The 25 bedroom hotel – which sits in 150 acres of historical parkland – received planning permission this week to redevelop its walled garden with a state-of-the-art cookery school and additional events space and accommodation, a grand marquee for up to 400 guests and a visitor centre, which will include a café, farm and gift shops and a delicatessen.
At the centre of the development will be a new rose garden with water features, statues, Italian terraces and picnic areas.
The new grand marquee means the hotel will now be able to host much larger conferences and events. The scheme will see the marquee in place by winter 2013, with the rest of the project due for completion within two years.
Paul Mackings, chief executive for Cameron Hall Developments, which owns Wynyard Hall, said: "We want Wynyard Hall and its grounds to be a place for everyone to enjoy.
"We intend that the new rose garden and visitor centre will be somewhere that people will want to visit time and time again.
"Alongside the pure enjoyment of visiting the gardens throughout the year we also hope that our passion and commitment to providing the widest of rose species will encourage interest for horticulturists both here and abroad."