Sir Robert McAlpine has been appointed to carry out the redevelopment of the old Inner Temple buildings in the City of London.
The site is used by barristers and the project will see refurbishment of its library, hall and treasury building.
Along with modernising the buildings and adding a fourth floor, new education facilities including a lecture hall will be built.
The Honourable Society of the Inner Temple, which has commissioned the work, said Sir Robert McAlpine had a strong track record working on heritage buildings. The firm is currently refurbishing the Elizabeth Tower at the Palace of Westminster and the Royal Albert Hall.
Work is scheduled to start by June and be completed in 2021. The redevelopment has been designed by Hugh Broughton Architects and managed by Bradbrook.
Last week Sir Robert McAlpine won an £86m contract to redevelop Intu’s Broadmarsh shopping centre.
The start of the year saw Edward McAlpine take up the role of chairman of the firm after Gavin McAlpine stepped down to focus on the company’s renewable energy business.