This study examines the impact of the Mini-Holland Programme, an active travelinfrastructure intervention, on residential housing prices in Outer London boroughs.The programme, aimed at promoting walking and cycling, may have unintendedeconomic consequences. Employing a Difference-in-Differences approach and anevent study design, I analyse housing price data from 2002 to 2022. My findingsindicate a statistically significant 10% increase in housing prices in boroughs affectedby the programme, with the effect becoming evident post-announcement in 2014.These results suggest that while active travel infrastructure can enhance urbanmobility and health, it may also contribute to rising housing costs, potentiallyexacerbating socio-economic disparities. Further research at the micro-level isrecommended to fully understand the socio-economic long-term and distributionaleffects, while policymakers must aim for the benefits of improved infrastructure whilelimiting potential displacement effects on lower-income residents.Â