The survey also revealed that London properties were now selling, on average, 12 days quicker compared with November with the average completion taking around 97 days.
Russell Jervis, Managing Director of haart, said: "Overall, the number of properties sold and listed are down because Christmas is a notoriously quiet period for the property market.
"However, the good news is the statistics show a marked increase in the asking price. A 3% increase shows steady and sustainable growth and we anticipate increased stability in the London property market over the coming months. This is good news for those looking to buy and sell property during 2010."
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