The 30-year fixed-rate came in at an average of 4.28%, according to Freddie Mac's weekly survey. That's down from 4.37% last week.

Meanwhile, 15-year fixed rates, popular with homeowners refinancing their loans, were at 3.32%, down from 3.39% last week.

Rates have been affordable all year -- from a low of 4.23% to a high of 4.53% -- as the economic recovery has failed to pick up much steam.

"Mortgage rates were down this week as real GDP was revised downwards to 2.4% growth in the fourth quarter of 2013