Plans and details for the 225 million five-year programme of works, which include major upgrades to indoor and outdoor public spaces, were put on public display this morning (30 January). A planning application is expected to be submitted this summer.The jointly designed scheme will see the Lakeside, Foyer and Conservatory spaces overhauled with accessibility, environmental and structural improvements, while removing more recent internal additions to the Grade II-listed centre, such as lighting.Complete restoration of the Conservatory glasshouse will open the space for the public full-time following the works, when new stairs and lifts will give access to upper levels of the Conservatory.AdvertisementA separate events space also features in the proposals, with a pavilion-like structure set to occupy a fourth floor level looking over the greenery.Currently, the Conservatory is only open on Sundays. The AJ understands about 20 per cent of the current glass roof is damaged and at the end of its lifespan. Glazing will be replaced and recycled as part of the job.In the Foyer, removal of a mezzanine would reveal the Barbican Centres iconic concrete columns and double-height main spaces, the plans suggest, while improving wayfinding and circulation.There will also be improved lighting, tech upgrades and better accessibility, include more toilets.In the Lakeside area, fountains will be upgraded to provide better cooling in summer and the brickwork will be replaced with new waterproofing underneath.AdvertisementPhilippa Simpson, director of buildings and renewal at the Barbican, said: The Barbican has always been about renewal, a beacon of an optimistic future in the wake of the Second World War. This project is rooted in the vision and ambition of its founders, to reimagine what an arts centre can be in the 21st century a vital, creative space for everyone.She continued: This consultation is vital to ensuring the plans reflect the needs of audiences, while celebrating the history and heritage of this special site.In December, the City of London Corporation approved an allocation of 191 million for the Allies and Morrison and Asif Khan Studios revamp of the Barbican Centre. The AJ understands about 20 per cent still needs to be found.Allies and Morrison and Asif Khan Studio beat four other teams to land that major refurbishment job in 2022, when it was then valued at up to 150 million. Engineers Buro Happold and landscape designers Harris Bugg Studio are also working on the scheme.The Barbican Centre was designed by Chamberlin, Powell and Bon and opened in 1982. In 2001 it was Grade II-listed alongside the rest of the Brutalist estate.Allford Hall Monaghan Morris (AHMM) completed a 12.6 million overhaul of the complex in 2006 before creating a 3.4 million street-level cinema complex. Ruff Architects carried out an environmental upgrade of the centres main art gallery in 2019.Three years ago Diller Scofidio + Renfros 288 million, 14-storey London Centre for Music on the Museum of London site was axed in favour of an upgrade to the Barbican Centre.Subject to planning permission, construction is expected to begin in 2027, with a first phase complete in time for the Barbicans 50th anniversary in 2032.