What Is a G-Rated Apartment Under the DPE?
A G-rated apartment represents the lowest grade on the Energy Performance Certificate (DPE) scale. It indicates very high energy consumption and substantial greenhouse gas emissions.
This classification mainly concerns older properties, often poorly insulated and equipped with outdated heating systems. Beyond thermal discomfort, a G rating directly impacts rental eligibility, resale value, and overall market attractiveness — particularly in Paris and major metropolitan areas.
The DPE: A Mandatory and Strategic Document
The Energy Performance Certificate is mandatory for any property sale or rental. It ranks homes from A (highly efficient) to G (highly energy-consuming).
Since the implementation of the Climate and Resilience Act, properties rated F and G have been subject to reinforced regulations. The objective is clear: reduce the number of energy-inefficient homes and accelerate the energy renovation of the French housing stock.
G-Rated Apartment: What Legal Restrictions Apply?
Since January 1, 2025, it has been prohibited to rent out a G-rated property, regardless of its actual energy consumption level. This measure aims to protect tenants and encourage landlords to undertake renovation works.
The regulatory timetable provides:
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2025: rental ban on G-rated properties
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2028: extension to F-rated properties
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2034: extension to E-rated properties
Landlords must therefore anticipate and plan renovation works now to avoid any loss of rental income.
Energy Audit: A Mandatory Step
Since April 2023, an energy audit has been mandatory when selling an F- or G-rated apartment. This audit:
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precisely identifies the property’s energy weaknesses,
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proposes several renovation scenarios,
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estimates the associated costs,
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evaluates expected energy gains and future comfort levels.
The audit provides a solid foundation for planning a coherent and effective energy renovation strategy.
Renovation Solutions to Exit the G Rating
Energy renovation is the most sustainable way to enhance the value of a G-rated apartment. Key measures include:
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Thermal insulation: walls, roof, ground floors, and windows to reduce heat loss.
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Efficient heating systems: replacement with a heat pump, condensing boiler, or hybrid system.
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Ventilation: installation of mechanical ventilation (VMC) to improve indoor air quality.
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Renewable energy solutions: solar panels, thermodynamic water heaters, hybrid systems.
These improvements enhance not only energy performance but also living comfort and long-term asset value.
