Blackhorse Mills Walthamstow E17 Timeline News and progress updates from Blackhorse Mills new development in Walthamstow E17 Post a new milestone New on Buildington! Legal & General's first build-to-rent development Blackhorse Mills is set to open this autumn. A mix of Studio, 1, 2 and 3-bedroom apartments will be available for rent.... 15/05/2019 by Buildington