The businesswoman, who runs MJM International that makes the Ultimo underwear brand, put the 12-room mansion on the market in around May 2012 following the break-up of her marriage to Michael Mone, her former business partner.
Telperion in Thorntonhall, South Lanarkshire, was on sale for offers in excess of £1.65 million, but the base price has now been scaled back to £1.5m.
A source confirmed that Ms Mone, 41, wanted to reduce the price of the house to ensure a quicker sale. Both parties are said to be keen to move on with their lives.
Ms Mone has bought a house in the west end of Glasgow and has a flat in London, and her former husband has embarked on a relationship with former employee Samantha Bunn.
Advertised for sale with Savills, the property was substantially refurbished by the couple and includes a long room furnished in the style of a lounge bar. It is also equipped with a pink-walled home cinema containing a 63-inch screen and rows of seating for up to eight guests.
The five-bedroom property is situated behind security gates and also boasts a vast family dining kitchen and is opulently furnished.
There is a sophisticated entertainment and music system that extends to most of the rooms and the back garden.
However, potential buyers are told in the brochure that some of the custom-built high-quality finishes are available by separate negotiation.
Security includes panic buttons and a CCTV system that, according to the estate agent's blurb, can be monitored by smartphone from anywhere in the world.
The brochure describes the house as situated in an area frequently referred to as one of the UK's wealthiest and most desirable enclaves.
Miss Mone's company is awaiting the outcome of an unfair dismissal hearing brought by former MJM director Scott Kilday, 35.
A tribunal in Glasgow last week heard evidence that Mr Kilday had been bugged by the businesswoman and a fellow director over fears he may have been attempted to leak confidential information to rivals.
Mr Kilday left East Kilbride-based MJM shortly after it was taken over by MAS Holdings and works for a venture set up by Mr Mone. A judgment is expected before the end of the year.