The remarkable social urban rehabilitation effort of the Gyor Municipality which has recently been implemented and is currently in progress led to the considerable development of Gyor-Újváros, not only in the renewal of the actual built environment but also in the social improvement of the inhabitants. In our study we will look at the Gyor urban development project in three dimensions. First we explore its feasibility. Why is it Újváros that needed rehabilitation? Strategic documents and relating statistics prove the choice feasible: it is the place where the most significant segregation can be found in Gyor that needed intervention. Secondly, we analyse the intervention of the urban development. What were the changes, how did they affect the built heritage and the social status of the inhabitants of the area? Based on the available documents and reports we can state that significant results were achieved both concerning the built heritage and social adjustment and development. In the framework of empiric research, we examine through comparative analysis the conditions before and after the rehabilitation taking into consideration two aspects (modification of hard infrastructure and the modification of the soft factors) and 7 allocated indicators (I.1. Number of flats, I2 Number of businesses, I3. Level of convenience, I4. Surface area of the flats, I5. Rent prices, I6. Applicants receiving regular support, I7. Applicant receiving temporary support). Data are available partly from the feasibility study and partly from the data services of the Gyor Municipality. Result show that regarding several factors, rehabilitation had a positive effect in the neighbourhood. As a result of the rehabilitation the built environment has gone through significant improvement in case of six blocks of flats. The number of businesses for rent has increased, the convenience level of flats has changed positively too, as all flats have all modern conveniences and in most cases the surface area has also risen, thus providing better housing. Parallel to this the social status of the inhabitants living in this area has also improved as both the regular and temporary applicant receiving support has dropped significantly. Due to rehabilitation the rents have tripled after renovation which can be put down to the significant rise in standards.