Detailed plans for a £2.3m revamp of King’s Lynn Town Hall have been submitted for planning approval.

West Norfolk Council is seeking help from the Heritage Lottery Fund to transform the 600-year-old building into a “destination heritage attraction,” with extended facilities and improved access.

The plans were submitted to the council’s own development department last week.

If the project goes ahead, “limited and sensitive” building work will be carried out at the town hall complex, a cluster of four historic buildings including the Old Gaol House and the 800-year-old Guildhall.

“The aim is to have the town hall once again at the centre of town life, engaging with a diverse audience of locals, tourists, schools, young people, volunteers and current non-users,” a report supporting the application says.

“The proposals will enable the residents of King’s Lynn and visitors to again marvel at the splendour of the Grade I and Grade II listed Guildhall and town hall while enjoying full interaction with the exhibits.”

At the heart of the revamp is the Stories of King’s Lynn project, which will explore the town’s rich past through the eyes of the people whose lives are recorded and reflected in the archives and collections.

The borough council also hopes to link the town hall complex with other attractions and heritage sites in the area, using it as a history hub.

A new archive collection area with a flood barrier is proposed along with a new external lighting scheme, a garden, coffee area, staircase and lift.

The Old Gaol House would be better integrated while an undercroft would be opened up to make way for the Stories of King’s Lynn exhibition.

A decision on the council’s funding application is expected by June.