Media giant UBM is paying an initial £31m for the green exhibition plus a performance payment of up to £20m over the next 12 months.
UBM has snapped-up Ecobuild’s owner International Business Events Limited as rival exhibitions like Interbuild continue to struggle.
Ecobuild is held annually in March at London’s Excel Centre and attracted 55,000 visitors this year generating revenues of £9.4m.
UBM now plan to launch Ecobuild shows globally with the first overseas event next year in Shanghai and plans to double the size of the UK show within the next four years.