Jeremy Corbyn has urged Theresa May to pledge to reduce homelessness and the number of children without a home to call their own next year.
The Labour leader also labelled the Government's housing record an "absolute disgrace" and asked when it will "get out of the pockets of property speculators and rogue landlords".
Prime Minister Mrs May countered by claiming house-building and social housing reduced under the last Labour administration, adding: "Labour would produce failure for this country once again."
Housing dominated the pair's exchanges at Prime Minister's Questions, with both marking the impending six-month anniversary of the Grenfell Tower fire tragedy.
Mr Corbyn defended the previous Labour government's record on homelessness, saying it reduced it by two-thirds.
He added: "When Labour left office, the number of children in temporary accommodation was a lot less than it is now.
"I asked the Prime Minister for a pledge to reduce the amount of homelessness next year - the pledge was not forthcoming.
"128,000 children will spend Christmas without a home to call their own - 60% up on 2010.
"It's too late for this Christmas, but will the Prime Minister promise that by Christmas 2018 fewer children will be without a home to call their own?"
Mrs May replied: "We, of course, want every child to wake up in their own home, particularly at Christmas.
"But it is incredibly important people know they can keep a roof over their heads, even in the most desperate circumstances.
"That's why we're making sure councils can place families in a broader range of homes if they fall into these circumstances."
Mr Corbyn said the "sad reality" is one in 100 children is homeless at any one time in the country, adding: "It is a national disgrace and it is getting worse."
He also asked Mrs May to "apologise" and outline when she will deliver one-for-one replacement for every council house sold under the Right to Buy scheme, claiming just one in five has been replaced.
The PM, in her reply, said: "We actually want to give people the opportunity to buy their own home, the Labour Party would take that opportunity away from them."
