The isolated hotel was built in 1929 and inspired an Agatha Christie novel.
Burgh Island hotel in Devon has been taken off the market after securing £5.4m in refinancing and additional funding from Metro Bank.
The art deco hotel, which is situated on a private island and inspired Agatha Christie’s novel Evil Under the Sun, was put on the market for £15m last May.
Funding will be used to refurbish the 25-room hotel, upgrade its infrastructure and support its sustainability drive.
This will include preserving its large collection of art deco antiques as well as its architectural features and original Crittall windows.
New water treatment works have already been completed and a new front roof is expected to be finished by late September, while work on sea defences to prevent cliff erosion is ongoing.
Renewable energy sources, such as solar water and ground source heating, will be used throughout the hotel where possible.
It comes after £3m staff accommodation on the mainland was completed last year in response to a shortage of housing for hospitality workers in the south west of England.
Giles Fuchs, owner of Burgh Island hotel, said: “I am delighted to announce that I will be continuing as the owner of Burgh Island.
“The refinancing agreed with Metro Bank will facilitate further investments in the hotel and enhance its infrastructure, services and beauty while maintaining its art deco authenticity and commitment to sustainability.”
Burgh Island hotel was advised by Westfort Advisors.