During a home appraisal, the appraiser measures your home’s finished living space, rates its condition and construction quality, documents the lot and any legal restrictions on it, and compares the property against recent sales of similar nearby homes to produce an independent opinion of market value. The work follows the Uniform Standards of Professional Appraisal Practice, which call for a credible, well-supported value conclusion rather than any single formula.1Appraisal Subcommittee. USPAP Compliance and Appraisal Independence What follows is a walk through everything the appraiser actually examines, in roughly the order it ends up on the report.
Measurements and Layout
The inspection starts with a tape measure. The appraiser calculates Gross Living Area (GLA), which is the total finished, above-grade living space measured from the exterior walls. That single number drives the value estimate more than almost anything else, because it represents the usable primary living space buyers compare across homes.
Below-grade space is excluded from GLA even when it is beautifully finished. A finished basement adds value, but the appraiser reports it in a separate section of the form. A 2,000-square-foot home with an unfinished basement and a 1,500-square-foot home with a 500-square-foot finished basement are not treated as equivalent, even though both contain 2,000 square feet of enclosed space.
The appraiser then documents the bedroom and bathroom count, cross-referencing public records to catch discrepancies. Secondary features get noted along with their condition: garages, decks, covered porches, pools, outbuildings. Context matters. A three-car garage in Minnesota contributes more value than the same garage in southern Florida, because the market reaction to the feature varies by location.
One point of confusion worth clearing up early: personal property is excluded from the valuation. Furniture, appliances that are not built in, window treatments, and anything else you could pick up and carry out of the house are not part of the real estate value. The appraiser values the land and the permanent structures attached to it, nothing else.
Condition and Construction Quality Ratings
Every appraisal assigns two standardized ratings to the property: one for condition, one for construction quality. These follow the Uniform Appraisal Dataset definitions used by Fannie Mae and Freddie Mac, so the ratings mean the same thing from one appraiser to the next.
Condition ratings run from C1 to C6:2Fannie Mae. Property Condition and Quality of Construction of the Improvements
- C1: Brand-new construction, never occupied. No physical wear whatsoever.
- C2: No deferred maintenance and virtually no wear. Either nearly new or recently renovated to like-new standards.
- C3: Well maintained with only normal wear. Some components may have been updated, but not necessarily all of them.
- C4: Minor deferred maintenance and normal wear. The home has been adequately maintained and needs only cosmetic or minimal repairs.
- C5: Obvious deferred maintenance requiring significant repairs. The home is still functional as a residence but livability is somewhat reduced.
- C6: Substantial damage or deferred maintenance severe enough to affect safety or structural integrity. Major repairs and rehabilitation are needed.
Most resale homes land in C3 or C4. A C5 or C6 rating can complicate financing, because some loan programs will not approve mortgages on properties needing major repairs. Quality ratings (Q1 through Q6) work the same way, ranging from architect-designed custom homes at Q1 down to basic economy-grade construction at Q6.
The appraiser also estimates the property’s effective age, which can differ from its actual age. A 30-year-old home with a new roof, updated kitchen, and modern mechanical systems might have an effective age closer to 10 years. A 15-year-old home with a failing roof and original everything might rate an effective age of 25. Effective age feeds directly into the depreciation calculation under the cost approach.
The Lot and Legal Factors
The appraiser evaluates the land itself, separately from whatever sits on it. Lot size, shape, topography, and available utilities all factor into the analysis. A steeply sloped lot or an oddly shaped parcel that limits future use gets noted and adjusted against flat, regularly shaped comparables.
Legal encumbrances get scrutinized through public records. Easements, encroachments, and rights-of-way can limit how you use the property. A utility easement running through a backyard, for example, prevents building in that strip. Fannie Mae requires the appraiser to assess how these factors affect both value and marketability.3Fannie Mae. Site Section of the Appraisal Report
Zoning classification is verified to confirm the existing use is legal. A duplex sitting in a single-family zone, for instance, is a non-conforming use that can limit financing options and shrink the buyer pool.
The appraiser must identify the property’s FEMA flood zone designation and record the specific zone, map number, and effective date on the appraisal form. A high-risk flood zone triggers mandatory flood insurance requirements and tends to depress market value. Restrictive covenants and mandatory HOA fees are noted as well, since they represent ongoing financial obligations and use restrictions that affect what buyers will pay.
Comparable Sales
The sales comparison approach carries the most weight in a residential appraisal. The appraiser identifies recently sold properties that closely resemble your home in location, size, construction type, and features. These “comparables” or “comps” should ideally be recent closed sales from the same neighborhood. Older sales, or active and pending listings, serve as supporting evidence when recent closed transactions are scarce, but they do not replace actual sold data.
Once the comps are selected, the appraiser adjusts each one’s sale price to account for differences from your home. Every adjustment is made to the comp, never to the subject. If a comp has a pool and your home does not, the appraiser deducts the pool’s contributory value from the comp’s sale price. If a comp lacks a feature your home has, the appraiser adds that feature’s value to the comp. The goal is to standardize each comp to show what it would have sold for if it were identical to the subject.
