Moneyadviceblog » Money » Selling A House: What Are The Mandatory Diagnoses?

When there is a sale of a dwelling, the seller must provide some mandatory diagnoses of the house. This gives more guarantees to the new buyer. What are these diagnoses? So, without further ado, let’s dive into this blog and learn some of the things you need to know before selling your home.

Importance of diagnostics before the sale of a house


Diagnoses must be made and submitted to the buyer already from the sales agreement or the signature. These diagnoses are of paramount importance for the buyer. They allow him to have a better knowledge of the real estate of which he comes into possession. They are also essential for the seller since this will avoid possible disputes after the sale. In the event that the seller does not provide these diagnoses, he will have to provide compensation if the buyer finds certain hidden defects in the house. For example, the house may contain lead, termites, etc. This can therefore lead to compensation.

Are diagnostics required?

The diagnoses established during the sale of a house are indeed mandatory. Since no notary will assist in a sale without a pre-established diagnosis of the house, this allows you to have a precise idea of the property to be sold. This is why it is recommended that sellers make the diagnosis of their accommodation before arriving in front of the notary.

The latter requests these documents in particular in order to have certain information. This is information about the Carrez law surface area and energy performance. But note that the seller is free to do the renovation work or not. Also, he is not required to bear the financial charges that the work may entail. In this specific case, the price of the accommodation may be negotiated by the buyer.

How to establish the diagnostics of a house?

Certified specialists establish the diagnoses of a house in the technical evaluation of real estate. That is to say; he must have the skills and the assurances necessary for the exercise of his function. They are the only ones authorized by law to establish diagnoses. You can also call on individuals but in specific cases. For example, they are called upon when it comes to Carrez law footage or when it comes to technological and natural risks.

What are the mandatory diagnostics before the sale of a house?

Some diagnoses are more important than others when selling a home.

Lead diagnosis

This diagnosis is necessary for houses built before January 1949. It is used to measure the quantity of lead present in the coatings as well as their state of conservation.

Asbestos diagnosis

The asbestos diagnosis is obtained for properties that were completed before July 1997. It concerns all buildings, whether individual or collective.

Termite diagnosis

Termites are known to damage wood. And in a house, they can cause damage like collapse. This diagnosis concerns all types of housing, especially when they are located in risk areas.

Gas diagnosis

It determines if the house is suitable for living in and if the pipes, gas fittings, and all gas-related appliances are in good condition. This type of diagnosis is only dedicated to houses or apartments with a gas installation that is at least 15 years old.

Electrical diagnostics

It allows you to check the entire electrical installation of a house. It concerns houses and their outbuildings.

The energy performance diagnosis

The energy performance diagnosis or DPE allows the buyer to be informed about the thermal insulation of the house. This will allow him to predict the charges to be allocated.

The sanitation diagnosis


It allows verification of the waters of the accommodation and very often concerns individual houses. Water treatment is carried out in order to eliminate probable health hazards.

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