The work "Development of a web application for real estate sales" focuses on the development of a comprehensive web application that enables efficient management of the real estate sales process. The application provides various user roles, including administrators, sellers/clients, and guests/customers. Sellers can create their own profiles, present properties through catalogs with images and descriptions, and send invitations to clients via email to promote properties. Guests have the option of contacting the seller via e-mail when they are interested in certain properties, in order to get in further contact with the seller. C#, .Net and Angular technologies are used to develop this application, providing a modern and intuitive user experience. This paper explores the application development process and functionality, highlighting the importance of connecting sellers and buyers through a digital platform for faster and more convenient real estate trading.