Despite a depressed resale market, a buyer paid S$1.1 million to purchase the 28th floor unit.
That sale has netted current owner, Mr Tan, a profit of S$300,000.
He bought the DBSS flat at S$700,000 when it was launched in 2008.
Resale flats in central location have been known to fetch a premium.
In March this year a top-floor unit at Cityview @ Boon Keng was sold for S$1 million after being listed for just 2 weeks on the market.
Prior to that, another 5-room flat at City View @ Boon Keng changed hands at S$855,000.