Over 280,000 homes could be built above London’s railway tracks December 18, 2018 India Block Architecture, Architecture Article, Architecture News, Home design ideas, Interior Design 0 More than 280,000 homes could be built in unused space above train tracks, tube lines and the overground network in London according to engineering firm WSP‘s Out of Thin Air – One Year On report. Read more Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window) Related Londonnews