Abstract: The subject of the research is the types of decorative and applied art, the connection of decorative and applied art with the interior design of residential and public spaces. Special attention is paid to the fact that in modern interior design, the tendency to transform interior space using decorative and applied art objects is widespread, which determine the overall style of the room, despite the particular academic design style used in the project. The author examines in detail such aspects of the topic as the influence of the author's thing on the exclusivity of the project, giving a typical interior individuality by including an object of decorative and applied art made specifically for this room, or competently selected by a specialist taking into account the specifics and purpose of the room, the transformation of the project from a typical to an individual one. The author analyzed and systematized modern methods and techniques of introducing the author's art into the interior design of premises for various purposes. Based on the results of the study, a general methodology was formed and proposed for integrating things into the interior of the proposed spaces, the concept of transforming rooms using objects and techniques of decorative and applied art. The main conclusion of the research is that the author's art object of decorative and applied art, created in a certain way and integrated into the interior design, allows to form a certain concept of a thing in the interior, a philosophy or even your own unique and recognizable author's style. The novelty of the research lies in determining the current trend of integrating handmade objects into the interiors and spaces of residential and commercial premises for various purposes in order to give uniqueness, which contributes to the development of the design industry and art in general.