1. Introduction
When selling a property, it is essential to provide a Technical Diagnostic File (DDT), which groups together various property diagnostics. These documents are essential to inform the buyer about the condition of the property and to protect the seller against any legal action for hidden defects. The DDT must be appended to the compromis de vente and the acte authentique, and must be completed as soon as the property is put up for sale.
2. Technical Diagnostic File (DDT)
The content of the DDT depends on several factors: the location of the property, its date of construction and its type. The aim of the DDT is to ensure transparency in property transactions by informing the buyer of the actual condition of the property.
3. Diagnostics to be carried out
The DDT may include several diagnoses depending on the characteristics of the property:
- Lead: for homes built before 1949.
- Asbestos: for buildings dating from before 1997.
- Termites: in high-risk areas.
- Gas and electricity: for installations over 15 years old.
- Energy performance (DPE): for all types of property.
- Natural and technological risks: compulsory for all homes.
3.1. Specific diagnoses
Some additional diagnostics are required depending on the nature or location of the property:
- Loi Carrez metrage: for co-owned properties.
- Sanitation diagnosis: for properties not connected to mains drainage.
Note: The DPE (Diagnostic de Performance Énergétique) is particularly important, as it must be indicated in the sale advert and given to each visitor.
4. When should diagnostics be carried out?
Although these diagnostics are legally required when you sign the preliminary sales agreement, we strongly recommend that you have them carried out as soon as the property is put up for sale. There are a number of advantages to doing so in advance:
- Better inform buyers from the outset.
- Facilitate negotiations and transparency.
- Avoid delays in the sales process.
In particular, the DPE is essential for indicating the property’s energy class and heating costs in the sale advert.
5. Are the seller responsible for carrying out the diagnostics?
Yes, the seller must bear the cost of the diagnostics. The overall cost varies according to :
- The surface area of the property.
- Its age (date of construction).
- Its location.
By way of example:
- For a 20 m² flat built before 1949, the cost of diagnostics can start at around €300.
- For a 130 m² house, the price can reach €600 or more.
6. Validity of diagnoses
The period of validity of each diagnosis is not the same for everyone:
- Lead: 1 year (if lead is present).
- Asbestos: no specific time limit if not present, but a recent diagnosis is required if present.
- ECD: valid for 10 years.
It is essential that all the diagnostic tests are up to date when you sign the preliminary sales agreement. If the diagnosis is out of date, it will have to be redone.
7. Work prior to sale : Obligation or option?
The seller is not obliged to carry out any work following the diagnosis. However, they can have an impact on :
- The buyer’s decision (if major work is required).
- The amount of the offer (an unfavourable EPD can reduce the price).
No diagnosis formally obliges you to undertake renovations, but a property in better condition generally sells more easily and at a better price.
8. Energy Performance Diagnosis (DPE)
The DPE is a compulsory document, which must be attached to the promise or compromise to sell. It classifies the property according to :
- Its energy consumption.
- Its greenhouse gas emissions.
In addition, the energy class must be mentioned from the first visits and in all property advertisements.
9. Where can I find a certified diagnostician?
A certified diagnostician must be called in to carry out these diagnostics (with the exception of certain cases such as the Carrez law or the statement of natural risks, which can be carried out by the seller).
To find a certified professional, you can consult the website of the Ministry of Sustainable Development or other specialist directories.
10. Conclusion
Property surveys are essential documents for any property sale. They inform the buyer about the actual condition of the property and protect the seller in the event of a dispute over hidden defects. To facilitate the sale and avoid any delays, it is advisable to carry out the surveys as soon as the property is put up for sale.
The cost of diagnostics, which is the responsibility of the seller, varies according to a number of criteria, but may be deductible from the capital gain on the property if it is taxed. Finally, to optimise costs, it may be a good idea to compare quotes from several certified diagnosticians.
PS: If you haven’t carried out the diagnostics yet, why not make an appointment with us? We have a great offer for you.
