Selling in Sarasota · Guide
Online Home-Value Estimates vs. a CMA
Why a computer estimate and a professional valuation can disagree — and what to use for what.
By Carolin Bohn, REALTOR® | Exit King Realty
Last updated: August 2026
A dash number on a screen is a starting point, not a price
When you look your home up online, an automated estimate appears within seconds. It is convenient — and it is only the opening gambit for understanding what your home is actually worth. A Comparative Market Analysis, or CMA, prepared by a local agent looks at far more than an algorithm does. This guide explains what each is, why they differ, and when to use which.
For how the value of your home connects to selling it well, see the home valuation page, and how Carolin prices homes to sell in the selling your home section.
The two ways to value a home
What an online estimate is
An automated valuation model estimates value statistically, from public records, county data, and sales it can identify. It is useful for a rough sense of range and for following the market direction. But it works from data, not from your home as it truly is, and it cannot see the details that determine value.
What a CMA is
A Comparative Market Analysis is an agent's professional assessment of what a specific home should sell for, built from recently sold comparable properties that were adjusted for differences — condition, upgrades, square footage, lot, location within the area — plus current competing listings and market conditions. It looks at your actual home, not a model of it.
Why they disagree
The main reason an online estimate and a CMA differ is data: an algorithm often cannot see a renovation, an addition, deferred maintenance, a particularly desirable street or water view, or the specifics that make comparable sales meaningful. It may also rely on imperfect county or listing data about the home itself. Where the compiled-tax or listing details are inaccurate, the estimate follows them.
When the online number is useful
Use the automated estimate to get oriented — a starting ballpark of your home's range and how the neighborhood is trending. It is a reasonable tool for an initial conversation about whether selling makes sense. It should never be the number you list your home at, because listing price determines the market's response to it.
When you need a CMA
When it is time to actually list, negotiate, or decide on an offer, you need a valuation anchored in real, adjusted comparables and current market conditions — which is what a CMA and, for financing, an appraisal provide. Pricing too high costs you showings and time on market; pricing too low leaves money on the table. The stakes justify the professional analysis.
A CMA is not an appraisal
A CMA is an agent's marketing-pricing tool, not the same as a licensed appraisal. An appraisal is typically ordered by a lender for financing and follows the appraiser's standards. They may not agree either, and both can differ from the selling price — each serves a different purpose. For your own pricing decision, the CMA is the relevant starting point.
The best valuation happens on your home, not on a screen
Carolin prepares a personalized CMA for your home — walking the property, pulling the right comparables, and pricing it to attract attention without leaving value behind. If you have an online estimate, bring it along and Carolin will show you how it should be interpreted for your specific home.
What is your home worth?
Request a free, no-obligation valuation and get Carolin's professional take — beyond what an algorithm can tell you.
About Carolin
Carolin Bohn is a REALTOR® with Exit King Realty who provides real estate guidance to buyers, sellers, and relocation clients throughout Sarasota and surrounding Southwest Florida communities.
More about Carolin