155 Bishopsgate will offer a single floor of contemporary, large-scale space for up to 550 delegates, 50 exhibition stands and an adjacent networking 'galleria'.
Alastair Stewart, Etc Venues' managing director, said: "Great feedback and strong demand for our St Paul's venue, 200 Aldersgate, which we opened in March 2012, has encouraged us to open a further large venue specifically designed for larger groups and events.
"The market for larger conferences and exhibitions is changing fast, with organisers coming out of recession now hungry for new and exciting spaces that will help them put on memorable conferences, exhibitions, events and meetings.
"Our approach takes that innovation challenge head on and our design team have unveiled a spectacular interior design and layout.
"155 Bishopsgate keeps us on track to continue the 20% annual growth rate we've achieved over the past few years and sustains our ambition to become a £50m turnover business within the next five years."