Chateau Le Marais, the Fink family's Wallis Island $20 million mansion listing

Chateau Le Marais, situated 300 kilometres north of Sydney on Wallis Island, has been listed for sale.

It's an imposing neo-classical five-bedroom residence built of stone masonry on its 105-hectare estate.

Le Marais, which comes with a 1.5-kilometre beach, is set with an orchard and botanical gardens.

There's also a savanna, and dry and sub-tropical forest, fringed by three ponds, two lagoons and wetlands.

There are deer that can be observed or hunted across the mid-north coast property.

Harcourts Chatswood agent Andrew Huang has the five-bedroom, seven-bathroom listing. The weekend classified paper gave its asking price as in the realm of $20 million.

Former Queen Street, Woollahra, antique dealers Andre and Cecile Fink appear to have offered the mansion for sale without furniture.

It's been their labour of love for 15 years, seemingly taking some inspiration from Le Chateau du Marias, the late 18th-century French castle that replaced the Huraults’ castle, of which nothing remains but the moats and the dungeon on the Marais. Henri Hurault was count of Cheverny and the military treasurer of King Louis XI.

The Wallis Island land cost $290,000 in 1996.

Elsewhere on the island, a 143-hectare parcel of land and an airstrip has been listed for sale. The north-facing site with wharf is surrounded by water and bushland.

It features a 1,500-metre long airstrip and hangar.

"I think it's everybody's dream to own their own private getaway, and this is one with its own airstrip no less," says Godfrey Franz at Matrix Property Group, the marketing agents for the island.

Although the private sanctuary has a master plan concept for a total of seven waterfront residential holdings. Some 87.9 hectares of land and 4.9 hectares of foreshore are zoned to be given back to the community to establish public amenity in the area.

Matrix Property is the marketing agency for the property in conjunction with Ray White Forster.