Supply vs demand.
Yes a lot of supply is coming on stream, but the demand is so freaking huge it's not funny. EVERYBODY I know who is >20 years old to even 50 years old is thinking of buying and investing in property. This type of groupthink is unheard of 10 years ago.
There are many many cash rich folks out there. Even those who lack cash, I have personally witnessed some super garang types who will go to 5 or 6 different banks, borrow unsecured loans at 8-12% INTEREST, just to pay for that downpayment!
And appreciating property prices create a vicious cycle. Many people are taking equity loans against their appreciated properties, and using them to buy more properties! Even though this is not allowed in law, but the money will somehow end up back in the market chasing prices higher and higher.
Funny thing is, properties are like Veblen goods now. The more the price goes up, and the more difficult it is to buy one (via CMs), then the more people are willing to pay higher prices to own one. Nobody wants to miss the bandwagon this time.
For prices to come down, the following conditions must be satisfied
1. Singapore's PAP lose election (<10% probability)
2. Population regresses to 4 million (0% probability with PAP, <10% without)
3. HDB BTO prices drop drastically (0% probability, with or without PAP)
4. Casino licenses are withdrawn (0%)
5. We lose F1 hosting rights (20%)
6. Interest rate go above 5% (<30% in next 3 years)
So there you have it. Not only will prices rise, they will continue unabated until 2016 at least.
But as always, it's your money so you do your own homework
