My feeling is that the market will hold up until it begins to appear to be contracting, at which point there will be a sudden glut of properties hitting the market as people rush to unload at the peak before the value of their property falls by too much.
Which will, of course, cause the value of property to fall sharply...
Which will cause more owners to try to sell quickly...
Classic positive feedback loop - read up about tulip mania in the 1630s
Property is seriously over-valued at this time, simply because people are prepared to pay the prices - low interest rates, and a rising market powered by new investors clamouring to climb on the bandwagon have made it so. It can only last at the cost of increasing inflation, which is generally considered to be a Really Bad Thing.