A major £20.6m renovation of the National Indoor Arena (NIA) in Birmingham is set to deliver improved facilities and a greater emphasis on the pre- and post-show experience.

Designs for the scheme have been drawn up by Broadway Malyan, with work due to commence in late 2012 and help transform the venue into the "next generation of arena" for the city.

The modernisation plans have been designed to make the most of the NIA's canal-side location and include a new entrance from Brindleyplace offering glazed views over the water and city.

An extra 5,926sq m (63,787sq ft) of pre- and post-show retail opportunities will add to the 7,500sq m (80,729sq ft) of refurbishment work planned at the NIA, which has not received any improvements since first opening in 1991 but is now looking to safeguard its long-term future as a major sports and entertainment facility.

Birmingham City Council leader Mike Whitby said: "The NIA is already one of the central features in our world-class events and conferencing offer, as well as a vital asset for our economy generating £150m in economic benefit.

"By integrating the redevelopment into our Big City Plan we will seek to maximise the impact of this very exciting new development."

NEC Group Arenas managing director Phil Mead added: "As well as improving the facility for performers and promoters, developing the experience for our customers is also top of the agenda.

"Our venue of the future will feature a new look and feel on the concourse with more choice for visitors in terms of food, beverage and merchandising."