DPE: these dwellings that go from G to E … without doing work

With the reform of the energy performance diagnosis of 2024, then that which will come into force, a certain category of housing will see its improved note of two notches. All without energy renovation!

• 
  

  To safeguard
  

  
  
  

  Saved
  

In 2023, the 15 square meter Studet that you rent to Parisian students was noted G on the Energy performance diagnosis (DPE). A note that has been worried about you since the promulgation, in 2021, with the climate and resilience law, which gradually prohibits the rental of thermal colanders. The classified G -classified accommodation has been prohibited from renting since January 1, 2025. But that does not concern you, the note of your Studette having passed at F in 2024. This, without you having undertaken any energy renovation. The improvement of the note owes nothing to magic, it is to be put on the account of the new DPE calculation method, which entered into force in 2024.

Since its redesign in 2021, the calculation of the DPE has proved unfavorable to the accommodation of Less than 40 square meters Because, at a number equivalent to occupants, the needs in domestic hot water were similar, regardless of the size of the accommodation. For small accommodation, the energy consumption necessary for the production ofDomestic hot water was thus disproportionate, compared to that of larger goods. By correcting this, the reform of the DPE of 2024 allowed a well -classified G to automatically obtain a note F, recalls the thermal design office Casam, in a press release published this Wednesday, July 16.

New DPE: 1 housing in 2 heated to electricity will see its improved note of a notch in 2026

Improvements of DPE notes reserved for very small homes

With the new calculation of the DPE, announced in early July by the Prime Minister in early July and which will come into force on January 1, 2026, most of the very small dwellings will see their note further increased by a notch, says Casam. Indeed, this new reform aims to put on an almost equal footing the different heating modes, while that of electricity was penalized by the overhaul of the DPE of 2021. The coefficient of conversion of electricity in the calculation of the DPE, currently fixed at 2.3 (against 1 for natural gas), will be lowered to 1.9 to January 1, 2026. “”70% of small apartments are heated today using electric radiators»»explains Casam. Consequence, with this reform of the conversion coefficient of electricity, the energy consumption of your Studette of 15 square meters “Will be reduced by 17%, to 406.7 kWh/m2/year”, Calculate Casam. This will allow it to obtain the letter E, awarded for energy consumption less than 421K Wh/m2/year.

A relief for you, which can continue to rent it until January 1, 2034, the date from which the rental of classified goods will be prohibited, while this will be the case from 2028 for F. “With the favor of two successive reforms of the DPE, this type of property will have won up to two energy classeswithout the owners having to carry out work ”underlines Julien Besnard, founder of Casam. While recognizing that this is “Of an infrequent case, specific to goods of less than 15 square meters, or less than 25 square meters as soon as they are located more than 800m altitude”.