UK's most expensive street named

Courtenay Avenue in N6 is the most expensive place to buy a home in England and Wales with the average property on the road worth £6.8 million, according to property valuations group Mouseprice.

The figure is well up on the average price of 2007's most expensive street, Kensington Square, with house prices averaging £5.5 million.

The group said it was also the first time in the survey's three year history that a street in Kensington and Chelsea had failed to take the top slot.

Courtenay Avenue, which runs between Highgate golf course and Hampstead Heath, is described by the group as a "leafy cul-de-sac, housing a number of large, detached properties, many of which have swimming pools and sizeable gardens", while green space is "abundant" in the area.

It also runs parallel to The Bishops Avenue, which is known as Billionaire's Row and is home to the most expensive house ever sold in Britain after Toprak Mansion changed hands there for £50 million last month.

But Mouseprice said Bishops Avenue itself had failed to make it into the top 20 most expensive addresses because it had some cheaper properties on it.

The group based its research on Land Registry data on sale prices, which it indexes in a bid to iron out distortions caused by low levels of transactions.

Chelsea Square, in the borough of Kensington and Chelsea, was named the second most expensive address, with the average home there worth £6.4 million. The square, which contains 1930s three-storey brick terraces around a central green, retained its number two position from last year, but average prices have soared by 26% from £5.5 million then.

Manresa Road - which runs into Chelsea Square - was the third most expensive street to buy a home in, with its 1950s terraced houses and flats, including ones converted from the old Chelsea College of Art, averaging £6.2 million.