In the last 10 years, Istria is experiencing real expansion in the construction of the accommodation facitities needed in tourism. Additionally, in the County of Tinjan, there is about 50 accommodation facilities. More and more existing objects gets adapted and reconctructed. Investing in such objects contributes to the economic progress of the country. In this paper, is analyzed one existing object, which is located in the County of Tinjan. In the last 10 years this county is known as an atractive rural, tourist destination. Considering rich gastronomic offer of Istrian konoba and host objects, rural tuorism became one of the strategic options for development the County of Tinjan. The introductory parts of this paper describes desire of the investors for renovation exsisting objects in holiday houses, often pool included. This particular object is incomplet at the moment. Furthermore, in this paper is analyzed valid legal regulation, which is requirement for modification the purose of the object, all with the aim of the categorization in four-star house. Also, here is analyzed valid urban design of the County of Tinjan and, according to conditions and clauses of the plan, made conceptual design. In addition, analyzed is visual review of the status of the object in order to determine the static stability of the object. In this paper, there is draft of conceptual design. In the end, there is discussed conceptual design of the planning building plot and modification of the object, together with the list of expenses and cost estimation of modification the purpose of the object.