Mandatory Property Diagnostics in France (DDT): Complete 2026 Guide
In France, buying, selling, or renting a property requires a set of mandatory technical diagnostics known as the DDT (Dossier de Diagnostic Technique). These diagnostics inform buyers and tenants about the property's energy performance, presence of hazardous materials, and compliance with safety standards.
Missing or outdated diagnostics can invalidate a sale, expose sellers to liability, or result in fines up to €1,500. This guide explains which diagnostics are required, how long they're valid, and what they typically cost.
Key Diagnostics for Property Sales
| Diagnostic | Required when | Validity | Typical cost |
|---|---|---|---|
| DPE (Energy rating) | All properties | 10 years | €100–200 |
| Asbestos survey | Built before July 1997 | Unlimited if clear | €80–150 |
| Lead paint (CREP) | Built before 1949 | 1 year if positive | €100–200 |
| Termites | Designated risk zones | 6 months | €80–150 |
| Gas installation | Installation > 15 yrs | 3 years | €100–150 |
| Electrical installation | Installation > 15 yrs | 3 years | €100–200 |
| Risk & pollution (ERP) | All properties | 6 months | €15–40 |
| Energy audit | F or G rated homes | 5 years | €500–1,500 |
What Diagnostics Mean for Renovation
Diagnostics often reveal renovation requirements. Asbestos or lead detection imposes strict protocols that affect cost and scheduling. A poor DPE (F or G) triggers the mandatory energy audit, which is also the starting point for French renovation subsidies (MaPrimeRĂ©nov').
If your property diagnostics reveal work to be done, a professional renovation broker can help you plan the works, select certified contractors, and navigate the subsidy process.
Property diagnostics revealing work needed?
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