LONDON (Reuters) - Annual house price inflation fell to its weakest rate in a year in November, data showed on Monday, providing further evidence the property market is cooling fast.

The Department for Communities and Local Government said house prices rose 9.5 percent in November compared to a year ago after a 11.3 percent increase in October.

The figures are based on sale completions and thus lag other surveys.

However, they tally with a growing weight of evidence that tighter credit conditions and affordability constraints are taking a toll.

"The data strongly reinforce the overall evidence that the housing market lost significant momentum in the latter months of 2007," said Howard Archer at Global Insight.

Annual house price inflation in London slowed to 14.1 percent in November from 17.7 the previous month but remained well above the national average.