Real estate diagnosis: asbestos condition or "asbestos diagnosis"
Verified 16 October 2026 - Public Service / (Prime Minister)
The asbestos status indicates whether or not a built building contains building materials and products containing asbestos. This document must be completed in case of sale of a dwelling whose building permit was issued before 1er july 1997. It must be given to the future purchaser to inform him of the presence or absence of asbestos. We're taking stock of the regulations.
You must have an asbestos diagnosis in case of sale of a detached house whose building permit has been issued before 1er july 1997.
This obligation applies to both individuals and legal persons owners of real estate.
Diagnosis should be made by a diagnoser responding to certain criteria, including certification.
It is possible to use a directory to search for a certified diagnoser:
Search for a certified real estate diagnoser or check the certificates of its diagnoser
The cost of asbestos diagnosis is not regulated : the price may therefore vary from one professional to another.
This cost is borne by the owner-seller.
The diagnoser must identify materials and products of List A and List B.
The asbestos diagnosis covers materials and products visible and accessible at the time of identification.
This identification gives rise to a report.
You need to build a folder called Asbestos - Private Parts File (DAPP) , which includes this report.
In addition, this dossier must include information on the health risks and the need to intervene in the event of abnormal wear or degradation of materials containing asbestos.
FYI
The syndicate of co-owners must also constitute a file called Asbestos Technical File (DTA) for common areas from the building. This file includes a material and product tracking report of List A and List B and a DTA summary sheet. You must ask the syndic of co-ownership a copy of this dossier and its summary sheet. In case of sale of a condominium lot, the purchaser must be informed of the possible presence of asbestos in the common areas of the building. Information on the common areas can be found in the DTA.
The diagnoser gives you the different reports.
You must integrate these reports into the technical diagnostic record (DDT).
You must give the DDT to the purchaser at the time of signing the promise to sell or, in its absence, at the time of signing the authentic deed of sale.
Warning
Where an asset is derived from division of a building, the asbestos diagnosis must be carried out before its sale.
Depending on the state of preservation of materials or products containing asbestos, the report of the trader may provide for the following measures:
- Periodic evaluation the state of preservation of materials or products containing asbestos. When materials from List A are classified for periodic monitoring, a new assessment must be carried out within a maximum period of 3 years. For list B materials, the regulations do not set mandatory periodicity (monitoring depends on their condition and any deterioration observed).
- In-depth risk analysis, in particular by means of air samples to determine the quantity of asbestos fibers
- Corrective actions and precautionary measures (e.g. restriction of access to certain areas of the dwelling) up to containment or asbestos removal works.
These measurements must be carried out by a company qualified to intervene on materials or products containing asbestos.
The asbestos diagnosis has a duration of unlimited validity.
However, it is recommended that a new diagnosis be made before a sale if renovation works have been carried out in the dwelling. Indeed, these works may reveal materials or products containing asbestos that were not visible when the previous diagnosis was made.
Yes, the presence of asbestos does not prevent the sale, but the future buyer must be aware of it before buying.
When the purchaser is informed of the presence of asbestos and buys the property as it is, he cannot apply to the court for the cancelation of the sale on this ground alone. In addition, by purchasing the property, the purchaser assumes the obligations associated with the presence of asbestos, at his own expense (for example, asbestos removal works).
Penalties vary depending on who is involved:
Seller
Your responsibility may be engaged if you do not transmit the asbestos diagnosis. In this case, you cannot be exempted from the guarantee of hidden defects (non-visible defects).
The purchaser may refer the location of the property to the court to obtain damages and interest.
You may also be fined €1,500 if you use an uncertified diagnoser to perform the diagnosis (€3,000 in case of recurrence).
Diagnostic
Reminder
The asbestos diagnosis covers materials and products that are visible and accessible at the time of identification.
If the purchaser discovers the presence of asbestos in the dwelling while the diagnosis concluded that it was absent at the time of sale, he may incur the liability of the professional who made the diagnosis if it proves to be erroneous.
In addition, a professional who makes a diagnosis without having a certification may be fined €1,500 (€3,000 in case of recurrence).
Who can help me?
Find who can answer your questions in your region
For more information on this subject, you can contact Allô Service Public.
Please note: the service does not have access to users' personal files and cannot therefore provide information on their progress.
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The informants who answer you belong to the ministry in charge of housing and urban planning.
- Departmental Agency for Housing Information (Adil)
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