This paper deals with the description of the existing software solution for the support of emergency interventions and with the description of the performance and functionality of the newly created software solution. At the beginning of the work, the existing solution, its basic functionalities and certain shortcomings are described. In cooperation with the emergency intervention service provider, a specification of requirements for the improvement of the existing solution and maintenance system of residential buildings in the City of Zagreb was carried out. After the specification of functional and non-functional requirements, application usage patterns were clarified with a corresponding diagram. Then the architecture of the system is presented with a layout diagram and each of its elements is shown and explained in detail. The elements are database, models, views and controllers respectively. The following is a presentation of the basic functionality of the order flow with diagrams and an accompanying explanation. Then the functionalities and interface created in the new software solution are shown. After the description of the technologies and tools used comes the conclusion and the literature.