Investors are obliged to carry out construction processes based on the binding rules and regulations. However, these regulations are constantly evolving and subject to various attempts of improvement. Therefore, the aim of this article is an attempt to present the changes that have recently occured in the Polish process of construction process of a single-family residential building, in the context of proceedings before architectural and construction administration authorities. Basic legal acts regulating this procedure have been amended, such as: the Construction Law Act and the Regulation of the Minister of Development on the detailed scope and form of a construction design. Since these regulations have changed their provisions many times over the years, the article focuses on the changes that entered into force during 2020 and 2021. An additional aim of the article is to check and show how these changes were adopted by both investors and participants in the construction process, such as designers. In order to achieve this goal, a survey was conducted among them in Mał opolska region. The data concerning the submitted applications for permits for the construction of a single-family residential building, within the mentioned years, have been analyzed.