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Before renting or selling a French property, owners must compile a Dossier de Diagnostic Technique (DDT) — a package of mandatory technical certificates produced by accredited diagnosticians. The DDT must be attached to the lease at signing. Missing or expired certificates expose landlords to legal liability, can give tenants grounds to seek rent reduction, and — since 2025 — can result in fines for renting an energy-inefficient property. This guide covers every certificate, when it is required, how long it remains valid, and what changed in 2025.
Key takeaways
- The DDT is mandatory and must be attached to the lease at signing.
- All certificates must be produced by a COFRAC-accredited diagnostician — the landlord cannot produce them.
- The DPE is the most visible certificate and must appear in all rental advertisements.
- From 1 January 2025, G-rated properties may no longer be offered on new or renewed leases.
- The ERP must be no more than 6 months old at the date of lease signing.
- A full DDT typically costs 400–700 EUR depending on property size and number of diagnostics required.
What is the Dossier de Diagnostic Technique?
The DDT is a bundle of technical diagnostic reports compiled by a certified diagnostiqueur immobilier — a property diagnostician accredited by a COFRAC-recognised certification body. It must be provided to the tenant at lease signing, or to the buyer at the signature of the compromis de vente. The landlord or seller always pays for the DDT; it cannot be passed to the tenant.
A typical full DDT for a rental property costs 400–700 EUR depending on the number of diagnostics required and the property's size. Diagnosticians must be independent and certified; landlords and agents may not produce the reports themselves.
ℹ Info: Most diagnosticians offer a combined visit covering all required certificates in one appointment. Booking a combined visit is more cost-effective than separate visits and ensures all certificates share the same inspection date.
Complete table of mandatory rental certificates
| Certificate | French name | Applies to | Rental validity | Purpose |
|---|---|---|---|---|
| Energy rating | DPE | All properties | 10 years | Energy efficiency A–G scale |
| Lead | CREP | Built before 1 Jan 1949 | Unlimited (no lead found); 6 years (lead found) | Lead paint health risk |
| Asbestos | État amiante | Building permit before 1 Jul 1997 | Unlimited (post-2013, no asbestos) | Asbestos in materials |
| Electricity | État installation électrique | Electrical installation > 15 years old | 6 years | Electrical safety |
| Gas | État installation gaz | Gas installation > 15 years old | 6 years | Gas safety |
| Risks and pollution | ERP | All properties | 6 months | Natural, technological, mining risks |
| Termites | État parasitaire | Properties in declared risk zones | 6 months | Wood-boring insects |
| Noise | Diagnostic bruit | Properties in declared noise zones | Unlimited | Airport and transport proximity |
| Non-mains drainage | Assainissement non collectif | Properties not on public sewage | 3 years | Sanitation condition |
Each certificate explained
DPE — Energy Performance Certificate
The DPE rates a property's energy consumption and greenhouse gas emissions on an A-to-G scale. It is required for all properties and must be displayed in all rental advertisements. Validity is 10 years — but DPEs issued before July 2021 are no longer valid and must be renewed before any new lease is signed.
From 1 January 2025, G-rated properties may not be offered on new or renewed leases. From 1 January 2028, F-rated properties will also be banned from new leases. From 1 January 2034, E-rated properties will follow. From September 2025, all DPE documents must include a QR code linking to the ADEME national registry.
⚠ Warning: Offering a G-rated property for rent after 1 January 2025 exposes the landlord to penalties and can give the tenant grounds to claim rent reduction or rescind the lease.
CREP — Lead Certificate
The Constat de Risque d'Exposition au Plomb (CREP) is required for any property whose building permit predates 1 January 1949. The certificate identifies the presence of lead in paint. If no lead is found, the certificate has unlimited validity. If lead is found, it expires after 6 years and the landlord must carry out remediation work.
État amiante — Asbestos Certificate
Required where the building permit predates 1 July 1997. Asbestos was widely used in insulation, floor tiles, and roofing before its ban. A post-2013 inspection that finds no asbestos gives the certificate unlimited validity. If asbestos is found, a further detailed inspection (repérage approfondi) is required and works must be assessed.
État installation électrique — Electrical Safety Certificate
Required where the electrical installation is more than 15 years old. Validity is 6 years. The inspection identifies wiring defects, absent earthing, overloaded circuits, and other safety hazards.
