What is the most expensive 4-room HDB flat?

The most expensive 4-room HDB flat transactions have been notable in recent times. For instance, three four-room flats from The Pinnacle @ Duxton were sold for at least $1.4 million each. Additionally, a four-room HDB flat at 79 Dawson Road was sold for $1.125 million, which is one of the highest prices paid for a four-room flat this year. However, the highest recorded price for a 4-room HDB flat this year is $1.4 million for the flats at The Pinnacle @ Duxton.