Residential mobility is broadly seen as good from an individual’s perspective, as well as for the functioning of labour markets. Little attention has however been paid to the potential negative externalities that could arise from of high levels of mobility because of disruption, the break-up of ties and social disorganisation. In this paper, we study the impact of high levels of neighbourhood turnover on pupil attainments. While previous studies have documented negative effects in highly mobile schools, our study is the first to investigate this issue in the context of residential neighbourhoods. Using detailed census data, we show that students who do not move experience small, but significant negative effects on test score value added between age 11 and age 14 from high levels of neighbourhood turnover. These negative effects are more pronounced for pupils residing in deprived neighbourhoods, and not reversed when considering turnover that entails a neighbourhood improvement for movers.