On Sydney’s Lower North Shore, a large waterfront estate known as Burnham Castle hat hit the prestige market guiding $18 million. The 1887-built abode comes with a pool, tennis court, 30-metre frontage to a private beach – plus a three-storey Italianate turret.

Occupying a hefty 2346 square metre parcel on the banks of the Parramatta River, the mansion occupies the largest private residential landholding in the little-known harbourside suburb of Henley, a peninsula which sits between Huntleys Point and Gladesville.