The energy certificate is mandatory in new buildings and used from the time they are placed on the market for sale or rent directly by owners or real estate agents. The document must be presented at the conclusion of the purchase contract / sale, lease or rental, attesting to the information released initially on the energy class for which the property belongs.

It is a document that evaluates the energy efficiency of a property on a scale of A + (very efficient) to F (inefficient), issued by authorized technicians ADENE. It contains information about the energy consumption characteristics of the air conditioning and hot water. It indicates improvement measures to reduce consumption. The document is valid for 10 years.

Since 2008, when it became mandatory to energy certificate presentation, the Concexpla has qualified experts in their technical staff.