British finance minister George Osborne said on Sunday that homeowners would face a "significant hit" from lower house prices and higher mortgage costs if voters decided to leave the European Union in a referendum in June.
"This isn't just a big question about who we are as a country. This goes to the heart of people's financial security," Osborne said in an interview on ITV television.
"I am pretty clear that there will be a significant hit to the value of people's homes and to the cost of mortgages. That is one example of the kind of impact, economic impact, that we get from leaving the EU."
Osborne and Prime Minister David Cameron have put the economic risks of a so-called Brexit at the heart of their campaign to keep Britain in the EU before the referendum on June 23.