The current 2006 Fannie Mae/Freddie Mac loan limit for a single-family home is $417,000 and is higher in Alaska, Guam, Hawaii, and the U.S. Virgin Islands. The Fannie Mae loan limit is $533,850 for a two-unit home; $645,300 for a three-unit home; and $801,950 for a four-unit home. Also referred to as the “conventional loan limit.”