The cafe perched near the cliff edge at Birling Gap is having a refurbishment, courtesy of the National Trust.
Work at the beauty spot starts this week and continues through the spring and summer.
Birling Gap welcomes more than 350,000 visitors every year and has outgrown the existing facilities.
The works will include expanding the café to include an improved seating area, servery and a new ice cream parlour serving Sussex ice cream, sundaes and treats.
There will also be a new shop offering souvenirs and gifts, and an information centre where visitors can discover the wildlife, people and natural processes that have shaped the local landscape.
The ice cream parlour will open in April 2013 and the improvements will continue throughout the year culminating in the new information centre opening in March 2014.
Zara Luxford, operations manager for Birling Gap, said, “It is really exciting to see the building works get underway with the promise of great new facilities later in the year.
“These works will give Birling Gap the facilities visitors have been asking for and we hope will bring a new lease of life to the site.”
The National Trust hopes to keep disruption to a minimum but as part of the works the café will not be serving hot food from March 11-15, although hot drinks, cakes and sandwiches will still be available.
The café will be closed on March 12.
For further information about the improvement works and general details about the site visit www.nationaltrust.org.uk/birling-gap-and-the-seven-sisters