Developers are seeking permission to convert the historic Grade II-listed Duffield Hall into a sumptuous four-bed home.
Derby-based Wheeldon Brothers are proposing the change of use at the mansion, which was until 2011 the headquarters of Derbyshire Building Society.
Plans also include demolishing a 1970’s call centre building and replacing it with a garage, swimming pool and workshop.
In addition, the old Derbyshire Building Society Headquarters offices would be knocked down and a mix of nine bungalows and houses built in its place.
An application to Amber Valley Borough Council stated: “The design intent is to change as little as possible in order to see the Hall become a comfortable four bedroom home.”
It continued: “The site is now dominated by the mass of the defunct office building which was built in 1976 to designs by George Grey and Partners.
“Prior to that the site had been essentially grounds to the Hall. Whilst it has been executed with a corporate and robust integrity, its location so close to the Hall is considered to be incongruous and oppressive.
“It clearly impacts negatively on the setting of the Hall. Its use has ended and no new user can be found .”
In 2011 it was announced about 180 jobs will go at Duffield Hall and the remaining 140 staff will be offered positions elsewhere in the Nationwide.
Duffield Hall is thought to have been built in the 1620s for the Newton family.It was later home to several High Sheriffs. The house was occupied by St Ronan’s School from the 1920s until 1970.