A nearby sale can look persuasive until you inspect the details. A home two streets away may have a different property classification, substantially more living area, or a sale date that no longer reflects the market period relevant to a county assessment. To compare nearby home sale records fairly, the question is not simply, “What sold close to me?” It is, “Which recorded sales are genuinely comparable, and do enough of them point in the same direction?”
For Maricopa County homeowners reviewing a Notice of Valuation, that distinction matters. Public records can provide useful evidence, but only when the comparison follows consistent rules. A handful of hand-picked sales may tell a compelling story. They may also tell an incomplete one.
Why distance alone is not enough
“Nearby” is a starting point, not a standard. Homes within the same ZIP code can sit in different subdivisions, have different construction patterns, or serve different buyer markets. Even homes on adjacent streets can vary in age, lot configuration, community features, or property type.
Subdivision is often a more meaningful boundary than a broad radius. It groups homes that are more likely to share the same local influences: nearby schools, road access, builder patterns, community amenities, and buyer expectations. That does not make every sale in a subdivision comparable. It does make the search less likely to drift into a different market simply because it is physically close.
A disciplined comparison also avoids the temptation to widen the map until enough low sales appear. We could widen the search to find more records. We do not. More data is not better if it comes from homes that are no longer genuinely similar to the one being reviewed.
Compare nearby home sale records using consistent rules
A useful sale comparison starts with the county’s public record for the subject property. That record provides the baseline facts: classification, living area, subdivision, and the assessment being reviewed. From there, each potential sale needs to meet the same evidence rules.
At LevyRight, the comparison method is intentionally narrow. It uses recorded sales from the prior 24 months, looks within the same subdivision, matches property classification, and keeps living area within 15% of the home under review. It also requires at least five comparable sales before producing a supported comparison result.
Those limits are not designed to make a result look more dramatic. They are designed to make it more credible.
Match the property classification
A detached single-family home is not automatically comparable to every residential property nearby. County classifications can distinguish among property types that have different demand patterns and ownership characteristics. A townhouse, condominium, manufactured home, or detached home may be close in square footage while still occupying a different segment of the market.
Matching classification helps keep the comparison focused on homes that buyers and sellers are more likely to view as substitutes. It is not perfect, because public records cannot capture every feature of a property. But it is a clear, repeatable first filter.
Keep living area in a reasonable range
Living area has a substantial effect on sale price. A 1,400-square-foot home and a 2,400-square-foot home may share a subdivision and bedroom count, yet they often serve different household needs and price ranges.
A 15% living-area range is a practical guardrail. For a 2,000-square-foot home, that means looking roughly between 1,700 and 2,300 square feet. The range is broad enough to find relevant sales in many subdivisions but narrow enough to avoid treating a much smaller or larger home as an equivalent.
Square footage is not the only factor that matters. Renovations, lot size, pool presence, views, condition, and unusual upgrades can influence a transaction. Still, living area is one of the most consistently available public-record fields, which makes it a useful and transparent filter.
Use a defined sale window
Old sales can create false confidence. A transaction from several years ago may reflect a market with very different inventory, interest-rate conditions, buyer demand, and neighborhood pricing.
Limiting sales to the prior 24 months balances relevance with sample size. In an active subdivision, recent sales may provide a solid local picture. In a quieter community, there may be too few transactions to meet a meaningful evidence threshold. That is not a failure of the comparison. It is an honest limitation of the available public record.
Require enough comparable sales
One sale can be an outlier. Two or three sales can still be heavily affected by a remodeled home, a distressed transaction, a family sale, or a home with a feature not visible in the basic record.
Requiring at least five comparable sales does not eliminate uncertainty, but it reduces the risk of drawing a conclusion from a thin sample. It also gives homeowners something more useful than a single anecdote: a group of recorded transactions that can be inspected as evidence.
If fewer than five qualifying sales exist, the responsible answer is that there is not enough comparable-sale data to support a conclusion. That honesty is the whole point. A lack of evidence is not evidence that the assessment is right or wrong.
Read the records as evidence, not as a verdict
County property and sale records are valuable because they are public, standardized, and available for homeowners to review. They are not a complete description of every home or every transaction.
For example, a recorded sale price may not explain whether the home had extensive upgrades, deferred maintenance, a premium lot, seller concessions, or unusual timing. Public records may also be updated after a transaction or contain fields that warrant a second look. A sound comparison recognizes those limits rather than pretending the data can answer every question.
That is why an assessment check should show its work. The useful output is not merely a label. It is an understandable explanation of which sales were included, why they qualified, what period they came from, and whether there were enough of them to support the comparison.
What a careful result can and cannot say
A rules-based comparison can classify a county assessment as higher than the comparable-sale evidence, in line with it, lower than it, or unsupported because too few qualifying sales were found. Each outcome has a different meaning.
A higher classification means the assessment sits above the indication from the selected comparable records. An in-line classification means the public-record comparison does not show a meaningful mismatch under the stated rules. A lower classification means the assessment sits below the comparable-sale indication. An unsupported result means the filters did not produce a sufficient sample.
None of these labels is a prediction, a guarantee, or a substitute for reviewing the underlying records. They are evidence-led classifications based on a defined method. The method matters as much as the label because it lets a homeowner judge whether the comparison is fair.
Common mistakes when reviewing sales yourself
The most common mistake is selecting sales after deciding what answer you want. It is easy to notice the lowest-priced homes in a search result and ignore transactions that complicate the picture. A consistent filter protects against that instinct.
Another mistake is relying on listing information rather than recorded sales. Listings show an asking price, not necessarily the final transaction amount. A home can remain listed for months, change price repeatedly, or sell under terms that make the initial listing a poor comparison point.
Homeowners can also overread a price-per-square-foot figure. That calculation can be helpful as a quick check, but it is not a complete valuation method. Smaller homes often carry higher per-square-foot figures, while lot value, condition, and location within a subdivision can materially change the result.
Finally, do not assume that a larger search area creates a stronger answer. If the comparison needs homes from another subdivision, a different classification, or far outside the size range just to reach a desired sample count, the data is becoming less comparable. It is better to say the evidence is limited than to manufacture a conclusion.
A better standard for homeowners
Homeowners deserve an assessment check that does more than flag every address as a possible opportunity. The useful question is whether public records support a concern after the same rules are applied to every property.
That approach also respects privacy and control. A homeowner should be able to review an address without creating an account, giving up contact details, or being routed into a sales conversation. The records are public. The methodology should be plain enough for a homeowner to understand.
When you compare nearby home sale records, look for the discipline behind the result: same subdivision, same classification, similar living area, recent recorded sales, and enough transactions to support a conclusion. If the data does not clear that bar, a careful tool should say so plainly. Public records, not our opinion, are the place to start.
