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Real estate diagnosis: status of the internal gas installation

Verified 05 septembre 2019 - Directorate for Legal and Administrative Information (Prime Minister)

The condition of the indoor gas installation is a diagnosis that provides an overview of the safety of the gas installations in a dwelling. It is mandatory for all gas installations over 15 years of age. The initiative to have the diagnosis carried out varies depending on whether the housing concerned is offered for sale or for rent.

In case of sale

The condition of the indoor gas installation is a diagnosis that assesses the risks that could endanger the safety of people and their property.

The seller must have the diagnosis carried out by a certified professional.

This diagnosis must be integrated with the different diagnoses included in the Technical Diagnostic Folder (DDT).. This file must be given to the purchaser at the time of signing the promise to sell or, if not, at the bill of sale.

If the installation has been modified and has been the subject of a certificate of conformity, it shall take the place of the gas installation if it has been done for less than 3 years at the date it is required. To be valid, the certificate must come from an organization approved by the Minister responsible for energy. Currently, 3 organizations are accredited:

  • Qualigaz
  • Dekra
  • Copraudit.

For more information, please contact these organizations.

Diagnosis is mandatory for all dwellings (apartments or houses) where the gas installation is more than 15 years old.

  Please note : the facilities in the outbuildings of individual houses are also affected.

The diagnosis must be carried out by a certified professional.

Find a Certified Real Estate Diagnostic

Ministry of the Environment

The diagnosis must conform to a strictly regulated methodology ..

  FYI : the diagnosis shall be made without dismantling the installations.

The diagnosis is valid for 3 years.

For Seller

The liability of the seller may be incurred if he does not voluntarily transmit the diagnosis or if he mentions false information in the advertisement of sale to mislead the future purchaser.

The acquirer may seize the court to request cancelation of the sale or damages.

The acquirer may also seize the fraud department of the Directorate-General for Competition, Consumer Affairs and Fraud Prevention (DGCCRF)..

The DGCCRF may impose on the seller:

  • a fine of €300,000,
  • and a 2-year prison sentence.

The seller may also be fined €1,500 use of an uncertified diagnoser to perform the diagnosis (€3,000 in case of recidivism).

For the Diagnoser

If he commits a mistake in the performance of his mission by not respecting the rules of the art and the norms (for example, erroneous diagnosis) he is obliged to compensate the buyer for the damage suffered.

He may be fined €1,500 if he exercises without certification (€3,000 in case of recidivism).

For notary

The notary's liability may be incurred in particular if he has validated the sale in the absence of the diagnosis or by having knowledge of false information misleading the future purchaser.

The acquirer may seize the court and obtain damages.

The acquirer may also seize the fraud department of the Directorate-General for Competition, Consumer Affairs and Fraud Prevention (DGCCRF)..

The DGCCRF may impose on the notary:

  • a fine of €300,000,
  • and a 2-year prison sentence.

In case of rental

The condition of the indoor gas installation is a diagnosis that aims to assess the risks that could compromise the safety of people and their property.

The lessor must have this diagnosis carried out by a certified professional.

This diagnosis must be integrated with the different diagnoses included in the Technical Diagnostic Folder (DDT).. This file must be given to the tenant at the time the lease is signed.

If the installation has been modified and has been the subject of a certificate of conformity, it shall take the place of the gas installation if it has been done for less than 6 years at the date it is required. To be valid, the certificate must have been endorsed by an organization approved by the Minister responsible for energy. Currently, 3 organizations are accredited:

  • Qualigaz
  • Dekra
  • Copraudit.

For more information, please contact these organizations.

Diagnosis is mandatory for all dwellings (apartments or houses) where the gas installation is more than 15 years old.

The diagnosis must be carried out by a certified professional.

Find a Certified Real Estate Diagnostic

Ministry of the Environment

The diagnosis must conform to a strictly regulated methodology ..

  FYI : the diagnosis shall be made without dismantling the installations.

The diagnosis is valid for 6 years.

For the lessor

The landlord may be liable if he does not voluntarily transmit the diagnosis or if he mentions false information in the rental advertisement to mislead the future tenant.

The tenant can enter the court to request the cancelation of the lease or a reduction in the rent.

The tenant may also seize the fraud department of the Directorate-General for Competition, Consumer Affairs and Fraud Prevention (DGCCRF)..

The DGCCRF may impose on the lessor:

  • a fine of €300,000,
  • and a 2-year prison sentence.

The lessor may also be fined €1,500 use of an uncertified diagnoser to perform the diagnosis (€3,000 in case of recidivism).

For the Diagnoser

If he commits a mistake in the performance of his mission by not respecting the rules of the art and the norms (for example, erroneous diagnosis) he is obliged to compensate the tenant for the damage suffered.

He may be fined €1,500 if he exercises without certification (€3,000 in case of recidivism).