Former HUDC estate Rio Casa was on Monday (Apr 10) put up for collective sale, announced its marketing agent Knight Frank in a news release. Owners of the river-fronting estate along Hougang Avenue 7 are expecting offers above S$450.8 million for the property, which translates to a land rate of about S$586 per square foot per plot ratio, according to Knight Frank. The price includes about S$141.5...