How Appraisers Pick Comps in the East Valley: A Q&A

Key takeaways: Appraisers choose comps (comparable sales) by looking for recently closed homes that are as similar as possible in location, size, age, condition, and features. Then they adjust for the differences that remain. Understanding how appraisers pick comps in the East Valley helps sellers see why some nearby sales matter a lot and others barely count.

Welcome to Appraiser's Eye, our Sunday series where I answer common questions about how valuation works. I have been a Certified Residential Appraiser in Arizona for more than 27 years, and I'm also a REALTOR® with Loyalty Home Group at Real Broker in Gilbert. This series is educational only. It is not an appraisal, and it is not an offer to provide appraisal services. The goal is to show you how the process works so you can think more clearly about pricing.

What is a comp, and why do appraisers use them?

A comp is a recently sold property similar to the one being evaluated. Appraisers use comps because actual closed sales show what buyers and sellers really agreed on in the market, which is stronger evidence than asking prices, online estimates, or what a neighbor says their house is "probably" worth.

This approach is called the sales comparison approach, and for most single-family homes it carries the most weight. The logic is simple: a buyer will not pay more for a home than they would pay for an equally desirable alternative. So the appraiser looks at what the alternatives actually sold for.

How do appraisers pick comps in the East Valley?

Appraisers start with closed sales in the same neighborhood or subdivision, then widen the search only as needed. They prioritize sales that are recent, close by, and similar in size, age, style, lot, and condition. The best comps need the fewest and smallest adjustments.

In practice, the screening usually looks at these factors:

• Location: Same subdivision first, then nearby ones. A street on one side of a major road can behave differently than the other side.
• Date of sale: Recent closings carry the most weight. Older sales may be used when the market is thin, but they need more care.
• Size: Living area, bedroom and bathroom count, and overall layout.
• Age and quality: Year built, construction quality, and updates.
• Lot and site: Lot size, pool, RV parking, views, and what backs the property.
• Condition: Original, maintained, or fully renovated.
• Sale type: Typical arm's-length sales are preferred over unusual transactions.

Most appraisers aim for three or more closed comps, and often add listings or pending sales as supporting evidence of where the market is heading. Specific lender or loan-program requirements can vary, so ask the lender about theirs.

How close does a comp have to be?

There is no single magic distance. In a dense Gilbert or Chandler subdivision with frequent sales, appraisers can usually find comps within a short distance. In rural or sparse areas, such as parts of Pinal County, the search may stretch much farther to find enough sales.

Proximity matters because the same neighborhood shares school boundaries, HOA rules, builder styles, and general desirability. But closeness is not everything. A home a quarter mile away that differs in age, size, and condition may be a weaker comp than one a couple of miles away that matches closely. Appraisers weigh the whole picture, and a good report explains why a farther comp was chosen.

How recent do comps need to be?

Appraisers prefer the most recent closed sales, and the ideal comp sold fairly recently. Many lenders look for sales within about six months, but that is a guideline rather than a rule, and it can be exceeded when the market is slow or the property is unusual.

Timing matters because markets move. A sale from a year ago may reflect a different rate environment, different inventory, and different buyer demand. When an appraiser must use an older sale, they typically adjust for market conditions or give it less weight. For current mortgage rate context, check Freddie Mac's Primary Mortgage Market Survey: [VERIFY: current 30-year fixed rate from Freddie Mac's Primary Mortgage Market Survey at freddiemac.com/pmms].

What are adjustments, and how do they work?

Adjustments are the dollar amounts an appraiser adds or subtracts from a comp's sale price to account for differences from the subject home. If the comp has something the subject lacks, the comp is adjusted down. If the subject has something the comp lacks, the comp is adjusted up.

Here is a simplified example, with made-up numbers for illustration only:

Feature	Subject Home	Comp	Direction of Adjustment
Pool	No	Yes	Adjust comp down
Garage	3-car	2-car	Adjust comp up
Condition	Updated	Original	Adjust comp up

The amounts come from market evidence, such as paired sales and local data, not from a rule of thumb. A pool may be worth one amount in one submarket and a different amount in another. [VERIFY: current local adjustment ranges are not provided here, so none are given.] The cleaner the comp, the smaller and fewer the adjustments, and the more reliable the result.

Why might an appraiser skip a comp that looks similar?

An appraiser may skip a comp that looks similar because details beneath the surface differ. Common reasons include a distressed or non-typical sale, a major difference in condition, a very different lot or location factor, or a sale that required unusual terms or concessions.

For example, two homes in Queen Creek may share a floor plan, but one backs to open space and the other sits near a busy road. Or a Mesa home might have sold quickly between relatives, which may not reflect open-market behavior. A home that looks like a match in a listing photo can fall apart under a closer look at the data.

How does the East Valley's geography affect comp choice?

East Valley submarkets can differ sharply from one another, even when they are only a few miles apart. Appraisers factor in things like proximity to Loop 202, US-60, or I-10, nearby employment centers, airport-area noise near Phoenix-Mesa Gateway Airport, and differences between established and newer master-planned areas.

Cities like Gilbert, Chandler, Mesa, Tempe, and Scottsdale each have distinct pockets with their own pricing patterns. Maricopa County and Pinal County also differ in lot sizes, new-construction activity, and the number of recent sales available. A comp that works in one pocket of San Tan Valley may not apply in Apache Junction, and an appraiser is expected to recognize that.

What does this mean for sellers pricing a home?

Sellers can use this knowledge to price more carefully. If you think like an appraiser, you will look at recently closed homes that closely match yours, not just the highest sale on the street or the number in an online estimate. This is general education, not a statement of what any particular home is worth.

A few practical habits help:

1. Focus on closed sales, not just asking prices.
2. Compare condition honestly, including the age of the roof, HVAC, and finishes.
3. Notice what separates your home from the nearest sales, such as lot, pool, or garage.
4. Consider market timing, since older sales may not reflect today's conditions.

If you want to see how these pieces fit together once your costs are included, try a Seller Net Sheet. And if you're comparing neighborhoods as a buyer, you can start with the Loyalty Home Group Search.

This post is general information only and is not personalized financial, tax, or legal advice.

FAQ

How many comps does an appraiser use?

Most appraisals rely on at least three closed comparable sales, often supported by pending sales or active listings. The exact number depends on the property, the data available, and the lender's requirements.

Can an appraiser use a sale from outside my neighborhood?

Yes. When a neighborhood has few recent sales, appraisers widen the search to similar nearby areas. They typically explain why those comps were selected and adjust for the differences.

Do appraisers use Zillow-style online estimates as comps?

No. Online estimates are computer-generated opinions, not closed sales. Appraisers rely on verified sales data, though they may be aware of what buyers see online.

Do renovations always add dollar-for-dollar value?

No. Appraisers adjust based on what the local market actually pays for a feature, which may be more or less than the cost to install it. Condition and quality of the work also matter.

Is this post an appraisal or an offer to appraise my home?

No. This series is educational only. Jason's appraiser background informs his advice as a REALTOR®, but he does not offer appraisal services through this website.

Questions About Pricing Your East Valley Home?

If you are thinking about selling in Gilbert, Queen Creek, Mesa, Chandler, or anywhere nearby, I'm happy to talk through how comps work and how they apply to your plans. Reach out any time. No pressure, and no pop quiz.

Jason Hubbard, REALTOR® | Loyalty Home Group at Real Broker
Navy veteran, Arizona Certified Residential Appraiser with 27+ years of experience, and real estate investor serving the East Valley.
Phone: 480-588-2281 | Email: jhubbard@loyaltyhomegroup.com