Labour and the Conservatives have set out rival plans to tackle England's housing shortage.
Jeremy Corbyn promised the biggest affordable house building programme since the 1960s, including 100,000 new council houses a year by 2024.
Boris Johnson announced measures to help first-time buyers and boost private house building, promising a million homes over the next five years.
Labour's Angela Rayner said the state was going to take "more direct control" of housing adding that "the market hasn't delivered".
"Many families are in sub-standard accommodation, paying huge amounts of money for it," she said.
Asked about his party's policy, Mr Johnson said those renting would be helped "to get the high-value mortgage they may need to buy the home".
"We believe in home ownership. We think it's the right way forward," he said.