Appraisal

The appraisal process begins when a lender orders an appraisal through an Appraisal Management Company (AMC), a requirement under the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. AMCs act as intermediaries that assign appraisers on a rotating basis, preventing loan officers from selecting appraisers who might inflate values to push deals through. This independence requirement, known as the Home Valuation Code of Conduct (HVCC), was established to eliminate appraisal pressure and conflicts of interest that contributed to the 2008 housing crisis.

The appraiser performs a physical inspection of the property, measuring square footage, counting rooms, assessing the condition of major systems (roof, HVAC, plumbing, electrical), and evaluating the overall quality of construction and finishes. Exterior factors such as lot size, location, neighborhood trends, and proximity to amenities like schools, parks, and transit also influence value. The appraiser then researches at least three recent comparable sales (comps) — properties similar in size, age, condition, and location that sold within the past six months. Adjustments are made for differences between the subject property and each comparable: a swimming pool adds value, a smaller lot reduces it, an updated kitchen adds value, deferred maintenance reduces it.

Three primary approaches are used to determine value. The Sales Comparison Approach, most common for residential properties, derives value from recent sales of comparable properties. The Cost Approach calculates what it would cost to rebuild the property from scratch minus depreciation, plus land value. The Income Approach, used primarily for investment properties, estimates value based on the net operating income the property generates relative to market capitalization rates. The final appraised value typically emphasizes the sales comparison approach for single-family homes. The appraiser compiles findings into a standardized report using the Uniform Residential Appraisal Report (URAR or Fannie Mae Form 1004), which includes annotated photos, a street map, and detailed reconciliation of comparable sales.

The appraisal is one of the most consequential steps in the mortgage process because it directly determines how much a lender will finance. If the appraisal comes in below the purchase price — known as an appraisal gap — the borrower faces a sudden funding shortfall. In a competitive housing market where 25% to 40% of appraisals reportedly fall short of contract prices, according to Fannie Mae data, buyers increasingly include appraisal gap coverage in their offers to remain competitive. This clause commits the buyer to cover a defined shortfall, sometimes up to $10,000 or more, without renegotiating.

An appraisal also indirectly affects your interest rate. A low appraisal increases the loan-to-value ratio because the loan amount remains fixed while the value drops. For conventional loans, an LTV above 80% triggers the need for Private Mortgage Insurance (PMI), which adds $100 to $300 per month to the payment. For FHA loans, a low appraisal could reduce the maximum loan amount below what the borrower needs. Borrowers do have recourse options: they can request a reconsideration of value from the lender by providing additional comparable sales the appraiser may have missed, or they can order a second appraisal (at their own expense, typically $500 to $700). However, challenging an appraisal requires substantial supporting evidence and is rarely successful without legitimate errors.