État installation gaz — Gas Safety Certificate
Required where the gas installation is more than 15 years old. Validity is 6 years. The inspection checks for gas leaks, ventilation adequacy, and the condition of appliances connected to the installation.
ERP — État des risques et pollutions
Required for all properties. Validity is 6 months — the ERP must be no more than 6 months old at the moment of lease signing. It covers natural risks (flooding, seismic activity, avalanche, drought), technological risks (proximity to SEVESO-classified industrial sites), mining risks, radon concentration, and soil pollution.
The ERP is the one diagnostic in the DDT that landlords may complete themselves, using the free government portal at georisques.gouv.fr.
ℹ Info: The ERP is the only diagnostic in the DDT that landlords can prepare themselves, using the free government tool at georisques.gouv.fr.
État parasitaire — Termite Certificate
Required in municipalities where a prefectoral order has declared a termite risk zone. Affected areas include mainly the south-west (Gironde, Lot-et-Garonne, Landes), parts of Île-de-France, and areas of Rhône-Alpes. Validity is 6 months. Landlords should check the current list of declared zones with their local prefecture before signing any new lease.
2025 and 2026 changes
The Loi Climat et Résilience (loi n° 2021-1104 du 22 août 2021) introduced a phased schedule of restrictions on renting energy-inefficient properties. The milestones most relevant to landlords are as follows.
⚠ Warning: Rental ban timeline
- 1 January 2025: G-rated properties may no longer be offered on new or renewed leases.
- September 2025: All DPE documents must include a QR code linking to the ADEME national registry.
- 1 January 2028: F-rated properties will be banned from new or renewed leases.
- 1 January 2034: E-rated properties will be banned from new or renewed leases.
Legal basis: Loi Climat et Résilience, loi n° 2021-1104 du 22 août 2021.
Landlords with F- or G-rated properties should plan renovation works well in advance of these deadlines. The main levers for improving a DPE rating are insulation (roof, walls, floors), replacing gas boilers with heat pumps, and upgrading glazing.
How to organise the DDT
Preparing the DDT in time for lease signing requires a structured approach. Follow these steps to avoid delays.
- Identify which certificates apply. Check the age of the building permit, the age of the electrical and gas installations, and whether the property is located in a declared risk zone for termites or noise.
- Obtain 2–3 quotes. Contact COFRAC-accredited diagnosticians. Ask for a combined DDT package covering all required certificates in a single visit.
- Book a combined diagnostic visit. A single appointment is more cost-effective than separate visits and ensures all certificates share the same inspection date.
- Confirm all certificates are in date at signing. Pay particular attention to the ERP (6-month validity) and termite certificate (6-month validity). Do not book too far in advance of the intended signing date.
- Attach originals to the lease. The DDT must be physically annexed to the signed lease. Digital copies are accepted if the lease is signed electronically.
⚠ Warning: Certificates must be in date at signing, not just at the time they were produced. An ERP produced 7 months before signing is already expired.
Consequences of missing or invalid certificates
Failing to provide a complete, valid DDT at lease signing carries serious consequences for landlords.
⚠ Warning: Legal exposure from an incomplete DDT
- A missing or invalid DPE gives the tenant grounds to seek a rent reduction before a court.
- In a sale, a buyer can rescind the transaction or negotiate a price reduction if required certificates were absent from the compromis de vente.
- Renting a G-rated property after 1 January 2025 exposes the landlord to administrative penalties and tenant claims.
- Known diagnostic risks that were not disclosed may void insurance claims arising from related damage (for example, a fire caused by an electrical fault in an installation that was never inspected).
Courts have consistently held that the obligation to provide the DDT is a condition of the lease, not merely a formality. Landlords cannot argue that a missing certificate was an oversight once a dispute has arisen.
Frequently asked questions
Sources
- Légifrance — Code de la construction et de l'habitation: obligations de diagnostic
- Service-public.fr — Diagnostic immobilier obligatoire pour la location
- ADEME — Le Diagnostic de Performance Energétique (DPE)
- Géorisques.gouv.fr — État des risques et pollutions (ERP)
- Légifrance — Loi Climat et Résilience, loi n° 2021-1104 du 22 août 2021