Adjustments must be market-based, meaning they reflect what buyers in that specific market actually pay for a given feature, not the cost to build it or an arbitrary rule of thumb. Fannie Mae explicitly states there are no fixed limits on adjustment size. The appraiser must document the data and reasoning behind every dollar adjustment.4Fannie Mae. Adjustments to Comparable Sales
Sales or financing concessions in the comps get separate treatment. If a seller paid the buyer’s closing costs or offered other incentives, the appraiser adjusts for the portion of the sale price that was inflated by those concessions. The adjustment is not a dollar-for-dollar deduction of the concession amount; it is an estimate of how much the concession actually inflated the price.
Broader market conditions get analyzed too: supply and demand, average days on market, and price trends. A market with shrinking inventory and fast-moving sales suggests upward pressure on values. This context helps the appraiser decide whether time adjustments are needed for older comp sales.
Cost and Income Cross-Checks
The cost approach works as a cross-check and is most useful for newer construction. The logic: a rational buyer will not pay more for an existing home than it would cost to build an equivalent one. The appraiser estimates the replacement cost of the structure using current construction data, subtracts depreciation (physical wear, outdated features, and external factors like a noisy highway), then adds the land value. Land is always valued as though vacant, usually by comparing recent sales of similar vacant lots. For an older home, the depreciation deduction can be substantial, which is why this approach tends to be less reliable for resale properties than for recent construction.
The income approach applies when a property generates rental income. For a typical owner-occupied home, it receives little or no weight in the final conclusion.
Extra Items on FHA and VA Appraisals
If the loan is backed by FHA or VA, the appraisal includes a layer of health and safety inspection that conventional appraisals skip. FHA’s Minimum Property Standards require the home to meet three criteria: safe for occupants, secure from the elements, and structurally sound.5U.S. Department of Housing and Urban Development. Minimum Property Standards Resources
In practice, the appraiser checks for functional heating, working electrical systems with no exposed wiring, adequate water supply and hot water, and no obvious hazards. For homes built before 1978, any chipping or peeling paint triggers a lead-based paint concern that must be resolved before closing. Roofs with less than two years of remaining life, missing stair handrails, and foundation cracks are common items that cause FHA appraisals to come back with required repairs. HUD also sets specific durability requirements that go beyond standard building codes, covering items like doors, windows, gutters, and kitchen cabinets, because the property serves as collateral for the government-insured loan.
A conventional appraisal will note the same issues as condition factors, but it will not mandate repairs the way an FHA appraisal does.
How Long the Appraisal Is Good For
Appraisals have expiration dates. For conventional loans sold to Fannie Mae, the appraisal is valid for 12 months from the effective date. If more than 12 months pass before the loan closes, a completely new appraisal is required.6Fannie Mae. Appraisal Age and Use Requirements
FHA loans have a tighter window. The initial appraisal is valid for 180 days from the effective date. An appraisal update can extend that to one year, but the update must be completed before the initial 180-day period expires.7U.S. Department of Housing and Urban Development. FHA INFO 2022-71 – Appraisal Validity Period
If the Appraisal Comes In Low
A low appraisal is one of the most common deal-killers in real estate. When the appraised value falls below the purchase price, the lender will not finance the gap, and you have a few options.
The most direct fix is renegotiating the price. Your agent can present the report to the seller and request a reduction to match the appraised value or meet somewhere in the middle. Sellers who are motivated or facing a soft market often agree to adjust rather than start over with a new buyer who will face the same appraisal.
If the seller will not budge, you can cover the gap out of pocket by increasing your down payment. Some buyers plan for this possibility by including an appraisal gap clause in their purchase agreement, committing them to pay some or all of the difference up to a specified amount. These clauses are common in competitive markets.
You can also formally challenge the appraisal through a reconsideration of value (ROV). Fannie Mae allows one ROV request per appraisal, routed through your lender rather than directly to the appraiser, with specific supporting information such as comparable sales the appraiser may have missed or factual errors in the report. If the appraiser made a minor error, they must correct it. Material deficiencies require the lender to work with the appraiser to resolve them.8Fannie Mae. Reconsideration of Value (ROV) An ROV is not a guarantee of a higher number, but legitimate errors and overlooked comps do get corrected.
Finally, if your purchase agreement includes an appraisal contingency, you can walk away from the deal and recover your earnest money deposit. Waiving this contingency to make a stronger offer is tempting in competitive markets, but it means absorbing the full risk of a low appraisal.
Getting a Copy of the Report
You have a right to see the finished appraisal. Under Regulation B of the Equal Credit Opportunity Act, your lender must provide you with a copy of every appraisal and written valuation developed in connection with your mortgage application. Delivery must be prompt after completion, and no later than three business days before closing.9Consumer Financial Protection Bureau. Regulation 1002 – Section 14 The lender cannot charge you for providing the copy itself, though you are still responsible for the underlying appraisal fee.
Review the report carefully when you receive it. Check the comparable sales for accuracy, verify that the bedroom and bathroom counts match reality, and confirm that any recent renovations were noted. Errors happen, and catching them early gives you time to request a correction before the mistake affects your loan approval.