In order to promote the ecological transition, cities are investing in greening and providing public transport in their territory. However, the greening of neighbourhoods and their connection to public transit leads, through land capitalization mechanisms, to “eco-gentrification” phenomena. To reconcile sustainable development of cities with social diversity, possible solutions exist, including increasing the supply of off-market housing, regulations to influence the behaviour of developers and private owners, or the facilitation and acceleration of approval processes for new real estate projects.