"This is an area of Auckland that truly reflects the most attractive attributes of the city and we will complement that with distinctive accommodation, backed by quality 5-star service.
"We expect the hotel to become as much a destination for New Zealand travellers as overseas visitors and over the next month we will launch a new restaurant and relaunch the spa centre, which will be one Auckland's most desirable urban spas," Richardson said.
Wouter de Graaf, general manager of the Sofitel Queenstown Hotel & Spa, will move to Auckland to manage the property.
Rooms will start at $299 a night.
Accor previously had only the Queenstown hotel under the Sofitel brand.
The Auckland property was originally developed by Nigel McKenna's Melview Developments but was marred with disputes over payments from the former management to investors who own rooms.
The hotel had three names during a short period, changing from Westin Lighter Quay last autumn to Viaduct Harbour Hotel in July then Hotel Lighter Quay in September.
Behind the name change was a fierce fight as room owners demanded payments and became so disenchanted that they split away from Westin and carved out a separate lodging business, undercutting the Westin by charging cheap rates.