Restaurants and bars at the Mandarin Oriental Hyde Park London including Dinner by Heston Blumenthal and Bar Boulud, as well as the spa, are set to reopen on 4 December.
The hotel's guest rooms and suites will reopen Spring 2019.
In an update on the hotel website it said: "We are delighted to announce that Dinner by Heston Blumenthal, Bar Boulud, the Rosebery, Mandarin bar, banqueting and the Spa at Mandarin Oriental, London will reopen on Tuesday 4 December in time for the festive season and our reservations lines are now open. Our guest rooms and suites will be reopening this coming Spring."
Fire broke out at the newly renovated 181-bedroom, five-red-AA-star hotel in Knightsbridge in June, just a week after the hotel had unveiled a multimillion-pound renovation.
All guests and staff were evacuated safely. The blaze is believed to have started when the by-product of welding work landed on the felt lining of a planted wall, setting it alight.