Recently, U.S. lawmakers asked Freddie Mac and Fannie Mae to loosen recently tightened standards for mortgages on new condominiums.

In March, Fannie Mae said it would no longer guarantee mortgages on condos in buildings where fewer than 70 percent of the units have been sold, up from 51 percent. Freddie Mac is due to implement similar policies next month, the paper said.

The concern over the new standards is that they could further impede the slow recovery of  the housing-market as the 70 percent threshold could be too burdensome and could further negatively impact the condominium maket.

In addition to the 70 percent sales threshold, Fannie Mae also will not purchase mortgages in buildings where 15 percent of owners are delinquent on condo association dues or where one owner has more than 10 percent of units, as the firm sees these as signals that a building could run into financial trouble, the paper added.