As of 2015, the maximum general loan limit for a conforming loan on a single-unit residence is $417,000 in the contiguous states, Puerto Rico and the District of Columbia, according to FannieMae. For Alaska, Hawaii, Guam and the Virgin Islands, the limit is $625,500 for a single-unit property.
The maximum amount in the contiguous states, Puerto Rico and D.C. is $533,850 for a property with two units. The limit for three units is $645,300, and the limit for four units is $801,950. For areas dubbed "high cost" in the contiguous states and D.C., the single-unit loan limit is $625,500, according to FannieMae. The double-unit limit is $800,775.