How Home Appraisals Actually Work

Who Conducts an Appraisal and Why It's Required

When a buyer applies for a mortgage, the lender needs assurance that the property is worth the loan amount. To get that assurance, lenders hire a state-licensed or state-certified appraiser — an independent third party with no financial stake in the transaction. Federal regulations governing most mortgage loans require this independence; the buyer cannot simply choose their own appraiser.

The appraiser's client is the lender, not the buyer or seller. That distinction matters: the report is written to protect the lender's collateral, though buyers are entitled to receive a copy. For transactions without a mortgage — all-cash purchases — an appraisal is optional, though buyers may still commission one independently for peace of mind.

If you want a broader look at how appraisals fit into the full spectrum of valuation tools, see our definitive resource on property valuation.

What an Appraiser Actually Examines

The appraisal process has two main phases: a physical inspection of the property and a market analysis of comparable sales.

The On-Site Inspection

During the site visit, the appraiser documents the home's size (gross living area), layout, age, condition, and features — bedrooms, bathrooms, garage, lot size, and any notable updates or deficiencies. They note the quality of construction, the condition of major systems, and any visible issues that could affect value or marketability.

The Comparable Sales Analysis

After the inspection, the appraiser selects recently sold homes — typically within the past six to twelve months — that are similar in size, age, location, and features. These are called comparables or comps. The appraiser then makes dollar adjustments to account for differences between each comp and the subject property. A comp with an extra bathroom, for example, will be adjusted downward; a comp with less square footage will be adjusted upward. The adjusted sale prices form the basis of the final value opinion.

It's worth understanding how this differs from a Comparative Market Analysis, which real estate agents use. Our article on CMA vs. formal appraisal explains the key differences and when each one applies.

Interpreting the Appraisal Report and What Comes Next

The appraiser delivers a written report — most residential appraisals use a standardized form called the Uniform Residential Appraisal Report (URAR). It includes a property description, a map of comparables, adjustment grids, and the appraiser's final value conclusion.

Three outcomes are common in a purchase transaction:

• Appraisal matches or exceeds the purchase price: The transaction proceeds as planned. The lender is satisfied the collateral supports the loan.
• Appraisal comes in low: The lender will lend only based on the appraised value. Buyers and sellers must then negotiate — price reduction, buyer covers the gap, or both parties walk. A formal Reconsideration of Value can be submitted if the buyer believes comparables were overlooked.
• Appraisal flags property condition issues: Lenders for government-backed loans (FHA, VA) have minimum property standards. If the appraiser notes required repairs, those may need to be completed before closing.

It's also useful to understand how appraised value relates to other figures attached to a home. Our explainer on assessed, appraised, and market value clarifies what each number means and when it applies to your situation.

For buyers navigating the full purchase process, our home buying hub provides step-by-step context for where the appraisal fits within your transaction timeline.