The theatre, which has hosted famous faces such as David Bowie, Kate Bush and Michael McIntyre, will be launching the corporate events space with Event Magazine's annual Event Awards on October 14. Bookings will be available from early 2016.
The development will include a high-tech adjustable floor, which can be installed overnight to change the sloping view, good for watching gigs, into a split-level flat floor, ideal for seated events for up to 720 people.
The venue's modular flooring, which can be moved in and out, will be able to accommodate a range of events, from awards ceremonies, to weddings, to fashion shows.
The announcement comes as the Eventim Apollo celebrates two years since its multi-million pound refurbishment that saw its name change from the former Hammersmith Apollo.
Heiko Kacimi-Alaoui, deputy general manager of Eventim Apollo, said: "The venue resonates with so many different people so we wanted to convert it into a multi-purpose space which was accessible for all kinds of corporate entertaining.
"Our hope is that this exciting new development will ensure that Eventim Apollo continues to serve as a premium live event space for many years to come."
45 Queen Caroline Street, Hammersmith, W6 9QH - 020 8563 3800