In the latest sign of the slowdown in the property market, the average UK house was listed for sale at £301,973 in the month to August 11, down from £309,191 in July, according to figures from Rightmove.
The fall was led by London, where average asking prices fell by 3.1% to £609,205, and the southeast, where prices dropped by 2.3% to £402,562.
A combination of rising mortgage costs and subdued demand have been blamed for house prices rising at their slowest pace in almost five years, according to official figures released by the Office for National Statistics and the Land Registry last week.