When it opens the hotel, located within the Syon Park estate, will be the first new-build Waldorf Astoria property outside of the US.
It will boast 1,000sqm of event facilities including 450-seater ballroom and a rooftop lounge for 64 standing.
General manager Dale MacPhee told Event: "The team are working tirelessly to ensure that the first guests to visit London Syon Park A Waldorf Astoria hotel have the very best experience from this superb addition to Hilton Worldwide's luxury portfolio.
"It is not unusual for there to be a delay with a new hotel development as it is a complex project, particularly with the many detailed finishing touches - from the landscaped gardens to the indulgent spa - all of which are being meticulously managed, as they work toward the launch of London's finest contemporary country retreat," he added.
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