The paper analyses the specific definition of the term party to the procedure in issuing building permits in compliance with the provisions of the Construction Act. Even though the General Administrative Procedure Act (GAPA) regulates prerequisites for departures from the provisions in special legislation, special regulation of administrative proceedings in accordance with provisions of individual special laws is a departure from, and even contradictory to, the aforementioned provisions of the GAPA. Such departures have also been observed in several provisions of the Construction Act and this paper analyses them considering the party to the procedure in issuing building permits. Although the GAPA has provided the appropriate regulation of the notion of the party and defined the means which may be applied in the administrative procedure to obtain a building permit, the legislator has opted for special regulation through provisions of the Construction Act, regardless of the fact that justification and purpose of such special regulation is nowhere required or presented. In order to additionally present issues related to relevant regulation of the notion of the party in accordance with the provisions of the Construction Act, the paper reviews regulation of the party in sources of the EU law, in relevant case-law, and within the framework of an empirical research. It emphasises the question of purposefulness of special regulation regarding the notion of the party to the procedure in issuing building permits. In order to test the hypothesis presented in Introduction, the author uses inductive and deductive methods, analysis and synthesis, as well as descriptive statistical methods to interpret some of the results of the empirical research for the purpose of this paper. Grammatical, logical, and teleological interpretation methods are used to interpret the sources of law.