The site is located at 51 Kalinda Rd, Bar Point and is only accessible by boat.
The Lazzarini family purchased the site in 1999 for $50,000, and it is adjacent to a shared marina.
The site is adjacent to a shared marina with one allocated berth.
Since 2021, five of the 260 lots have sold for more than $1 million.
The waterfront reserve is located in a sought-after location on the east side of Bar Point, with views across the Hawkesbury River to Milson Island, the listing reads.
"Situated on the banks of the Hawkesbury River, Bar Point is a tranquil bushland, accessible only by water, where you can leave the stresses of city life behind.
Fishing, swimming, boating, canoeing, water skiing, bushwalking, sailing or just relaxing, and with Mooney Mooney or Brooklyn just a short boat ride away and the city about 60 minutes away by train or car, it's a great holiday destination.
According to PropTrack, only two homes in Bar Point have changed hands in the past 12 months.