The company, which owns and operates three luxury all-inclusive resorts on the Caribbean island, will unveil the plans in 2023 to mark its 40th anniversary and the brand’s 30th year of operation in Saint Lucia.
Sandals Halcyon Beach resort will add 25 new rooms in February 2023, consisting of 20 beachfront, two-story villa rooms and five Rondoval suites.
Elsewhere, a village, comprised entirely of 20 Rondoval suites, will be built at Sandals Regency La Toc, with seven offering open air rooftop decks.
Set to open in 2023, the "resort within a resort" concept will be built adjacent to the golf course, each suite with its own golf cart and butler service, as well as dining and entertainment options.
Later phases will include additional spa facilities, new suite categories and a reimagination of the current golf course offerings.
SRI executive chairman Adam Stewart said the brand’s commitment to working alongside the government to "make real the promise of tourism in Saint Lucia" has been "unwavering".
"My father loved Saint Lucia and like so many, was originally captivated by its beauty," he added. "But he quickly came to understand that the real treasure of Saint Lucia are its people – friendly, hardworking, and industrious.
"People are the inspiration and the source that make investment possible, and the reason Sandals Resorts will continue to grow here."