For most of the country, Fannie Mae and Freddie Mac limit loan amounts at $647,000 for one-unit properties (or single-family homes). Amounts over that will require a non-conforming or 'Jumbo' loan. There are exceptions to this if a home is located in a 'high-cost county.' Those counties are primarily located in Northern & Southern California and some counties surrounding Denver, Boston, Nashville, and Seattle. In these areas, conforming loan limits are $970,800. The Federal Housing Finance Agency or FHFA is the federal agency responsible for setting these limits, which they reevaluate annually.