How to Read a Home Appraisal (And What to Do If It Comes In Low)

A home appraisal is required by virtually every lender before funding a purchase or refinance mortgage. Most buyers receive a copy and don't know what to do with it. Here's how to read one, what the numbers actually mean, and what your options are if the appraisal comes in below the contract price.

What an Appraisal Is (and Isn't)

A licensed appraiser's job is to estimate the market value of a property — the price it would most likely sell for between a willing buyer and a willing seller in an arm's-length transaction. This is an independent professional opinion backed by data, not an assessment of what you're willing to pay.

Appraisals are not:

• Home inspections (they don't assess condition or safety in detail)
• Guarantees of market value
• The final word on what a home is worth (appraisers make mistakes)

Lenders require appraisals because they're using the home as collateral — they need confidence that the security behind the loan is worth at least what they're lending.

Key Sections of a Standard Appraisal (Form 1004)

Subject Property Information: The address, legal description, lot size, year built, gross living area (GLA), and current contract price. The appraiser confirms these facts.

Neighborhood Analysis: The appraiser's assessment of the neighborhood — property values (increasing, stable, declining), marketing time (demand), and whether the subject property is typical for the area.

Site: Lot size, zoning, utilities, and any site conditions affecting value.

Improvements: Description of the house itself — construction quality, room count, square footage, condition rating, and notable features or deficiencies.

Sales Comparison Approach (most important section): The appraiser selects 3+ "comparable sales" (comps) — recently sold properties with similar characteristics — and adjusts the sale prices of those comps up or down to account for differences from the subject property. This is where the final value estimate comes from.

Reconciliation: The appraiser's final opinion of value and how they weighted the different approaches.

How to Read the Comparable Sales Grid

This is the most important part of the report and the one most often misunderstood.

Each comp column shows the sold price of a comparable home, then a series of adjustments. Adjustments work like this: if the comp has a feature the subject doesn't, the comp's price is adjusted down (because you'd pay less for a home without that feature). If the subject has a feature the comp doesn't, the comp's price is adjusted up.

Example: The comp sold for $425,000 and has 3 bedrooms. Your subject has 4 bedrooms. The appraiser adds +$15,000 to the comp's price, because the comp would have sold for more with a 4th bedroom. Adjusted comp value: $440,000.

After all adjustments, each comp produces an "adjusted sale price" — the price that comp would have sold for if it were the subject property. The appraiser then reconciles these adjusted values to arrive at the final opinion of value.

What to look at:

• Are the comps truly comparable? Same neighborhood, similar size and age?
• Are the sales recent? Within 6 months is ideal; the appraiser may have to go 12 months in thin markets
• Are the adjustment amounts reasonable? Very large adjustments (±10–15% of sale price) on multiple comps can indicate weak comparable data
• Is the gross living area accurate? GLA (square footage) is one of the biggest value drivers, and errors in measured square footage do occur

When an Appraisal Comes In Low

A "low appraisal" means the appraiser's opinion of value is less than the contract price. This creates a problem: the lender will only lend based on the lower of the purchase price or appraised value. If the home is under contract for $450,000 but appraises at $425,000, the lender bases their loan on $425,000.

With a typical 20% down payment, the buyer expected to bring $90,000 to closing (20% of $450,000). Now they need to bring $90,000 + $25,000 appraisal gap = $115,000. Or they need to renegotiate.

Your options when the appraisal is low:

1. Renegotiate the purchase price. Ask the seller to reduce the price to the appraised value. In a buyer's market, this is often successful. In a competitive market, sellers may decline — they know another buyer might pay cash or bring an appraisal gap guarantee.

2. Dispute the appraisal (reconsideration of value / ROV). If you believe the appraiser used poor comps, missed relevant sales, or made factual errors (wrong square footage, missed an upgrade), you can submit a formal ROV to the lender with supporting data. The lender sends this to the appraiser. ROVs are not reliably successful — appraisers are independent and don't simply revise upward on request — but they're worth pursuing if you have genuine supporting data.

3. Order a second appraisal. In some circumstances, particularly if the first appraisal appears clearly flawed, you can request a new appraisal. Not always permitted by the lender; depends on the loan type and lender policy.

4. Cover the gap yourself. Pay the difference between appraised value and contract price out of pocket ("appraisal gap coverage"). This is increasingly common in competitive markets and was near-universal during the 2021–2022 frenzy. Only viable if you have the cash and the property is worth it to you at the contract price.

5. Walk away. Most purchase contracts have an appraisal contingency allowing the buyer to exit the contract without penalty if the property doesn't appraise. Know whether your contract has this contingency before you enter one.

Appraisals for Renovation Financing

If you're using a HELOC, home equity loan, or cash-out refinance, the lender will require an appraisal to confirm the home's current market value and determine how much equity you can access.

For renovation loans (like FHA 203k or Fannie Mae HomeStyle), the appraisal is done on the "as-improved" value — the estimated value of the home after the planned renovation is complete. This allows you to borrow against future value. The appraiser reviews the renovation scope and plans to estimate the post-project value.

After completing a major renovation — especially one that adds square footage or significantly updates a kitchen or bathrooms — requesting a new appraisal can reveal substantial equity gains. This is the refinance step in the BRRRR strategy.

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Related reading: HELOC vs. Home Equity Loan vs. Cash-Out Refi · BRRRR Strategy Guide · How to Calculate Cap Rate