Air conditioning in French co-ownership buildings

Following the intense heat of summer 2026, many co-owners in France are considering installing air conditioning in their homes. However, the process can lead to conflicts due to co-ownership regulations, noise disturbances, concerns about building harmony, and the need for work permits.

Legal rights of co-owners

According to article 9 of the 1965 law, co-owners have the right to use and enjoy private and common parts of the building, provided they do not harm the rights of other co-owners or the building's purpose. Disputes over air conditioning installations have become common, similar to past conflicts over satellite dishes and heat pumps.

Court ruling on installation bans

The co-ownership regulation can prohibit air conditioners, but as shown by a ruling of the Court of Cassation on October 15, 2026 (no. 25-11.697), such clauses are not always clear and may lead to disputes over interpretation. In this case, the regulation prohibited installing air conditioning units on balconies and terraces that could generate noise or disturbances.

Building harmony and aesthetics

Respecting the building's harmony is another complex argument. Many co-owners believe that air conditioners will disfigure their buildings, while others view them as necessary equipment. Clauses about building harmony are often written in general terms, leaving room for interpretation and requiring judicial intervention.

Balancing individual and collective rights

Article 9 of the 1967 decree states that the freedom of some co-owners ends where the freedom of others begins. Some co-owners may oppose the installation of air conditioners due to potential neighborhood disturbances, but determining the threshold for such disturbances remains unclear. For instance, the visual impact of an air conditioner from a neighbor's balcony or terrace may be considered a disturbance by one co-owner but not by another.

Authorization requirements for installation

Most air conditioners are installed on common walls, and even if the co-owner pays for the installation, article 25 of the July 10, 1965 law requires authorization from the general meeting of co-owners. This authorization can be refused or come with strict conditions. If a co-owner installs an air conditioner without seeking authorization, the syndic can require its dismantling. Unless the co-owner pays for the general meeting, authorization may have to wait until the next general meeting, possibly in June 2027.