In the 21st century is still more and more emphasis laid on the phenomenon of Business Process Management. In a great number of corporations it plays the key role, because it makes the overall performance of the organization more effective and it is able to react flexibly in the rapidly changing environment. The main purpose of this graduation thesis is to get the reader to know the meaning of the notion "business architecture -- its structure and roles in the process management. The main task is to design business architecture of the specific field of business and try to implement it in the real and existent or emerging company subjects, offering the real-estate services. As a result of this, we prove the usefulness of the process management and business architecture as a key factor of reaching the effectivity in dynamic, rapidly changing and competitive environment. The thesis is divided into two parts. The theoretical part provides us with methodical data and the practical part with the design of business architecture of a subject, actively operating in the real-estate market. Graphical figures are also the part of the thesis using CABE tool ProVision by Metastorm Corporation.