Dual key condos are basically a single unit comprising 2 separate homes that share both a common main door and foyer. It’s actually a very useful layout for those who are looking for multi-gen living for more privacy, or if you want to have the flexibility to rent out part of your home for income in the future. The first concept of this was introduced in Singapore in 2009 Caspian by Fraser Centrepoint (this was 2 years before the ABSD implementations). Because of the ABSD ruling, it was so popular that in 2013, 1 in 13 units or 7.5 percent of units launched was a dual key unit! (This was an increase from an average of 3.4 percent in 2011.) At the peak of its popularity, dual key units were commanding price premiums of as much as 16 percent. Today, a dual key unit is still very much a useful option for a select group of buyers. And with an increasingly ageing population, perhaps even more so. The problem?...