The work is based on the EU Directive 2012/27/EU concerning energy efficiency. One of the objectives for energy efficient solutions is improvement of existing district heating systems. Compared to individual boilers, district heating ensures a low-carbon and cost-effective way to heat buildings. In order to determine what would make significant improvement in the existing heating system and to identify what specific energy efficiency measures can be applied, it is necessary to evaluate the current situation. The study identified the potential heat consumers in the Salaspils municipality through a software of geographical information systems. With the help of a created heat map it is possible to determine the areas where it would be beneficial to extend the existing district heating network or vice versa. During the study, the comprehensive assessment of the efficient district heating potential for exploitation is made based on the data of consumer location and building characterization. The methodology for assessment of heat consumption that has been developed in this study is based on the European Commission's methodology for determining the comprehensive national heating potential. The study emphasizes identification of consumers and methods for their mapping and assessing possibilities of district heating potential in the respective region.