Practice appointed to design transformative rethink of grade II*-listed Art Deco landmarkHistoric England describes Norwich City Hall as one of the most significant municipal buildings of the interwar periodNorwich City Hall's main entranceOne of two lions which flank the main entrance of the building1/6show captionHawkins Brown is working up proposals to reimagine Norwichs grade II*-listed City Hall with a planning application set to be submitted towards the end of this year.The practice was appointed by Norwich council earlier this month to draw up concept designs for a transformative refurbishment of the 1930s Art Deco building which could include a substantial extension.The scheme would also include a new public square and wider public realm improvements aiming to anchor City Hall at the heart of the city centre, according to council documents.The council headquarters, known for its grand five-storey exterior and 56m-tall clock tower, is considered by Historic England to be one of the finest municipal buildings of the interwar period.Opened by King George VI and Queen Elizabeth in 1938, it was designed by architects Charles Holloway James and Stephen Rowland Pierce in an austere style inspired by Nordic architecture including Stockholm City Hall.One of two lions which flank the main entrance of the buildingWhile the building and its clock tower has long served as a symbol of Norwichs cultural identity, the council has said it is inefficiently used and needs significant investment to fully realise its potential to be a driver for community pride and growth.It also has high running costs, costing the local authority around 2m a year to operate and maintain in its current state.Councillors have dismissed a do-nothing approach to the building and are now considering revenue generating opportunities at the site including the creation of lettable grade A office space and spaces for events and conferences.A more ambitious approach would also include a large mixed-use development attached to the rear of the building on a site which the council has described as currently unattractive and underdeveloped with no economic or place benefits.Norwich City Halls main entranceA rear wing, which could include a hotel, housing, retail or offices in the proposed scheme, was intended in the original 1930s designs for the building but was never built.The council is seeking views through a public survey on the range of options and said current plans for the site are purely embryonic.Hawkins Brown has been working on the project since early last year, when it was appointed to draw up a strategic outline case and brief to RIBA Stage 1. It was appointed again this month to progress the concept design stage to RIBA Stage 2.The council said it is exploring various options for delivery of the project, although there is no development partner currently appointed.