Australia About 6% Local home buyers in Australia are also facing relatively higher interest rates, averaging close to 6%. Housing markets in both the U.K. and Australia are very sensitive to interest-rate changes by the central bank because changing rates quickly affect variable-rate loans, which are common in those countries. In the U.S., homeowners with 30-year mortgages are less likely to be affected by fluctuating interest rates because they usually have fixed-rate loans.