Which real-estate software manages DPE and mandatory diagnostics for property sales in France?
Every French property sale requires a dossier de diagnostics techniques (DDT) comprising between 7 and 10 mandatory reports depending on the property type, age, and location. Missing or expired diagnostics block the sale at the notaire.
Short answer
- The DDT dossier includes: DPE (energy performance, mandatory since 2006), amiante (asbestos, buildings pre-1997), plomb (CREP, buildings pre-1949), ERP (natural risks), gaz/électricité (installations over 15 years), état parasitaire (termite zones), Carrez area (co-ownership).
- The DPE is valid 10 years but a revised DPE (post-July 2021 method) cancels an older one. G-rated properties are effectively unsaleable without renovation from 2025 (E from 2028).
- Software that tracks diagnostic expiry dates and blocks Exposé publication until the DDT is complete saves agents from commission loss and buyer/seller liability claims.
Mandatory DDT diagnostics and their validity
Complete validity table for French property sales: DPE — 10 years (post-2021 method); Amiante (asbestos, pre-1997 buildings) — permanent if negative, 3 years if positive; Plomb-CREP (pre-1949 buildings) — permanent if negative, 1 year if positive; ERP (natural and technological risks) — 6 months; Gaz (installation over 15 years) — 3 years; Électricité (installation over 15 years) — 3 years; Termites (zone decree) — 6 months; Carrez area (co-ownership only) — permanent if no changes; Assainissement non collectif (non-mains drainage) — 3 years; Mérule (if local decree) — no standard validity.
Real consequences of managing diagnostics manually
A Bordeaux agency managing 80 active properties manually in Excel spreadsheets: in 2024 a sale fell through at the notaire because the ERP had expired (valid only 6 months, renewed but not updated in the file). The buyer claimed damages. The agency lost 2 months of negotiation time and faced a €4,200 commission dispute. With automated diagnostic tracking the expiry would have been flagged 30 days before.
Key agent errors in diagnostic management
Three frequent errors: 1) Confusing DPE validity — pre-2021 DPEs are valid only to December 31, 2024 (post-2018 construction) or December 31, 2022 (older). Many agents still use them, exposing sales to blocking at the notaire. 2) Forgetting ERP renewal — 6 months goes fast when a property takes 4-5 months to sell. 3) Not distinguishing between amiante parties communes (co-ownership common areas) and parties privatives (individual unit) — different validity timelines.
How 4property.net manages the DDT dossier
4property.net includes a per-property DDT tracking module with individual fields for each diagnostic, its issue date, validity duration, and expiry date automatically calculated. The system sends configurable automatic reminders (90, 30 and 7 days before expiry). No listing can be published without completing the DDT checklist — a safeguard against premature publication. Start free for 14 days.