Real estate diagnosis: state of interior gas installation
Verified 11 August 2021 - Directorate for Legal and Administrative Information (Prime Minister)
The state of the indoor gas installation, also known as gas diagnosis, is a diagnostic which gives an overview of the safety of gas installations in housing. Your home is affected if the gas installation is more than 15 years old. The diagnostic shall be integrated into the technical diagnostic record (DDT). DDT must be given to the purchaser or tenant in the event of the sale or rental of a dwelling.
Sale
The condition of the indoor gas installation (or gas diagnosis) is a diagnostic that assesses the risks that may endanger the safety of persons and their property.
The seller must have this diagnosis performed by a certified professional.
Warning
if the installation has already been modified and has been certified as compliant, you do not need to have a gas diagnostic performed. To be valid, your certificate of conformity must be less than 3 years before the signature of the promise to sell or the deed of sale. It must come from an organization approved by the minister responsible for energy. Three bodies are currently involved: Qualigaz, Dekra and Copraudit.
You must have a gas diagnosis made in case of sale of a house (apartment, detached house) if the gas installation is more than 15 years old.
FYI
the facilities included in the outbuildings of the detached houses are also concerned.
You must use a certified diagnoser.
You can use a directory to find a certified diagnoser:
Diagnosis should be in accordance with strictly regulated methodology.
Please note
the diagnosis is carried out without dismantling the installations.
The diagnoser gives you the diagnosis.
You must integrate this diagnosis with the various diagnostics included in the Technical Diagnostic Record (DDT).
You must give the DDT to the buyer at the time of signing the promise to sell or the bill of sale.
The diagnosis is valid for 3 years.
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For the seller
You may be liable if you do not voluntarily pass the diagnosis on to the buyer or if you mention false information in the sale advertisement to mislead the buyer.
The purchaser may appeal to the court to request the cancelation of the sale or obtain damages.
The purchaser may also appeal to the Fraud department of the Directorate-General for Competition, Consumer Affairs and Fraud Prevention (DGCCRF).
The DGCCRF can punish you with a fine of €300,000 and a 2-year prison sentence.
You may also be fined €1,500 if you are using an uncertified (€3,000 in case of recurrence).
For the Diagnoser
If the diagnoser makes a mistake by not complying with the regulations to carry out the diagnosis (for example, incorrect diagnosis), the purchaser can make a complaint to the court to request damages.
The diagnoser may be fined €1,500 if he exercises without certification (€3,000 in case of recurrence).
For the notary
The notary may be liable in particular if he has validated the sale in the absence of the diagnosis or if he has knowledge of false information misleading the buyer.
The purchaser may appeal to the court to request damages.
The purchaser may also appeal to the Fraud department of the Directorate-General for Competition, Consumer Affairs and Fraud Prevention (DGCCRF).
The DGCCRF may penalize the notary with a fine of €300,000 and a 2-year prison sentence.
Rental
The condition of the indoor gas installation (or gas diagnosis) is a diagnostic that assesses the risks that may endanger the safety of persons and their property.
The lessor must have this diagnosis carried out by a certified professional.
Warning
if the installation has already been modified and has been certified as compliant, you do not need to have a gas diagnostic performed. To be valid, your certificate of compliance must be less than 6 years old before the lease is signed. It must come from an organization approved by the minister responsible for energy. Three bodies are currently involved: Qualigaz, Dekra and Copraudit.
You must have a diagnosis made when renting a dwelling (apartment, detached house) if the gas installation is more than 15 years old.
FYI
the facilities included in the outbuildings of the detached houses are also concerned.
You must use a certified diagnoser.
You can use a directory to find a certified diagnoser:
Diagnosis should be in accordance with strictly regulated methodology.
Please note
the diagnosis is carried out without dismantling the installations.
The diagnoser gives you the diagnosis.
You must integrate the diagnosis with the various diagnostics included in the Technical Diagnostic Record (DDT).
You must give the DDT to the tenant at the time of signing the lease.
Diagnosis is valid for 6 years.
Répondez aux questions successives et les réponses s’afficheront automatiquement
For the lessor
You may be liable if you do not voluntarily pass the diagnosis to the tenant or if you mention false information in the rental advertisement to mislead the tenant.
The tenant can appeal to the court to request the cancelation of the lease or a reduction in the rent price.
The tenant can also appeal to the Fraud department of the Directorate-General for Competition, Consumer Affairs and Fraud Prevention (DGCCRF).
The DGCCRF can punish you with a fine of €300,000 and a 2-year prison sentence.
You may also be fined €1,500 if you are using an uncertified (€3,000 in case of recurrence).
For the Diagnoser
If the diagnoser makes a mistake by not complying with the regulations to carry out the diagnosis (for example, incorrect diagnosis), the tenant can make a complaint to the court to request damages.
The diagnoser may be fined €1,500 if he exercises without certification (€3,000 in case of recurrence).
Who can help me?
Find who can answer your questions in your region
Telephone administrative information - Allo Public Service
The informants who answer you belong to the ministry in charge of housing and city planning.
Cost: free service
Attention: the service does not have access to users' personal files and therefore cannot provide information on their progress.
The service is available at the following times:
- Monday: 8.30am to 5.30pm
- Tuesday: 8:30 to 12:15
- Wednesday: 8:30 to 12:15
- Thursday: 8.30am to 5.30pm
- Friday: 1 p.m. to 4:15 p.m
- Lundi : de 08h30 à 16h15
- Mardi : de 08h30 à 12h15
- Mercredi : de 08h30 à 12h15
- Jeudi : de 08h30 à 17h30
- Vendredi : de 13h00 à 16h15
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National Institute of Consumer Affairs (INC)
Directorate of Legal and Administrative Information (Dila) - Prime Minister
