Plans to convert a former bank into four flats have been approved by Chichester District Council.
The application for Flint House, in South Street was given the nod by planning inspectors.
The Grade-II* building used to house the Royal Bank of Scotland but has been empty since 2018.
The planning application includes the removal of an external spiral stairway attached to a link extension which was built to the rear of the house in the 1960s.
Instead, a three-storey extension containing a new stairwell will be built.
A report from the planning officer said: “The extension has been sensitively designed, would not be widely visible, except from within the enclosed courtyard, and serves a practical purpose of replacing the 1960s stairwell which falls below current standards.
“As such,it is considered to be a necessary intervention, which would have a limited impact on the heritage asset.”
A design statement from Rodway Planning Consultancy Ltd said the basement of Flint House will be converted into a wine store/ home cinema/playroom/gym.
As for the flats, there will be one three-bedroom home on the ground floor, two two-bedroom homes on the first floor, and one two-bedroom home on the second floor.