Freddie Mac Guidelines: Property Value for LTV Ratios

How Fannie Mae Determines Property Value for Your Loan

The loan-to-value ratio drives almost every aspect of your mortgage approval. It determines your interest rate, whether you need mortgage insurance, and sometimes whether you qualify at all. Fannie Mae has specific rules about which property value to use in this calculation.

The value isn't always straightforward. It depends entirely on what you're trying to accomplish with your mortgage.

Purchase Transactions with Improvements

When you're buying a home and financing improvements as part of the purchase, Fannie Mae uses the lower of two numbers: the "as completed" appraised value or your total acquisition cost.

Your total acquisition cost includes the purchase price plus the cost of eligible improvements. Say you're buying a house for $300,000 and planning $50,000 in renovations. Your total acquisition cost is $350,000. If the appraiser says the completed value will be $380,000, Fannie Mae uses $350,000 for your loan-to-value calculation.

But if the appraiser says the completed value will be only $340,000, then $340,000 becomes your value for loan-to-value purposes. Fannie Mae always takes the more conservative number.

You must document every cost that goes into your total acquisition cost calculation. This means contractor bids, material estimates, and permit fees. Your lender needs a paper trail for the entire $50,000 improvement budget.

Refinances to Finance Improvements

If you're refinancing your existing mortgage to pull cash out for home improvements, the rules change. Here, Fannie Mae uses the "as completed" appraised value of your property.

The appraiser visits your home and evaluates what it will be worth after you complete the planned improvements. They don't consider what you paid for the house originally or what your current mortgage balance might be.

This approach can work in your favor if your home has appreciated significantly since you bought it. The appraiser might determine your home will be worth $400,000 after improvements, even though you only paid $280,000 three years ago.

Standard Refinances Without Improvements

For regular refinances where you're just paying off your existing mortgage debt, Fannie Mae uses the current appraised value of your property as it sits today.

No "as completed" calculations. No consideration of future improvements. The appraiser evaluates your home in its current condition and that becomes your value for loan-to-value purposes.

This is the most straightforward scenario. You want to refinance your $250,000 mortgage balance, your home appraises for $350,000, and your loan-to-value ratio is roughly 71%.

Required Documentation for Value Determination

Your mortgage file must contain specific documentation depending on which value calculation applies to your situation.

For purchase transactions using total acquisition cost, you need detailed cost breakdowns for every improvement. This includes signed contractor agreements, material receipts, and permit documentation. Your lender won't accept rough estimates or verbal quotes.

For refinances involving improvements, the appraiser needs detailed plans and specifications for the work you're planning. They can't appraise the "as completed" value without knowing exactly what you intend to do.

Standard refinances require only the standard appraisal documentation, but make sure the appraiser has access to your property and can evaluate all areas that affect value.

Why Fannie Mae Uses Conservative Value Calculations

These rules exist because property values can be unpredictable, especially when improvements are involved. By using the lower of appraised value or total cost, Fannie Mae protects itself and the mortgage market from overvalued properties.

Construction projects often run over budget or don't add as much value as homeowners expect. A $50,000 kitchen renovation might only add $30,000 to your home's market value. Fannie Mae's approach accounts for this reality.

The "as completed" appraisal method also introduces uncertainty. Appraisers must estimate future value based on planned work that hasn't happened yet. Market conditions could change between the appraisal and project completion.

Underwriting Requirements Beyond Value

Your loan must either receive an "Accept" recommendation from automated underwriting or qualify under manual underwriting standards. The value determination is just one piece of your overall approval.

Automated underwriting systems like Desktop Underwriter evaluate your entire loan profile, including the property value, your income, credit score, and debt levels. An "Accept" recommendation means the system believes your loan meets Fannie Mae's risk standards.

Manual underwriting involves human review of your application when automated systems can't reach a clear decision. This process requires additional documentation and stricter qualifying ratios.

Common Complications with Value Determination

Improvement cost overruns create problems when you're using total acquisition cost for value. If your $50,000 renovation budget grows to $65,000, but your loan was based on the original $50,000 figure, you'll need additional financing for the extra costs.

Appraisal disputes can derail your timeline, especially with "as completed" valuations. If you disagree with the appraiser's assessment of your planned improvements' value, you might need a second appraisal or revised improvement plans.

Market timing affects refinances significantly. If property values in your area decline between your loan application and closing, your loan-to-value ratio could exceed acceptable limits even if nothing else changes.

Properties in declining markets face additional scrutiny. Even if your home's current appraised value supports your desired loan amount, underwriters might question whether that value will hold through the loan term.

References

For the official guidelines, see 4606.2: Determination of value for the loan-to-value (LTV)/total loan-to-value (TLTV)/Home Equity Line of Credit (HELOC) TLTV (HTLTV) ratio, underwriting requirements and qualifying ratios in the Fannie Mae Selling Guide.