Overview
- DGFiP will automatically add standard comfort features—water, electricity, bath or shower, WC, heating or AC—to cadastral files in 2026, increasing the notional area used to calculate bills without requiring owner declarations.
- Affected households are expected to pay about €63 more on average, generating roughly €466 million in additional revenue for local authorities, according to figures reported by national outlets and confirmed by Bercy.
- The revaluation is projected to touch about 25% of houses and 15% of apartments nationwide, with sharp disparities such as roughly 60% of dwellings in Haute‑Corse and 45% in Corse‑du‑Sud.
- Only the largest variations will receive advance notices, with messages slated to appear in users’ impots.gouv accounts around June 2026 and tax notices issued from August 2026.
- Officials say owners whose homes truly lack listed installations can contest and seek relief, while industry groups and unions criticize the move as unfair and warn of administrative challenges.