When you live in an apartment in Vitrolles and are considering replacing an aging convector heater with a heat pump, the first hurdle isn’t technical: it’s the co-ownership rules.
Before even requesting a quote, you need to know where the outdoor unit can go, what vote is required and which paperwork must be filed with the town hall. Installing heat pumps in a co-owned building involves two separate approval processes: one private (the co-owners’ association) and one public (the planning department). Neither depends on the other.
Condensate drainage: the technical detail co-owners often overlook
People often talk about a heat pump’s noise or appearance, but rarely about what drips from it. An outdoor unit produces condensate, sometimes several litres a day in winter. If the drainpipe empties onto the balcony below or water runs down the façade, the issue becomes a legal one before it becomes a technical one.
Condensate must be connected to a drainage system, not simply allowed to run off freely. In an apartment building, this often means connecting it to a rainwater downpipe or to a dedicated outlet specified in the technical plans. For this reason, any heat pump installation in a co-owned building in Vitrolles should be planned with a detailed drainage diagram approved by the property manager.
Failing to address this issue in advance could result in a formal notice to remedy the problem. A co-owner affected by water runoff can demand that the pipe be removed—or even that the entire installation be taken down—with financial penalties potentially imposed for non-compliance.
Co-owners’ meeting vote and planning permission in Vitrolles: two separate procedures
It’s easy to assume that a favourable vote at the co-owners’ meeting is all you need to start work. That’s a common mistake. The co-owners’ vote and planning permission are two independent procedures. One does not replace the other, and without either one, the project may be invalid—even if the other approval has been granted.
What the co-owners’ association must vote on
Any installation that changes the building’s exterior appearance or encroaches on a common area requires a vote at a co-owners’ meeting. The property manager adds the request to the agenda, along with the quote, installation plan and condensate drainage diagram.
The vote requires an absolute majority of all co-owners’ votes (Article 25 of the law of 10 July 1965). Approval is still required if the outdoor unit is installed on a private balcony but is visible from the street or another unit.
What the Vitrolles town hall may require
A prior works declaration is generally required when the outdoor unit is visible from a public space. In Vitrolles, check with the planning department whether the property is in a protected area (near a historic monument or within an ABF zone) or whether the local urban plan (PLU) imposes specific requirements for façades.
You may be exempt from filing a declaration if the installation is not visible from a public road or another building, but this exemption must be confirmed on a case-by-case basis. Assuming you are exempt without checking first could result in an official report of an infringement.
Heat pump noise in a co-owned building: document it before installation
Noise is the most common cause of disputes between neighbours after a heat pump is installed. And the manufacturer’s technical specifications won’t protect you in the event of a dispute.
The noise levels stated by the manufacturer are measured in a laboratory under standardised conditions. In real-world settings, sound reflecting off a façade, a nearby neighbour’s bedroom or the layout of an enclosed courtyard can amplify perceived noise. Recording noise levels under the actual installation conditions before commissioning is the best way to protect against a future complaint.
A few practical precautions can reduce the risk of disputes:
- Install the outdoor unit on anti-vibration mounts or a vibration-damping support to limit the transmission of vibrations to the building structure
- Point the ventilation grille towards an open space rather than a neighbour’s window, even if this makes it harder to route the refrigerant lines
- Arrange an independent acoustic assessment with an acoustician if the building has adjoining homes less than three metres from the unit
An installation approved by the co-owners’ association and compliant with the local urban plan can still be challenged in court on the grounds of an abnormal neighbourhood disturbance. Administrative approval does not protect against a civil nuisance claim.
Prepare a strong application for the property manager: the documents that make a difference
Projects are often rejected at co-owners’ meetings because of a lack of information, not because of fundamental opposition. Co-owners vote on the documents they are given, and the quality of those documents can change the outcome.
The application sent to the property manager for inclusion on the agenda should contain at least:
- A detailed quote from the installer, specifying the heat pump model, its capacity and its noise level in decibels
- A dimensioned installation plan showing the exact position of the outdoor unit in relation to common areas and neighbouring units
- A condensate drainage diagram showing the proposed connection point
- A statement confirming compliance with the co-ownership rules or, if an exemption is required, the precise wording of the resolution to be put to a vote
Including an estimate of the expected energy savings (based on the home’s energy performance assessment) can help persuade undecided co-owners. The heating project then becomes an opportunity to increase the value of the entire building, rather than just an individual improvement.
Sending the complete application to the property manager several weeks before the notice deadline helps ensure it isn’t deferred to the next co-owners’ meeting, which could delay the project by six months to a year, depending on how often meetings are held.
Whether the project involves a reversible air-to-air heat pump or an air-to-water heat pump connected to the existing heating system, the thoroughness of the initial application determines both its technical feasibility and whether neighbours will accept it. In Vitrolles, as elsewhere, a well-prepared co-owner is more likely to get the go-ahead than one in a hurry.
