A new enormous American-style brasserie will open at 20 Hanover Square in October (it’s proving to be a very busy month).

The Maine, a 350-cover restaurant, will be split over three levels, residing in one of Mayfair’s only surviving Georgian ‘Grade II’ listed buildings, which dates back to 1720 and is the former homestead of the Duke of Montrose.

The building has been reimagined by founder Joey Ghazal in collaboration with London-based designers Brady Williams. It will will be the first time the site has been used as a social dining and entertainment destination.

“Divided across three levels with five distinct spaces – including a brasserie, tavern and secluded year-round terrace – every part of the house, including its somewhat hidden entrance, has been carefully designed with a fun, discerning London audience firmly in mind,” an announcement said.

The Maine has been described as a “blend of old-world British elegance, New England extravagance, and subterranean decadence.”

It was also said to be unpretentious and accessible, though we haven’t yet seen any menu prices. Either way, fans of martinis, oysters, and late-night cocktails will surely be intrigued.