Real Estate Technical Inspection: DPE 2026 Standards

The technical inspection of a real estate property, often likened to a true "health check-up" of the dwelling, takes on a strategic dimension with the entry into force of new DPE (Energy Performance Diagnosis) standards in 2026. Faced with regulatory tightening resulting from the Climate and Resilience Act of 22 August 2021, landlords, real estate agents and investors must anticipate enhanced inspections and more demanding energy thresholds. This article details the expected changes and best practices to adopt.

The 2026 DPE: an even more structuring diagnosis

Since the July 2021 reform, the DPE has become legally binding. The timetable set by the Climate Act provides for a progressive prohibition on renting thermal sink properties: dwellings classified as G have been banned from rental since 1 January 2025, F-rated ones will be banned from 1 January 2028, and E-rated ones from 1 January 2034. This trajectory requires, from 2026 onwards, heightened vigilance during the technical inspection prior to any transaction or rental placement.

The 2026 diagnosis now incorporates new parameters: refined consideration of ventilation, analysis of thermal bridges, assessment of summer comfort and reinforced weighting of greenhouse gas emissions. The 3CL-DPE method evolves to better reflect the actual performance of the building.

Key stages of a compliant technical inspection

A technical inspection structured in 2026 must cover several areas: inspection of the thermal envelope (walls, roof, joinery), verification of the heating system and domestic hot water production, control of ventilation (single or double-flow VMC), and assessment of energy regulation. The diagnostician, certified according to the Order of 20 July 2023, must now produce a more detailed report, including costed work scenarios.

The energy audit, mandatory since 1 April 2023 for the sale of properties classified as F and G, will be extended in 2026 to properties classified as E in single ownership. This audit complements the DPE and becomes a central document during negotiations.

Impact on sales and rental value

"Green value" is establishing itself as a determining criterion. According to the Notaries of France, a property classified as A or B is negotiated on average 6 to 14% more expensive than a property classified as D in the same area. Conversely, a discount of 10 to 20% is applied to thermal sink properties. Investors now systematically incorporate the cost of renovation work into their return on investment calculation, aided by the MaPrimeRénov' scheme and CEE (Energy Savings Certificates).

Penalties and reinforced obligations

Non-compliance with DPE obligations exposes landlords to significant penalties. A landlord renting a non-compliant property is exposed to an action for rent reduction before the civil court, or even to forced completion of the work (article 20-1 of the Act of 6 July 1989). The provision of an erroneous DPE engages the responsibility of the diagnostician but also of the seller on the basis of misrepresentation (article 1137 of the Civil Code).