Fannie, Freddie Conforming Loan Limits Mostly Unchanged for 2015. The Federal Housing Finance Agency this week said that conforming loan limits for Fannie Mae and Freddie Mac in 2015 would remain at current levels in most markets. For much of the country, the conforming loan limit for one-unit properties will remain at $417,000. The loan limits are established under the terms of the Housing and Economic Recovery Act of 2008 and are calculated each year.