The hotel, which overlooks Lake Windermere, will close for three months while work is carried out to upgrade bedrooms and add a new restaurant, outdoor leisure facilities and a spa.
A new building containing another 32 suites and studio rooms, a club lounge and roof garden will open in the summer following completion of the first phase in April.
Simon Berry, chairman and MD of English Lakes Hotels Resorts & Venues, said: “It is a really exciting new chapter for us here at Low Wood Bay. This stunning building has been here for over 300 years and this will be the biggest change it has gone through in its history.
“The Lake District is a uniquely beautiful holiday destination and we’re creating an exceptional, stand-out resort from which to enjoy it. We want to make something truly special, bringing modern, top quality facilities to the area but without compromising the integrity or charm of this historic building; we really feel we have achieved that with these plans. We can’t wait to welcome our guests, both old and new, to see their reactions."
English Lakes Hotel Resorts & Venues, which owns the property, has worked closely with the Lake District National Park Authority to progress the plans and create a ‘world class destination’ whilst remaining in keeping with the area and using local connections and expertise.
Renovations include the addition of the spa, which will feature an outdoor heated infinity pool, sauna, steam room and Canadian hot tubs and new restaurant concept Blue Smoke, a South American grill concept using British produce.
Low Wood Bay Resort & Spa is one of five hotels owned and run by English Lakes Hotels Resorts & Venues owners the Berry family.