'Redlands', widely viewed as one of the most impressive properties in the Southern Highlands, is to go on the market for $3.75 million.
Michele Scamps, who owns the property with her husband Dale Goodman, said the couple were planning to build a "completely different" style of property to replace their luxury home.
Ms Scamps said she was expecting plenty of interest in the elegant four-bedroom property on the corner of Oxley Drive and Duke Street, which will be marketed by Bowral agent Michael Maloney of Richardson and Wrench within the next fortnight.
Since purchasing the prestige Mittagong property eight years ago, the Tudor-style house has been extensively renovated while the spacious kitchen has been used as a base for Ms Scamps' cooking schools.
Set on three acres of picturesque woodland garden designed by Paul Sorenson - referred to by many as Australia's master gardener - the Redlands estate is said to be an important example of his early work.
Ms Scamps said the couple had recently purchased another plot of land on the northern side of Mount Gibraltar on which to construct their new home, which will differ dramatically to ‘Redlands'.
"While this sort of home would not be seen as out of place in Sydney, it could be viewed as different in the Southern Highlands," she said.
"It might not be as imposing as ‘Redlands' but it will possess many of the latest environmentally friendly features.
"But we're not in any hurry to move and I'm looking forward to getting involved in this new project of designing and building a home.
"I have been told that ‘Redlands' is one of the most impressive properties in the Southern Highlands and for that reason I would be very surprised if it didn't sell quickly."
Ms Scamps estimated a two-year timescale for the construction of her new dream home.
The couple have an eight-year-old daughter, Alice, who is said to be excited at the prospect of moving house and has already provided her parents with a long wish list of requirements, most of which have been rejected, Ms Scamps joked.