The 8.65-hectare property, offered through Inglis Real Estate, fetched a record price.
It has three pavilion-style detached cottages, as well as equestrian facilities including a stable complex with seven boxes, show jumping and dressage arenas, and a 20-horse arena.
There is also a chicken coop and hydroponic house, fed by a spring well.
Ashbrooks Farm was sold by jumper Chris Rosen-Harris, the widow of trainer Heath Harris.
Their extraordinary colonial recreation of the historic three-pavilion Balala homestead in Uralla, New England, the idea for their property in the Central Coast hinterland began with conceptual drawings by designer Peter Thurgel, then built by Mark Vandenberg and Mark McKenzie.
Three separate pavilions are built around a garden courtyard and connected by a covered promenade.
The main pavilion has dining, living and kitchen spaces. The adjacent pavilion has two guest rooms, offices and laundry, a recreation of the station store and bookkeeper's residence in Balala.
Another wing with separate dormitories is based on the schoolhouse and teacher's residence at Bharara.
All feature milled hardwoods on the property and Queensland sandstone inlays.
It was briefly sold in 2012, when it was priced at $3.8 million.