What People Get Wrong About Appraised Value vs Market Value vs Assessed Value

Appraised value is one licensed appraiser's supported opinion of value on a specific date, produced for a lender. Market value is what a willing buyer would actually pay a willing seller today. Assessed value is a county figure calculated for property tax purposes, on the county's own schedule and formula.

The mistake is assuming they should converge. They are built from different inputs, updated on different clocks, and serve parties with different interests. An appraisal exists to protect a lender's collateral position. An assessment exists to allocate a tax burden. Market value exists only in the moment a transaction happens.

When two of them disagree, that is usually not an error. It is just three instruments measuring three things.

Assessed value is the figure homeowners most often quote and the one that carries the least weight in a lending decision. Counties reassess on a cycle, sometimes lagging the market by a year or more, and many jurisdictions apply ratios, caps, or exemptions that deliberately hold the assessed figure below what a property would sell for.

In Arizona, the tax valuation process has its own timing and its own limits on year-over-year movement. That means your assessment can sit well below current market conditions in a rising market, or above it in a falling one, without anything being wrong.

If you are estimating how much equity you can access, the assessment is a rough sanity check at best. It is not the number an underwriter will use.

An appraiser is not pulling a number out of the air, and they are also not simply reporting what the market says. They select comparable sales, adjust them for differences in size, condition, lot, age, and location, and reconcile those adjusted figures into a supported conclusion.

That process explains most of the surprises. A comparable that closed months ago in a fast-moving market carries stale information. A finished basement or a casita may adjust for far less than it cost to build. Renovations you value highly may be treated as ordinary condition, not as added square footage or amenity.

Appraised value also has an effective date. It is a statement about one day, supported by data available on that day, not a permanent verdict on the property.

Automated valuation models on real estate sites are statistical estimates built from public records, tax data, and recent sales. They are genuinely useful for orientation and directionally reasonable in dense, homogeneous neighborhoods with steady turnover.

They get weaker exactly where many equity-positioned homeowners live: larger lots, custom builds, significant renovations, or areas with few recent comparable sales. The model has no way to know your kitchen was rebuilt or that the lot backs to a wash rather than a road.

Some lenders will accept an automated valuation in place of a full appraisal on certain files, which is a decision driven by loan characteristics rather than by which number the borrower prefers. It is a reasonable thing to ask about early rather than assume.

Lending decisions run on the appraised value, or on an accepted alternative valuation, not on the county assessment and not on an online estimate. Your available equity is calculated against that figure, so a gap between what you expected and what the appraisal supports changes the math directly.

The practical move is to look at recent closed sales near you, similar in size and condition, before you form an expectation. Closed sales, not active listings, since asking prices reflect hope and closed prices reflect agreement.

If the appraised value comes in lower than the supporting data suggests it should, there is usually a defined process for submitting additional comparable sales for reconsideration. Knowing that path exists before you need it takes a lot of the anxiety out of the appraisal date.