This article examines energy audit procedures as a crucial instrument for raising building and business energy efficiency in European Union (EU) Member States. Energy audits, which include technical, economic, and environmental aspects, are essential to reaching the EU’s climate targets, which include increasing energy independence and cutting emissions by 55% by 2030. The study highlights how crucial energy efficiency initiatives are to combating climate change, cutting energy use, and advancing sustainable development. A thorough examination of methods, financing sources, and legislative frameworks reveals differences in how Member States carry out directives such as the Energy Performance of Buildings Directive and the Energy Efficiency Directive. A case study on Latvia is included in the article, highlighting the country’s energy audit regulations, implementation difficulties, and successes. This study applied a bibliographic methodology or review of the scientific and other relevant literature, analyzing sources identified through targeted keyword searches in academic databases and a variety of online sources, including official legal websites, handbooks, reports, plans, and other publicly available digital resources. The integration of energy efficiency principles and country performances are compared using data from the Odyssee and Mure databases. The results highlight how important it is to standardize energy auditing practices, promote information sharing across national borders, and move past obstacles like public resistance and budgetary limitations. Policy recommendations to improve energy efficiency and aid the EU’s transition to climate neutrality by 2050 are included in the research’s conclusion.