Chief Secretary to the Treasury Danny Alexander says Help to Buy "is not fuelling a housing boom" and dismissed calls for the mortgage scheme's limit to be cut.
Currently, mortgage guarantees are available for homes valued up to £600,000 - but Mr Alexander insists that the scheme is primarily helping people at the lower end of the market.
"What people should take confidence from in these figures is that Help to Buy is helping 95% outside of London, and it is helping people on low and middle incomes," he said.
"The average house price for people who are buying a property under the [mortgage] scheme is £150,000."
More top news
The man identified as the Islamic State militant known as "Jihadi John" was a "popular" schoolboy who loved Manchester Utd and S Club 7.
Everton, the only British side left in the Europa League, have been handed a tough tie against Dynamo Kyiv in the last 16 round
Ukip remains the party most trusted to control immigration despite more people seeing them as racist, a ComRes/ITV News poll has found.