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According to the data provided by the SCE - Sistema de Certifica\u00e7\u00e3o Energ\u00e9tica dos Edif\u00edcios (Energy Certification System for Buildings), the number of certificates issued by energy class since 2014 (data recorded on 10 January 2022) shows that 25% of the certificates issued correspond to buildings in energy class \u2018C\u2019. This is followed by class \u2018D\u2019 with 21.5 per cent and class \u2018E\u2019 with 13 per cent. The class with the best energy performance (\u2018A+\u2019) totalled just 2.5%, while the worst class (\u2018F\u2019) accounted for 7.6% of buildings.<\/p>\n
From 2014 to 2021, around 1,560,105 certificates were issued, according to the same figures, with 2019 being the year in which the most certificates were issued (212,179). In 2014, 179,990 were issued and, in 2021, 202,364. The majority of certificates were issued in Lisbon (407,310) and Porto (263,351), followed by Set\u00fabal (146,038), Faro (142,492) and Braga (112,998).<\/p>\n
As far as residential buildings are concerned, the data shows that 23.3% are classified in class 'D', followed by class 'C' with 22.1% of the certificates. On the other hand, 8.4% of buildings are in the worst energy class ('F') and only 2.8% are classified as having the best energy performance.<\/p>\n
As for service buildings, around 46.5% are in class 'C'. Only 1.2% of the certificates belong to class 'F' and only 0.4% are in the best class ('A+').<\/p>\n
Note that the energy certificate is a document that assesses the energy efficiency of a property on a scale from 'A+' (very efficient) to 'F' (not very efficient). Currently, this certificate costs between 45 euros (residential) and 950 euros (commercial).<\/p>\n