China’s billionaire software king Wang Wenjing and his wife Sonia Yan Song have put their waterfront home in Sydney’s Mosman on the market and could double their money.

Wenjing founded software company Yonyou in 1988 and is the chairman and chief executive officer. He has an estimated US$2.4 billion wealth ($3.4 billion), according to Forbes.

The five-bedroom, five-bathroom house is an investment property for the couple, and a sale could fetch many millions. Listing agents reveal “price hopes are in the mid to high teens”.

Records show the abode with spectacular harbour views was purchased under Sonia’s name for $7.1 million in 2014.

Occupying four levels, there are two kitchens, a library, expansive glass, soaring ceilings, lift access, a pool, spa, barbecue terrace, private boat shed and launching ramp.

Jason Roach, who holds the listing alongside John Tower of Tower & London and is accepting expressions of interest, said: “It’s a remarkable waterfront mansion that has been closely held for more than a dozen years and coveted by many for decades. It is a genuine Mosman waterfront with direct access to Quakers Hat Bay.

“Regardless of the current property climate, we have been impressed with the quality and have been overwhelmed with the quantity of interest in the home. That interest is being received from both local and international buyers including expatriates looking for a generational home.”

**Tech exec’s sale defies the stats **

North Curl Curl, in Sydney’s northern beaches, has had the deepest home value falls from their recent highs, according to the latest Cotality data, but one vendor has done quite well.

Tamie Minami, a board director at Teijin, a technology and manufacturing conglomerate, sold her clifftop home in the suburb this month for about $9 million, a week after its auction.

North Curl Curl has dropped the most from its recent cyclical peak, according to Cotality data. Since September, dwelling values in the suburb have fallen 19.4 per cent, or almost $790,000, to a median value of $3.28 million at the end of July.

James Eyden of Clarke & Humel Property, who sold Minami’s house this month, said of the sale: “The property sold one week after the auction. With the buyer’s guide realigned from $10 million to $9 million, a sale was in close range.”

The four-bedroom, four-bathroom residence was bought by Japan-born Minami for $6.25 million in 2017, records show. A renovation was completed three years ago, with work including a new kitchen and paving.

Design notes for the two-level property include expansive glass to enhance the northerly views that stretch from Long Reef Headland to the Central Coast, a statement Calacatta marble island in the kitchen, timber floors, plantation shutters and terrazzo floors in the bathrooms.

There is a 25-metre lap pool and al fresco zones to kick back and relax in style.

Minami is listed as director, audit and supervisory committee member at Teijin. The business’s website says its purpose is “pioneering solutions together for a healthy planet”. It offers products and services spanning apparel, healthcare, electronics and energy, among others.

Minami joined Teijin in 2023 as a director. She previously held roles at 3M, an American conglomerate, including vice president for the Latin America and Asia regions.

**Elizabeth Bay’s ‘rare gem’ for sale **

A grand manor in Elizabeth Bay with a storied past could change hands again, and is going to auction in September with a guide of $30 million.

Records show current vendors, retired financial advisor John Pooley and his wife Pru, bought the abode for $1.1 million in 1988. They are downsizing locally.

The couple restored the property to its former hotel glory in 2020, but due to COVID, it never resumed operation as a hotel. However, the buyer could make this dream a reality, with an active liquor licence in place.

The five-level residence was a family home from 1890 to 1920, three whole-floor apartments from 1920 to 1940, and an upmarket private hotel from 1940 to the 1980s.

There is now a lift, new bathrooms, grand formal rooms, original timber floors, marble fireplaces, plantation shutters and chandeliers. Leisure zones include a rear courtyard with room for a pool, and wraparound verandahs.

Simon Exleton of Pillinger is selling the home and said of the property campaign so far: “The high level of initial interest is not surprising for this address opposite Elizabeth Bay Marina – a rare gem indeed.”

An apartment on the same street is also on the market with a price guide of $21 million to $23 million. David Griffith, a yachtsman and intellectual property law veteran, and his wife Penny, are selling their penthouse apartment.

It happens to be in the same complex where Cate Blanchett and her husband Andrew Upton own a $1.92 million investment property.

More: