The $4.75 million penthouse for the Sage by Moran retirement village over Cronulla beach is one of eight apartments sold before construction starts.
Prices for the other 36 two and three-bedroom independent living apartments in the nine-storey building, start at $1.85 million.
Sydney South Planning Panel (SSPP) approved the development application (DA) following late design changes to the rooftop pavilion.
SSPP said Sage by Moran breached the maximum building height for the site, but the DA was acceptable because the amended plans addressed the overall design and development objectives and generally complied with the council rules.
"It has been a long road to obtaining the approval but the support of prominent community and business leaders as well as many local residents was instrumental in achieving this much sought after community amenity," said Retirement by Moran CEO Sally Taylor.
More than 60 pre-registered potential buyers attended the sales launch at Cronulla RSL Memorial Club just before the four-week COVID-19 lockdown was imposed.
"More than 30 expressions of interest were registered for the future apartments," she said.
"In five days, we sold eight apartments and a further 24 appointments were booked for the following two weeks.
"COVID means that we doing appointments by video until parties can come to our display suite at 30 Croydon Street."
The existing building will be demolished this week and the project is expected to be completed in November 2022.
