Energy certification of buildings in Latvia was started in 2010, but until 2016 energy performance certificates (EPC) were issued in paper form, and there are no data about number of certificates in this period. Since 2016, EPC of buildings should be registered in the Construction Information System (BIS). 1702 valid EPC of residential buildings were registered in BIS in 2023. 94% or 1599 of residential buildings’ EPC were issued to multi-apartment buildings and 6% (103) to one- and two-apartment buildings. The dynamics of issuing EPC for multi-apartment buildings is very uneven. It can be explained with the implementation of EU funds programme, as an EPC is a compulsory requirement to receive co-financing. The purpose of energy certification in most cases (97.1%) was voluntary (included certification for EU funds programme), in 2.7% of cases compulsory (state or local government buildings), and 0.2 % of cases an EPC was used to sell the building. 55% EPC corresponds for the E class buildings (heating consumption (HC) >125 kWh/m2 a year), 32% for the F class buildings (100≤HC≤125 kWh/m2), 7% for the D class buildings (80≤HC≤100 kWh/m2), 4% for the C class buildings (60≤HC≤80 kWh/m2), and only about 2% of buildings correspond the A and B classes (HC≤60 or HC≤40 kWh/m2). 87% of residential buildings correspond to the two lowest EPC. The average heating consumption level in multi-apartment buildings is 137 kWh/m2 a year. According to the Ministry of Economics, oneapartment houses are much less efficient than multi-dwelling buildings.