A Notice of Valuation can make a homeowner ask a straightforward question: does this number reflect what similar homes actually sold for? County valuation versus recent sales is a useful comparison, but only when the sales are genuinely comparable and the county number is understood in context. A higher-looking assessment is not automatically wrong. A lower-looking one is not automatically right. The evidence matters.
For Maricopa County homeowners, the most useful starting point is public records, not a broad estimate or a persuasive sales pitch. That means looking at the county’s property record alongside recorded sales of similar homes in the same local market. It also means being willing to accept an honest result when the available evidence does not support a clear conclusion.
What a County Valuation Represents
A county valuation is not a live listing price, an online estimate, or a promise that your home would sell for that amount this week. It is an assessor’s value determination made for a specific assessment cycle and based on information available under that process.
Arizona property records commonly show two values that homeowners may see together: Full Cash Value and Limited Property Value. Full Cash Value is the figure most closely associated with the assessor’s estimate of market value. Limited Property Value is calculated under a separate statutory framework and may be the value used in determining a tax bill. Because these figures serve different functions, comparing a recent sale price to the wrong field can create confusion from the start.
The timing matters just as much. A sale that happened after the valuation date may be useful context for understanding a neighborhood, but it may not describe the market the county was measuring. Likewise, a home sold years earlier can be real public-record data without being useful evidence of a current local value.
Why Recent Sales Are More Useful Than Broad Estimates
A recorded sale is a completed transaction. It reflects a price that a buyer and seller agreed to, then entered into the public record. That makes recent sales a stronger starting point than an automated estimate built from wider-area trends, especially in neighborhoods where values vary sharply from one subdivision to the next.
But a sale price is not automatically a comparable sale. A larger home, a different property type, a remodeled home, or a home on an unusually large lot may sell for a different reason than the home being evaluated. A nearby sale can be interesting and still be poor evidence.
The question is not, “Can I find a lower sale?” The better question is, “Do several similar homes in this same local market point in the same direction?” One outlier rarely answers that question. A consistent group of closely matched sales may.
A comparable sale needs more than proximity
Distance is easy to understand, but it is not enough on its own. A home across a major road, in a different development, or within a community with different amenities can compete in a different market. In Maricopa County, that can happen within a few blocks.
Property classification also matters. A detached single-family home should not be casually compared with a condominium, townhome, manufactured home, or a property with materially different characteristics. Living area matters for the same reason. A sale involving a home that is much larger or smaller can distort the comparison, even when it is nearby.
A disciplined comparison also looks at the number of available sales. With only one or two possible matches, it is too easy to build a story around unusual transactions. More evidence creates a more stable picture.
County Valuation Versus Recent Sales: A Fair Method
A fair comparison begins by defining rules before looking at the outcome. Otherwise, it becomes tempting to keep changing the search until a preferred answer appears.
LevyRight uses a deliberately narrow, transparent method for residential comparisons in Maricopa County. It matches the property’s classification, keeps living area within 15%, limits recorded sales to the prior 24 months, and requires at least five comparable sales within the homeowner’s subdivision. Those rules do not make every result dramatic. They are designed to make the result credible.
We could widen the search, loosen the size range, or include older transactions to produce more matches. We do not. A larger pool of weak comparisons is not better evidence than a smaller pool of strong ones.
The result can fall into four plain-language categories: the county assessment appears higher than the comparable-sale evidence, in line with it, lower than it, or unsupported because sufficient comparable-sale data is not available. The last category is not a failure. It is a truthful statement about what public records can and cannot establish under a consistent standard.
Why five sales is a meaningful threshold
Five comparable sales are not magic. Markets are messy, and no fixed count eliminates judgment from every valuation question. Still, requiring at least five helps prevent one unusual sale from carrying the entire analysis.
A single low sale could reflect condition, seller urgency, a private arrangement, or facts not obvious in a parcel record. A single high sale could reflect extensive upgrades, a premium lot, or intense buyer competition. When several qualifying sales cluster in a similar range, the comparison becomes less dependent on any one transaction.
That is also why a result should show its work. Homeowners should be able to see the basic criteria behind a conclusion rather than being asked to trust a score, a lead form, or a promise of savings.
Common Reasons the Numbers Do Not Match
A difference between the county value and a recent sale does not always mean either number is defective. Often, the comparison itself needs closer inspection.
First, the properties may not truly match. Finished square footage is a practical filter, but it does not capture every feature that affects a sale. A pool, lot location, renovation quality, garage configuration, views, age, and overall condition can influence what buyers pay.
Second, sale timing may explain the gap. Maricopa County markets can move quickly. If most useful sales occurred early in a 24-month window and market conditions shifted later, the sales may represent a broader period rather than a single moment.
Third, public data has limits. Records can be incomplete, classifications can be imperfect, and a recorded price does not always reveal the condition or circumstances of a transaction. A rules-based method reduces the risk of overreading thin data, but it cannot turn incomplete records into certainty.
Finally, the county’s property description may differ from the home as it exists today. Public records may show a different living area, property type, or other characteristic than the homeowner expects. Before drawing conclusions from any valuation comparison, it is worth confirming that the underlying property facts are reasonably aligned.
What an Honest Result Looks Like
An honest assessment check does not start with the assumption that every homeowner has a problem to solve. It asks whether comparable recorded sales support the county’s value under stated rules.
If the assessment is in line with several recent, local, similarly sized sales, that is useful information. It can save a homeowner from spending time chasing a conclusion the evidence does not support. If the assessment appears higher than the comparable-sale group, that is also useful, but it remains an evidence-based comparison rather than a prediction of any individual outcome.
And when there are not five qualifying sales in the subdivision, the right answer is not to manufacture confidence by reaching farther away or accepting mismatched homes. The right answer is that the available data is insufficient for this method. That honesty is the whole point.
A Better Way to Read Your Notice of Valuation
Start by identifying which county value you are reviewing and the period it represents. Then look beyond the nearest sale or the lowest price you can find. Focus on sales that are recent enough, local enough, similar enough, and numerous enough to provide context.
Keep the comparison grounded in recorded facts. Listing prices show expectations, not completed transactions. Neighborhood headlines show broad trends, not necessarily the market for a specific subdivision. An automated estimate may be convenient, but it often cannot explain why it reached its number.
A careful county valuation versus recent sales review does something simpler and more useful: it shows whether the county’s figure is supported by a consistent set of comparable public records. Sometimes the answer will be yes. Sometimes it will be no. Sometimes the evidence will not be strong enough to say. For a homeowner who wants clarity without a sales funnel, each of those answers has value.
