In this paper, the object of analysis is the company valuation and the comparison of the selected methods of the valuation. The assessment process itself is a very challenging task in which it is important that the assessor is professional, thorough and objective. In order for the obtained value to be reliable, it is necessary to select appropriate methods of valuation and gather as much information as possible about the business and the environment of the selected company. For the purposes of the valuation, the book value method, the discounted cash flow method and the residual income method were selected in this paper. After a detailed analysis, business projection and value assessment, the hypothesis that the application of different methods results in different estimated values of the company was confirmed. Each of the methods implies different assumptions, therefore the book value method uses the information from the past recorded in the balance sheet and does not take future business events into account. The discounted cash flow method is based on the future cash flows that an asset could potentially produce. The residual income method is similar to the previous one, but relies on the book value of capital instead of the residual value. However, those methods should be thought of as guidelines whose application does not necessarily lead to a credible result, and the estimated value should be considered a starting point for negotiations between the seller and the buyer.