Currently the hotel has 95 bedrooms, a restaurant and bar, meeting rooms, a spa and swimming pool.
A £3.9million extension will bring an additional 39 bedrooms. The new rooms will be split equally across three floors and will be constructed at the far end of the car park near the hotel entrance.
The project is planned for completion by September 2017.
The hotel is the former Sheffield Park Hotel. It reopened as the DoubleTree by Hilton Hotel Sheffield Park in 2011. It is located in Chesterfield Road on the south side of Sheffield.
