acknowledge the limit: you cannot listen to an apartment that does not exist yet. A visit to another completed scheme can help you discuss workmanship and expectations, but it cannot establish the performance of the future unit. Give more weight to the project-specific plans, specification and written answers.
Put comfort into the investment calculation
There is no rental premium or resale uplift assumed here. Acoustic comfort belongs in an investment discussion because it affects how a home can be used and what questions you should investigate before committing. A family using the property during school holidays may have different priorities from a couple planning longer stays or an owner accepting frequent short bookings.
Consider a deliberately fictional choice: Apartment A is beside the principal entrance, while Apartment B has a more sheltered bedroom position and costs €12,000 more. That amount is an illustration, not a DOMOSNO asking-price comparison. You cannot conclude that B is better value without examining the construction, layout, other differences and your budget. You also cannot justify the extra cost with an invented increase in nightly rent.
Instead, ask what the additional expenditure buys in terms you can verify. Perhaps it buys a preferred position; perhaps the larger price reflects a view or floor area rather than sound. Keep each benefit separate. This makes it easier to compare homes without paying twice, mentally, for the same appealing feature.
If you intend to let, ask a prospective manager how they would describe the apartment accurately and handle a guest’s noise concern. Avoid promising silence in marketing copy. A clear account of the property and sensible house information is more useful than an adjective that no one can reliably deliver.
Leave the viewing with answers, not adjectives
Before reserving, aim to resolve the bedroom’s surroundings, the relevant construction specification and the route to completed acoustic evidence. Where an answer remains pending, record who will provide it and when. If the answer could change your buying decision, seek the appropriate technical or legal advice before making a commitment that assumes the matter is settled.
At handover, keep factual notes about anything you notice and raise concerns promptly through the agreed process. Describe the sound and circumstances rather than diagnosing its cause yourself. An intermittent hum at night and footsteps during an occupied weekend may need different investigations. A short, precise record gives the professional dealing with it something useful to work from.
A ski apartment should suit the hours when you are not skiing as well as the ones when you are. If you are comparing new-build options, ask DOMOSNO to help obtain the plans and specification for your shortlist, including the less photogenic details around the bedroom.
