Why Conforming Loan Limits Differ by County

A conforming loan limit is not a single nationwide ceiling in every location. Federal law establishes a baseline and allows higher limits in qualifying high-cost areas, reflecting differences in local housing costs.

Baseline and high-cost calculations

FHFA calculates the baseline conforming loan limit under a statutory formula and adjusts it annually based on changes in average U.S. home prices. For high-cost areas, the limit can rise with local median home values but is subject to a statutory ceiling. Separate provisions apply in Alaska, Hawaii and certain territories.

County and property size matter

A property's county or county-equivalent area determines which local limit applies. Limits also vary by the number of units in the property, with higher limits for two- to four-unit properties. The annual FHFA table should be consulted for the correct year and unit count; do not assume a neighboring county uses the same limit.

Conforming does not mean government-insured

A conforming loan meets applicable loan-size limits and other requirements for potential purchase by Fannie Mae or Freddie Mac. It is not necessarily an FHA, VA or USDA loan, and meeting the dollar limit alone does not guarantee that a loan qualifies for sale to an Enterprise. Underwriting, property and documentation rules also apply.

A loan-officer workflow

1. Identify the property's county or county-equivalent area.
2. Confirm the loan's calendar year and expected acquisition or origination treatment.
3. Use the correct unit-count column in FHFA's table.
4. Compare the requested amount with that area's limit.
5. Check other investor and underwriting requirements before describing the loan as conforming.

Why county-level limits exist

The national baseline follows the statutory annual adjustment formula. For an area where 115% of local median home value exceeds the baseline, FHFA sets a higher limit under the high-cost formula, subject to a ceiling. This means counties with higher local housing costs may support larger conforming balances than the baseline, but only within statutory limits.

FHFA compares county median home values within metropolitan and micropolitan areas and uses the applicable local-area figure under its methodology. The table is published by calendar year and unit count. A lender should not rely on an old county spreadsheet when a new annual table is available.

Use the table correctly

First identify the property county or county-equivalent area. Then identify the unit count—one through four—and the year applicable to the loan. Compare the original loan balance against that cell in FHFA’s table. A duplex has a different limit from a single-unit home in the same county.

Also verify whether the relevant limit is for loans acquired in that calendar year and how the agency’s current program uses the table. The loan being below the limit is necessary for the size criterion but does not satisfy every Fannie Mae or Freddie Mac underwriting, property, or documentation rule.

Conforming, jumbo, and government-insured are different labels

A loan above the applicable conforming limit is commonly called jumbo for conventional agency purposes. A loan within the limit is not automatically an FHA, VA, or USDA loan; those programs have separate eligibility and insurance or guaranty requirements. Likewise, a below-limit conventional loan can fail agency underwriting for reasons unrelated to size.

For exam questions, define the property location, unit count, and year before selecting a dollar amount. If the question asks why limits vary, explain the local high-cost adjustment and statutory ceilings, not merely “because each county chooses its own limit.”

Annual updates and special areas

FHFA adjusts the baseline annually under the HERA formula using average home-price changes. High-cost limits depend on local median values and are capped; Alaska, Hawaii, Guam, and the U.S. Virgin Islands have special statutory provisions. The exact table applies to mortgages acquired in the calendar year listed, so an originator should verify the relevant year rather than reusing a prior-year figure.

FHFA publishes county and county-equivalent values as downloadable tables and maps. If a property spans a boundary or county assignment is uncertain, confirm its official county before quoting the limit. The unit count also changes the allowable balance, so a two-unit property cannot be checked against the one-unit column.

Example and common errors

Suppose a one-unit property is in a county where the 2026 limit exceeds the baseline. Compare the requested original balance to the county’s 2026 one-unit value. Do not compare the appraised value or purchase price to the limit; the relevant figure is the loan balance under the agency rules.

Do not call every loan below the limit “agency approved.” The size test is one condition among underwriting, property, documentation, and sale requirements. And do not assume a loan above the limit is impossible; it may be eligible for a jumbo product or a different government-backed program under that program’s own rules.

Use the calendar-year column correctly

FHFA’s tables identify limits for mortgages acquired in a given calendar year. A loan originated late in one year but expected to be delivered or acquired in the next may require checking the applicable agency delivery and acquisition rules. Do not assume that the calendar year of application alone selects the correct limit.

The limit is based on original loan balance, not the home’s appraised value. For multiple-unit properties, use the correct unit count. In designated territories, statutory special limits apply. Save the FHFA table used in the file because annual values change and a later lookup may no longer show the historic threshold.

A safe lookup workflow

Open FHFA’s current-year conforming loan limit table, select the correct property county and unit count, and note whether a high-cost or special statutory limit applies. Compare the original principal balance with the applicable limit. If the loan is above that amount, it may be classified as jumbo for conventional-conforming purposes, but that label does not decide whether a government-backed program is available. Check that program’s separate rules.

Annual limits change, and the county table is tied to a calendar year. Record the year and source used in the loan analysis, especially near year-end when application, closing, delivery, and acquisition dates may differ. Do not substitute a statewide average or neighboring county’s number. A loan amount at the threshold is assessed against the limit itself; the property’s value and the borrower’s equity do not raise the conforming loan limit.

Exam takeaway

County limits reflect local high-cost adjustments under a federal formula. Confirm the year, county and number of units; a conforming limit is not the only eligibility test.