You find a sale in your building. The floor plan looks like yours, and the closing price is right there online. It seems like the obvious answer to what your condo is worth. But a matching plan and a short distance do not settle the comparison.
A same-building sale is often a sensible place to start a condo appraisal. It shares a building and location with your unit, and buyers may have considered both. The question is not whether that sale counts. It is how much it tells us about your condo, on the date the appraisal addresses, compared with other available evidence.
Same Building, Different Unit
Consider two high-rise units with similar plans. One looks toward an open view; the other faces a neighboring building. Their floors, orientation and position in the building change what a buyer sees from the windows and balcony. Sharing an address does not make the two units interchangeable, though the view difference alone tells us nothing about its dollar effect.
The comparison does not end at the window. If the sale has an updated kitchen and baths while your unit remains in older condition, the identical plan hides a difference a buyer can see. A unit near a busy entrance or street may offer a different experience from one on a quieter side. Parking spaces, storage rights and usable outdoor space may differ even within one association. These details are worth checking, not assuming from an online listing or a shared floor-plan label.
The advantage of a same-building sale is that location and common facilities may be easier to hold constant. It does not erase differences in the units themselves. Nor does every difference require a price change: an appraiser looks for market evidence rather than assigning a fixed amount to a floor, a view or a renovation.
Why The Next Building May Be a Closer Match
Now imagine your condo is a renovated upper-floor unit with an open outlook. The recent sale down the hall has an older interior and a blocked view. A unit in another nearby project has a similar outlook, condition and floor position. The hall sale deserves examination because of its shared building, but the other sale might help answer a different, useful question: what have buyers paid for a property more like yours?
There is a catch. Two projects that look alike from the street may not offer the same ownership experience. One could have a pool and workout area; the other, meeting space or concierge service. An appraiser would need to examine building condition, parking and storage arrangements, association fees, maintenance and relevant restrictions alongside the units. An amenity list alone cannot establish that one project is superior. Higher fees are not automatically a discount, and extra facilities do not automatically command a premium. What matters is whether buyers in the relevant market appear to respond to the differences and whether the available sales can support that reading.
That is why distance is a poor shortcut. A sale in another building is not better because it is farther away; it can be useful if the unit and project compete for the same kinds of buyers as yours. Conversely, an apparently similar unit in a project with very different facilities or ownership costs may be a weaker substitute despite being across the street. In a Phoenix-area condo appraisal, the practical question is: which sales represent realistic alternatives for a buyer considering this unit? Asking it requires looking at both the individual condo and the project, not just the map.
Timing Can Change How Useful a Sale Is
The date of sale matters, too. Suppose the same-plan unit in your building closed substantially earlier than another plausible sale. If market conditions changed between that closing and the appraisal's effective date, the older price cannot simply be treated as today's answer. A newer transaction is not automatically better if condition, view or project appeal differ sharply.
The appraiser has to consider when each sale occurred, what actually sold and whether the market changed between the sale date and the appraisal date. Sometimes the same-building sale remains highly informative; sometimes it is most useful alongside more recent evidence from elsewhere. The point is to explain the choice, not to discard an older sale just because a newer one exists or to manufacture a time adjustment without support.
What Should You Tell The Appraiser?
If you have been watching a sale in your building, bring the address or listing and say why it strikes you as comparable. Then describe what you know firsthand about your unit: its floor and outlook, interior condition and documented improvements, parking and storage arrangements, and any balcony or patio differences. If there is an unusual location within the building, a nearby source of noise or a change to a common area you think matters, mention it. Association information you have, including fees, amenities or relevant rules, can help frame questions about the project. You can also point out a sale in another building that seems closer in condition or overall living experience.
You do not need to select the final comparable sales or prove a dollar effect. In particular, an asking price or an online closing-price display does not tell the whole story about condition, rights attached to the unit or the sale's relevance at the appraisal date. Your observations give the appraiser leads to examine; the appraisal judgment and support for the value opinion are the appraiser's responsibility. Explain why you need the appraisal as well, so the assignment and relevant date can be discussed before the sales are assessed.
A comparable condo sale is not a verdict just because you can see it from your window. The useful question is how that sale relates to the unit, building, buyers and timing at issue. Todd Crimmins is an Arizona Certified Residential Real Estate Appraiser who appraises condominiums. For owners seeking a condo appraisal in Maricopa County and Northern Pinal County, TDC Valuations can discuss the property and the appraisal purpose. If a nearby sale is on your mind, raise it when you get in touch. It is a useful starting point for a conversation, not a conclusion you have to defend.