Gentrification is the process whereby the character of a neighborhood changes through the influx of more affluent residents (the "gentry") and investment. There is no agreed-upon definition of gentrification. In public discourse, it has been used to describe a wide array of phenomena, sometimes in a pejorative connotation.
Gentrification is a common and controversial topic in urban politics and planning. Gentrification often increases the economic value of a neighborhood, but can be controversial due to changing demographic composition and potential displacement of incumbent residents. Gentrification is more likely when there is an undersupply of housing and rising home values in a metropolitan area.