Why It Matters
You need to know this number because it draws the line between affordable agency financing and more expensive jumbo territory. In 2025, the baseline limit is $806,500 for a single-family property — but it scales higher for 2-4 unit buildings and reaches $1,209,750 in high-cost counties. Cross it by even a dollar and your underwriting standards, interest rate, and reserve requirements all change.
At a Glance
- 2025 baseline (1-unit): $806,500 — loans at or below qualify for Fannie/Freddie purchase
- 2025 high-cost ceiling (1-unit): $1,209,750 — applies in counties where median home prices are elevated
- Multi-unit baseline limits: 2-unit $1,032,650 / 3-unit $1,248,150 / 4-unit $1,551,250
- Set by: FHFA each November, using the Housing and Economic Recovery Act (HERA) formula tied to the House Price Index
- Rate impact: Jumbo loans typically price 0.25–0.75% higher than conforming — that's up to $6,750/year on a $900,000 balance
- Historical jump: The limit was $417,000 from 2006 to 2016; it has nearly doubled since then
Annual Adjustment = Prior Year Limit × (Current Year FHFA HPI ÷ Prior Year FHFA HPI)
How It Works
The FHFA sets limits every November using a statutory formula. Under the Housing and Economic Recovery Act of 2008 (HERA), the FHFA adjusts conforming loan limits annually by measuring the change in average U.S. home prices via its House Price Index (HPI): New Limit = Prior Year Limit × (Current Year HPI ÷ Prior Year HPI). If prices fall, limits hold flat — they cannot legally drop below the prior year's figure. A county earns high-cost designation when 115% of its local median home value exceeds the baseline; its limit is set at 115% of local median, capped at 150% of the baseline ($1,209,750 for a single-family in 2025). Most major coastal metros — Los Angeles, San Francisco, New York, Seattle, and Boston — qualify at or near that ceiling.
The multi-unit tiers make small multifamily more accessible than most investors realize. The conforming limit scales with unit count, not just geography. In baseline markets, a fourplex can carry up to $1,551,250 in Fannie Mae financing; in high-cost counties, that ceiling reaches $2,326,875. For investors targeting 2-4 unit properties, this keeps them inside agency underwriting — lower rates, standardized DTI review, and access to secondary market liquidity. An investor buying a duplex for $940,000 with 20% down carries a $752,000 loan, comfortably under the $1,032,650 two-unit baseline.
Cross the limit and the math changes fast. Once a mortgage exceeds the conforming limit, it becomes a jumbo loan. Jumbo lenders apply stricter standards: minimum credit scores start at 720 (versus 620 for conforming), down payments often run 20–25%, and reserve requirements jump from 2 months to 6–12 months of PITI. The rate premium runs 0.25–0.75% above conforming. Investors near the threshold sometimes use a piggyback structure: a first mortgage at the conforming limit paired with a second loan covering the overage. The blended cost often beats a single jumbo, especially when the overage is under $150,000.
Real-World Example
Brian is under contract on a three-unit property in suburban Denver for $1,289,000. He's putting 25% down — a $966,750 mortgage. Denver is a high-cost county, so the 3-unit conforming limit applies: $1,872,225. His loan clears that ceiling with $905,475 to spare. His lender locks a rate of 6.87%.
Next, Brian looks at a single-family in Boulder listed at $1,100,000. With 20% down the mortgage is $880,000 — $73,500 above Boulder's single-family conforming ceiling of $806,500. His lender quotes a jumbo rate of 7.44%, a full 0.57% higher. On a 30-year loan, that rate difference costs Brian an extra $51,400 in total interest. He runs the piggyback scenario: a conforming first at $806,500 plus a second at $73,500. The second carries a higher rate, but the blended cost on both loans comes to roughly 7.11% — saving him $27,000 over the life of the loan compared to one jumbo. Brian goes with the piggyback.
Pros & Cons
- Competitive rates: Conforming loans price below jumbo — often 0.25–0.75% lower — because Fannie and Freddie's secondary market guarantee reduces lender risk
- Standardized underwriting: Agency guidelines are consistent across lenders, making it easier to shop rates and compare true costs
- Lower down payment minimums: As low as 15% for investment properties on some conforming programs, versus 20-25% for most jumbo products
- Multi-unit access: The four-tier limit structure keeps most small multifamily (2-4 units) in conforming range, even in mid-to-high cost markets
- Annual resets: Limits increase each November as home prices rise, occasionally converting prior-year jumbo borrowers into refinance candidates at conforming rates
- Dollar-one penalty: Exceed the limit by any amount and the entire loan becomes non-conforming — there's no partial conforming treatment
- Geographic disparity: Investors in baseline-market states face lower ceilings than coastal peers, which can disadvantage deal structures in appreciating secondary markets that haven't yet earned high-cost designation
- Q4 uncertainty: The exact November announcement affects deal modeling for purchases closing late in any given year, before the new limits are confirmed
- PMI exposure below 20%: Conforming loans under 20% down require PMI, which can offset the rate advantage relative to some jumbo products that waive PMI in exchange for a slightly higher rate
- County designation lag: FHFA high-cost designations can trail actual appreciation by 12–18 months, stranding some markets at baseline limits after prices move up
Watch Out
- Check the county-specific limit: The $806,500 baseline applies to most counties, but 100+ have higher limits. Two neighboring counties can have different ceilings — verify yours on the FHFA website before finalizing a purchase price.
- Unit count resets the limit: The 4-unit limit is 92.5% higher than the 1-unit limit in the same county. Size your loan against the correct tier — a borrower treating a duplex purchase as a single-family deal leaves significant financing room on the table.
- Rates move before the announcement: Lenders begin pricing the new year's conforming limits well before November. If you're in contract in October–November, confirm which year's limit your lender is using.
- Piggybacks require their own underwriting: A second mortgage covering the overage carries its own credit review, rate, and fees. Model both scenarios — piggyback vs. single jumbo — before assuming the split is cheaper.
Ask an Investor
The Takeaway
The conforming loan limit is the fence between affordable agency financing and more expensive jumbo territory. In 2025, that fence sits at $806,500 for single-family in baseline markets and scales to $1,551,250 for a fourplex — meaningful room for small multifamily investors. Knowing which tier applies for your unit count and county is a basic step in structuring any acquisition that relies on conventional financing.