The Chatsworth Renewable Energy Centre will be officially opened today.
Its low carbon heat and power system will feed 97% of electricity and 72% of heating to the 300-room house, garden, shops and restaurants.
The centre has been funded by an attic sale of items in 2010. It has cost more than £2.5 million to build.
The Duke of Devonshire, said: “By using funds raised from the attic sale the past is playing its part in providing Chatsworth with a sustainable future by helping reduce our carbon footprint and supporting the on-going maintenance of our woodlands and ecosystem.”
Chatsworth House in Derbyshire will open a special exhibition on Saturday 27th July to mark the bicentenary of Jane Austin's classic Pride and Prejudice.
The stately home is widely regarded as Austen's inspiration for Pemberley, the home of Mr Darcy. Chatsworth was also used as a setting for the movie starring Keira Knightley.
Most, if not all, of your Christmas decorations are probably down by now - but when you've got 300 rooms and 30 trees, it's a bit more of a chore.
Chatsworth House in Derbyshire closed to the public on December 23rd, and has 3 months to take down it's festive decorations and clean those hard to reach places. Michael Sibert has more.
Chatsworth House in Derbyshire is starting its anual deep clean today after the festive period.
Every year a team take down the last of their Christmas decorations and begin their cleaning process.
This is the last of the 30 trees to be taken down, which have been up since the beginning of November.
30,000 books have to be dusted in the library and the crystals on their huge chandeliers have to be cleaned.
The house has 300 rooms, hundreds of windows, miles of carpet and dozens of curtains.
Panto season is around the corner, as is Christmas, but it seems celebrations have already begun for both in one part of the Midlands.
At Chatsworth House, the stately home in Derbyshire, the classic stage stars are sharing rather a lot of space with baubles, tinsel, snow-flakes, fairies and anything else festive you can think of.
The theme this year is pantomime with 13 of the rooms themed differently, with planning taking the staff a year.
There are over 20 trees at Chatsworth House this year with over 21,000 baubles and 7,000 lights.
For more information on visiting Chatsworth House see their website here.
It's expected that thousands of visitors will head to Chatsworth House over the next three days for the annual country fair.
Organisers are hoping numbers could be up this year, with some sunshine expected over the weekend.
Chatsworth House has just been voted the UK's favourite stately home in a Which? magazine poll.
Chatsworth has been rated Britain’s favourite stately home in a report published by the consumers organisation, Which?Read the full story ›
The Olympic Torch is currently in Chatsworth before heading to Bakewell.
Guests at Chatsworth House today were invited to tea on the lawn.
The 1950s themed celebration allowed guests to watch the Diamond Jubilee proceedings in London on the Big Screen.
A giant 1950s street party took place at Chatsworth House today, with a 100 metre long decorated table with union jacks, bunting and flags.
The Queen's Ceremonial Day is being broadcast on the big screen and visitors have worn vintage dress to celebrate the event.