Yes, there is finite supply and ever-growing demand, however the price of real estate ultimately reflects both the buyer and lender's confidence that the mortgage payment will be met. This can be affected not only by interest rates but by labor market conditions and other factors.

If there is a sudden surge in interest rates in response to some kind of inflationary shock, or the credit market becomes suddenly much more restrictive in terms of lending standards, then housing prices will most certainly fall, simply because the pool of potential buyers at a given price level is smaller.

When pressures on the housing market are coupled with leveraged loans on variable rates going upside down, people will begin dumping their real estate investments. These factors compound to cause a sharp reduction in price. In 2007-8 metro home prices declined up to 50% from their earlier peaks - but seem to have increased about 200% since the bottom, roughly, to where they are today That's quite a considerable appreciation and seems unlikely to be sustained. Maybe I'm wrong - we're just shooting the shit on Lemmy - but looking at what's happened before, real estate seems overheated - but it may well keep on boiling for all I know.