In the past few decades, urban regeneration policies have taken firm root in many Western European countries. Underlying these regeneration policies is a strong belief in the negative neighborhood effects of living in areas of concentrated poverty, often neighborhoods with a large share of social housing. In Europe, great importance is attached to creating a more diverse housing stock (in terms of tenure and dwelling types) as a means to establishing a more socially mixed neighborhood population. Mixed-housing strategies are embraced explicitly by governments in Finland, France, Germany, the Netherlands, Sweden, and the United Kingdom. The idea is that mixing homeowners with social renters will create a more diverse socioeconomic mix in neighborhoods, removing the potential of negative neighborhood effects. By far the largest tenure-mixing operation in Europe is the Right to Buy (RTB) scheme in the United Kingdom. Since the 1970s, more than 2.7 million socially rented houses have sold at large discounts, mainly to sitting tenants. In this article, we synthesize the outcomes of RTB with regard to neighborhood effects: residualization, neighborhood stability, tenure and social mix, social interactions, and dwelling maintenance. Although we acknowledge substantial socioeconomic benefits of RTB for many individual residents, we find that the neighborhood outcomes of RTB are by no means solely beneficial.