After nine years working as a transaction coordinator, I’ve read thousands of pages of agent Comparative Market Analyses (CMAs). I’ve seen agents walk into listing presentations with a pre-printed packet they pulled five minutes before arrival, and I’ve seen seasoned pros bring a detailed breakdown of adjustments that actually holds up under an appraiser’s scrutiny.
The biggest issue I see in the current market? The obsession with the “magic number.” Sellers want one number, and agents are often all too happy to provide it to secure the listing. But as someone who has spent years watching deals fall apart in the underwriting phase, I have one question for anyone presenting a valuation to you: What would make this number wrong?
If your agent can’t answer that, or if they haven’t walked your home to see the “functional obsolescence” hidden in the layout, you aren’t getting a valuation; you’re getting a sales pitch. Let’s talk about the hard data, the timeline of sold comps 90 days versus sold comps 180 days, and why you need to stop trusting the automated algorithm.
What is a CMA, Really?
A Comparative Market Analysis (CMA) is not a formal appraisal. It is a snapshot in time. Its purpose is to estimate the probable sales price of a property based on what similar homes have recently traded for in the same market.
However, the value of a CMA is only as good as the human judgment behind it. An effective CMA accounts for:
- Gross Living Area (GLA): Comparing a 1,200 sq. ft. ranch to a 2,000 sq. ft. colonial is a rookie mistake.
- Condition Adjustments: Did the comp have a recent kitchen renovation? Does your home have the original 1970s avocado-green appliances?
- Location Nuance: In the Capital Region, being three blocks away can mean the difference between a high-demand school district and one that’s struggling.
CMA vs. Zestimate: The Algorithmic Trap
I hear it constantly: “But Zillow says my house is worth $450,000.”
Online estimates—or Zestimates—are automated valuation models (AVMs). They are fed data from public tax records and MLS inputs. They do not know that your neighbor’s home had a severe foundation crack, or that your home has a custom-built, luxury sunroom that adds significant value. They are “data-dumb.”
A human-generated CMA is designed to filter out the noise. When I look at recent comparable sales, I’m looking for the “why” behind the price. Did that house sell quickly because it was underpriced, or because it was in pristine condition? An algorithm sees the price, but it can’t interpret the psychology of the local buyer pool.
How Recent Should Comps Be? The 90 to 180 Day Window
The timing of your comps is the most critical variable in the equation. If the market is moving, data from a year ago is essentially useless. So, what is the sweet spot?
The Case for Sold Comps 90 Days
In a hyper-active market, sold comps 90 days out are the gold standard. They represent the current state of interest rates, buyer sentiment, and supply. If you are pricing your home in Albany or the surrounding suburbs during the spring rush, I don’t want to see anything older than three months. The market has likely shifted by 2-3% in that timeframe alone.
The Case for Sold Comps 180 Days
If you are in a neighborhood with low turnover—maybe a quiet street where only one or two homes sell per quarter—you simply won’t have enough data within a 90-day window. This is where sold comps 180 days come into play. When we extend the window to 180 days, we accept that we may need to make “time adjustments” to account for market movement between six months ago and today.
The Selection Hierarchy
CMA vs. Appraisal: Is it Worth the Investment?
A CMA is a marketing tool for a listing agent. A professional appraisal is a neutral, legal document. If you are worried about your pricing, you might consider hiring an appraiser directly. It will cost you $400–$600, but it removes the “agent-bias” of wanting to tell you what you want to hear.
What Would Make This Number Wrong?
I ask this because I want to protect your equity. If your agent gives you a value, demand they answer this question. A valuation is “wrong” if:
- It ignores “Days on Market” (DOM): If a house sold for $400k but took 180 days to do it, that isn’t a comp for your home that you hope to sell in 10 days.
- It ignores Pending Sales: The “current” market isn’t just what *has* sold; it’s what is currently under contract. If you don’t look at the active/pending list, you’re looking in the rearview mirror.
- It ignores “Expired” Listings: If homes similar to yours have been sitting on the market for 90 days at your proposed price and haven’t sold, you are likely overpriced.
Final Thoughts for the Seller
Stop looking for one number. Start looking for a range. If your agent is confident in a single, fixed price, they are likely ignoring the volatility of the local market. A good CMA provides a “low-end” (the quick sale price), a “likely-end” (the market value), and a “high-end” (the fangchanxiu reach price if the conditions are perfect).
When you sit down with an agent, ask them to show you their comps. If they can’t explain *why* they chose a specific sale from 120 days ago over a closer sale from 60 days ago, you’re talking to a salesperson, not an advisor.
In the Albany market, where winter weather and school year cycles dictate traffic, the recent comparable sales are your best defense against an appraisal gap later in the deal. Keep the window tight when you can, expand it only when you must, and always, always ask: What would make this number wrong?
Summary Checklist for Your Next Meeting:
- Does the CMA include homes that are currently “Under Contract” or “Pending”?
- Were the comps selected based on physical similarity (GLA/Beds/Baths) or just proximity?
- Did the agent physically walk through your home before selecting the comps?
- Is the data limited to a 90-180 day window, or are they using year-old “outliers”?