A tree in Surrey has been valued at £500,000 by the county council.
The Oak in Weybridge has been assessed according to its size, health, history and how many people live nearby.
The tree is thought to be about 300 years old but Surrey County Council said it would not be able to get an exact figure without damaging it.
Under a new valuation system brought in by the authority, the link between high value trees and subsidence must be proved before they can be felled.
Trees are often cut down after being blamed for subsidence, when other factors may be responsible.
Full article from the BBC: http://news.bbc.co.uk/1/hi/england/london/7506610.stm