EN
In the paper a possible theoretical approach of residential environmental research is outlined. The paper also deals with the application of the resulted model in the case of concrete neighbourhoods. The model is based on the Coleman system behaviour model, which emphasizes the fact that the macro level changes always happen with the 'mediation' of the micro level. The decisions brought on the micro level under the conditions set on the macro level add up on the aggregate level again and produce a new structure in society and space. The aim of the research the model is used in is to explain the differences in the trajectories of different residential areas of originally nearly the same age, architectural design and social composition in Budapest. In the applied twinning residential environment dynamics model the classic Coleman-model is doubled. It is due to the necessity of combining the individual mobility and investment mobility trends, that together give dynamism to the neighbourhoods and other larger or smaller scale spatial units of residential function. Besides the general model a neighbourhood specific application of the model is presented on the rehabilitation process of Middle - Józsefváros, a classic downgrading area, where a few years ago a large scale renewal process was initiated.