Real estate: how much is your property worth if you undertake energy renovation work?

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A study of the order of notaries compares selling prices and energy performance of a dwelling. Doing energy saving work could boost the value of your property … up to 22%!

It has become essential today for selling your home. The energy performance diagnosis (DPE), mandatory since 2006, must be carried out for all homes intended for sale or rent. Its display has even become mandatory on ads since 2011. The real estate is thus rated according to a letter, between A for the most energy-efficient, and G for the "thermal sieves". Each note represents the quantity of greenhouse gases emitted per year and per unit area (in kg CO2 / m2 / year), as well as the annual energy consumption (in kWh / m2 / year). If we could already suspect the importance of this note when selling or renting a property, it is now confirmed by a study of the Order of Notaries of France, published November 20. To obtain these results, the document, entitled "The green value of housing in 2017", is based on the information available in the notarial databases.

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And the figures revealed are impressive. With regard to the individual park, the old houses labeled A or B sold on average from 6% to 14% more expensive than the houses of label D with comparable characteristics, in 2017. Good to know: the discount increases with the age of the houses. On the side of collective dwellings, the old apartments labeled A or B sold on average 6% to 22% more expensive than apartments classified D. In general, for newer dwellings, those built since 2001, the added value 5% for class C and 10% for class A or B, compared to class D. A previous study of French notaries estimated that the value of a property was increased by 5% for each level climbed. That's 30% if we go from G to A!

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Ecological imperative

As a reminder, homeowners undertaking an energy performance diagnosis may benefit from a tax credit for the energy transition. This amounts to 30% of the audit expenditure. A help far from negligible since according to a recent study by Ademe, a public body responsible for controlling energy, earning a class of ECD, that is to say going from C to B for example, requires an investment almost 16,000 euros.

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Better insulating old homes can therefore relieve the portfolio, but also reduce CO2 emissions. In 2017, more than one-third (39%) of the homes sold were classified D. And the most energy-intensive homes (E, F or G) accounted for 38% of sales. This leaves only 1 housing out of 5 (22%) sold with a label A, B or C. Another study of the Ademe completes these figures. Homes built before all building standards would account for 65% of the energy consumption of the main home park. The trend is however to improve. Since 2014, the proportion of less good labels (F and G) has decreased by 5 points and that of the best labels (A and B) has increased by 2 points

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