The diploma thesis deals with the definition of the concept of interior design, author, style as a basis for defining author's design. The observation of various stylistic and expressive means in general and their application in interior design. The practical part is focused for the search for a semantic form, shaped by theoretical knowledge to create a space. The main goal of the diploma thesis is to design the concept of author's design of office space for the IT department of Evosoft. The solution underlined by the author's handwriting tries to create a suitable environment for IT employees. The result of the work is an artistic author's solution, materialized by technical documentation and visualization of a selected part. The work is a reaction to the opposed ideas appeared in the studio work concerning the author's own opinion.