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Bank of England governor Mark Carney has said he is concerned about the "potential" for a UK housing market bubble, but will tighten lending requirements if necessary.
"There is a history in the housing market of moving from stall speed to warp speed," Mr Carney said. "We want to avoid that."
Meanwhile, a survey suggested house prices will continue "surging ahead".
A separate forecast said borrowing would rise.
Mr Carney was speaking at the Economic Club of New York.
His speech came as the Royal Institution of Chartered Surveyors (Rics) found that more surveyors expected prices to rise than at any time in the last 14 years.
A separate forecast by mortgage lenders predicted that borrowing would keep increasing in 2014.
But the Council of Mortgage Lenders (CML) added an "unbridled" housing boom was "unlikely".
The last time such a clear majority of surveyors expected price rises was in September 1999