Termite Diagnostic Guide for French Properties

In France, the termite diagnostic (état relatif à la présence de termites et autres insectes xylophages) is essential for rural properties in areas known to be infested or at risk of termite activity.

This assessment is crucial during property transactions because it alerts potential buyers to the presence or absence of wood-boring insects that can cause major structural damage. Termites and similar pests can weaken wood and other construction materials, leading to serious structural problems or even building collapse. This diagnostic is more than a mere formality; it is vital for maintaining a property’s safety and stability.

When is a Termite Diagnostic Required?

A termite diagnostic is mandatory by law when selling a property located in an area designated as infested or at risk by a préfectural decree. This rule applies both to individual houses and the private areas of co-owned buildings.

To verify whether your property falls within an affected zone, you can check the official department maps for infested areas or contact your local préfecture or mairie. Currently, 54 departments in metropolitan France are classified as infested or at risk. 

The main affected regions include Occitanie and Nouvelle-Aquitaine in southwest France, areas along the Rhône, Garonne, and Loire rivers, and Île-de-France.

Who Can Perform the Termite Diagnostic?

A termite diagnosis must only be carried out by a certified professional. A list of certified diagnosticians is available through the Ministry of Housing’s official directory. While all listed professionals are certified, it’s recommended to verify their professional liability insurance at the time of inspection. Their impartiality and independence are also crucial; they should not have any conflicts of interest with the property owner or buyer.

During the inspection, the diagnostician must follow strict guidelines. This involves identifying the client, collecting relevant property information, and obtaining necessary authorisations. A thorough examination of all accessible areas, rooms, and volumes of the property is required, including detailed visual inspections of all wooden elements and structures, and the use of probes or sondages to detect termite activity.

The inspection report must detail the property, list visited and inaccessible areas, and identify infested versus non-infested elements. It should be dated, signed, and drafted in French using a regulated template.

If termites are found, measures to eliminate them must be implemented. However, termite treatments might not be permanent, and repeated treatments could be needed if termites reappear.

Validity & Legal Implications of the Termite Diagnostic

The termite diagnostic is valid for up to six months. If it is more than 6 months old at the time of signing the compromis de vente (preliminary sales agreement) or the acte authentique (final deed of sale), it must be redone. 

The diagnostic must be included in the Dossier de Diagnostics Techniques (DDT). While the absence of a termite diagnostic does not invalidate the sale, the buyer must be informed of its absence before purchase. If the buyer knows about termites and still proceeds, they cannot later challenge the sale legally on this basis. Sellers are responsible if they do not provide a valid termite diagnostic. 

If termites are found after the sale and were not visible during the diagnostic, the buyer can invoke the guarantee of hidden defects (garantie des vices cachés). Using an uncertified diagnostician can result in a €1,500 fine or €3,000 for repeat offences.

Termite Infestation: What to Do?

If you detect termites on your property, prompt action is essential. In France, termite infestations are a serious issue that requires swift action.

First, you must report the termite infestation to the local mairie. You are legally required to complete the Déclaration de la présence de termites (Cerfa 12010) form within one month of detection and send it by registered mail with acknowledgement of receipt.

Then, hire a certified professional to conduct a diagnostic assessment and apply appropriate treatment. Options might include fumigation, insecticide barriers, or bait traps. If your property is rented, you need to inform the landlord. For co-owned buildings, the syndic should be notified to handle shared areas.

Termite Prevention and Treatment Methods

Given termites’ biology and social behaviour, only certified professionals can ensure long-lasting protection for at-risk properties. Treatment approaches vary based on the specific situation.

For new construction in zones designated as infested, protective measures must comply with the regulations set out in articles R.112-2 à R.112-4 of the construction code dated 27 June 2006, as amended by an arrêté dated 16 February 2010. These measures primarily aim to safeguard structural wood and materials, as well as the soil-building interface.

For existing properties with termite infestations, curative treatments are designed to eradicate the termites already present. Common techniques include installing insecticide-treated barriers or bait traps.

For properties in infested zones, preventive measures are also available to guard against future infestations. Currently, the only approved method for prevention is the deployment of insecticide barriers.

Checklist for Property Buyers in Affected Areas

If you’re thinking about buying a property in a termite-prone area in France, it’s important to follow these steps to ensure your investment is secure and well-informed.

Start by confirming if the property falls within a termite-affected zone, either by checking the official map or contacting the local mairie. Ask the seller for the recent termite diagnostic report, which should be less than six months old. If it’s missing or outdated, request that the seller arrange a new inspection with a certified diagnostician.

Examine the diagnostic report thoroughly to see which parts of the property were inspected and whether termite activity was noted. If termites are present, request documentation of any treatments performed and their success. For extra reassurance, you might consider hiring an independent diagnostician for a second inspection.

Finally, consult a legal professional to understand your rights and responsibilities related to termite issues and treatments. This will help you make a sound decision and avoid legal complications later.

So whether you’re purchasing a rural home or a historic French château, it is essential to understand the legal and practical aspects of property ownership in France. For further guidance, our buying guides and our guide to home and contents insurance provide information to help you protect your investment.