Gokhan Ilan Yaman, founder and director of Chrono Diagnostic, a real estate diagnostic company in Île-de-France, tells us about it.
When should the property diagnosis be carried out?
Chrono Diagnosis: The real estate diagnosis, grouped in the technical diagnosis file (DDT), is a crucial step at two key moments: during the sale and rental of a property.
In the event of a sale, it must be included in the promise of sale and in the authentic deed.
For a rental, it is imperative to annex it to the lease.
Why should I engage in this process?
Chrono Diagnostic: Completing this file is of crucial importance for the negotiation of your sale or rental, because it sincerely informs the buyer or tenant of the characteristics of your property and its environment.
It must be sure and precise, without exaggeration or concealment.
The diagnostics are actually intended to ensure the security and information of the parties involved in the transaction.
What are the advantages of this diagnosis for me, seller or lessor?
Chrono Diagnosis: After the sale or during the rental, the DDT is positioned as a protective shield after the sale or during the rental.
It protects you from possible claims from the buyer or tenant leading to a reduction in the price.
It is essential to understand that it is you who will be called under warranty.
To avoid any pitfalls, do not settle for photocopies of certificates.
Rigorously verify the validity of your diagnostician's insurance and certification by contacting insurance and certification organizations directly.
The security and precision of these diagnostics are essential for a real estate transaction with complete confidence.
What diagnostics are required for rental or sale?
Chrono Diagnostic: For rental or sale, as well as for work, lead and asbestos diagnostics are also required.
Depending on the situation, whether for a rental or a sale, the number of mandatory diagnostics varies according to the geographical location, the year of construction of the building and the presence of a co-ownership or single-ownership.
For rental, the mandatory diagnostics are: Electricity, Gas, Energy Performance Diagnostic (DPE), Asbestos, Lead, Risk and Pollution Status (ERP), and Measurement.
“Measurement” is governed by the Boutin law for rental, and refers to the rules of measurement in order to ensure decent housing for the occupant, providing in particular a minimum height of 2m20 for decency.
For sales, measurement is governed by the Carrez law, taking into account a ceiling height of 1m80 to calculate the habitable square meters.
For sales, the mandatory diagnostics are the same, with the addition of termite diagnostics.
In all cases, for new constructions in co-ownership, only measurement, energy and termite diagnostics are required, in accordance with municipal decrees.
If there is a risk of termite infection in the area, a diagnosis must be carried out with notification to the town hall, because termites are living organisms potentially moving from one area to another.
How long is the diagnostic file valid for?
Chrono Diagnostic: The technical diagnostic file does not have a uniform validity period, each diagnosis having its own validity period.
For the gas and electricity diagnosis relating to safety, mandatory in the event of the sale of a home with a gas installation more than 15 years old, its validity is three years for the sale and 6 years for the rental.
Regarding the lead diagnosis, necessary for the sale or rental of housing built before January 1, 1949, its validity is one year in the case of sale and six years in the case of rental.
The asbestos diagnosis, indicating the presence or absence of asbestos, is mandatory for the sale of a building constructed before July 1, 1997. Although its validity is unlimited, normative changes or work may invalidate a previous report.
The Energy Performance Diagnosis (DPE), mandatory for the sale or rental of an enclosed, covered and heated building, is valid for 10 years.
However, work or developments in energy efficiency may modify the results of the DPE.
The non-collective sanitation control, required for the sale of a building not connected to mains sewers, is valid for 3 years.
The objective of the DPE is to inform future occupants of energy consumption and CO2 emissions for standard use of the building.
How long does it take to make a diagnosis?
Chrono Diagnosis: The duration of establishing a diagnosis varies depending on the nature of the file, whether for a sale or rental.
This can take anywhere from an hour to half a day.
The analysis primarily focuses on everything that is visually accessible, without including examining the foundations.
What are the consequences of classifying a property in category G or F for its owner?
Chrono Diagnosis: These classifications can present a challenge when selling, as they are often synonymous with a depreciation in the value of the property.
Indeed, French notaries indicate that properties classified F or G can suffer a significant drop in price, of up to -11% for apartments and -19% for houses compared to properties classified in category “D ".
This devaluation makes the property less attractive on the market.
Moreover, apartments classified DPE G with more than 450 kWh in final energy per square meter per year have even been prohibited from renting since January 1, 2023. All housing classified in G will follow in 2025, and those classified F in 2028 and E in 2034. The direct consequence of these unfavorable energy classifications is often the need to undertake energy improvement works.
And for potential buyers?
Chrono Diagnostic: On the buyer's side, significant opportunities for improvement exist.
He can undertake projects such as insulating walls, replacing the heating and domestic hot water system, changing windows, or even installing controlled mechanical ventilation (VMC).
Work involving modification of the exterior of the building is generally limited in order to preserve its appearance.
They are governed by the rules of co-ownership, especially in the case of old buildings, but all interior insulation options are possible.
These efforts can make it possible to reclassify the property from category G to a more favorable category, such as D to A, thus improving its energy efficiency.
Where are the majority of energy-intensive goods found?
Chrono Diagnosis: Mainly in Île-de-France!
The ranking of French cities also reserves some surprises.
What explains this?
Why are some cities or towns called “thermal sieves”?
Chrono Diagnosis: In certain localities such as Paris, the high concentration of thermal sieves can be explained by the preponderance of collective housing, making renovation operations more complex.
In addition, the frequent presence of small areas in Paris, penalized by the new calculation method of the Energy Performance Diagnosis (EPD), now taking into account the effective structure of the property and no longer the consumption of the occupant, contributes to this tendency.
With the new diagnosis, the average score in Paris is classified as E for old buildings before 1949, and D for those built after.
Barometer and ranking of DPE?
FNAIM DPE barometers
FNAIM DPE barometers
FNAIM DPE barometers