Extra storeys could be added to London's homes, shops and offices without planning permission if Conservative Party plans get the go head.
Housing Secretary James Brokenshire has announced a "building up" proposal which could offer a solution to London's Housing crisis.
He told the Conservative Party conference in Birmingham: "We need to be smarter on how we use land and space and look at land that's already built on. That's why I am publishing proposals to permit people to build up on existing buildings rather than build out."
An analysis by property firm Knight Frank in 2017 found that London had the capacity for 40,000 new homes by putting modular blocks on top of flat roofs.
Apex won the 2017 WAN Urban Challenge with a rooftop development scheme
that was an innovative way of utilising London’s existing assets to deliver new homes for both the private market and affordable housing provision.