Should I Trust Online Real Estate Estimates or My Realtor?

Quick Answer: Online estimates are a reasonable starting point but are built from public data and algorithms that can't account for your home's actual condition, recent upgrades, or hyperlocal factors. A realtor's comparative market analysis draws on the same sold data plus firsthand knowledge of your specific street and property, which is why the two numbers often differ, sometimes significantly.

How Online Estimates Are Built

Automated valuation models pull from public records and recent sales data to generate a number algorithmically, without anyone actually seeing your home's interior, condition, or recent renovations.

What a Realtor's CMA Adds

A comparative market analysis starts with the same sold comparables but adds firsthand knowledge of your home's specific condition, upgrades, and how it compares to similar homes that have actually sold nearby recently.

Where Online Estimates Tend to Miss

Estimates can be noticeably off in neighborhoods with limited recent sales data, homes with unique features or major renovations, and fast moving markets where recent activity hasn't been fully reflected yet.

Using Both Together

The most useful approach is treating an online estimate as a rough starting point and your realtor's CMA as the more precise number, since the CMA accounts for details an algorithm simply can't see.

When the Numbers Disagree

If your realtor's estimate is meaningfully different from an online tool, ask them to walk you through the specific comparables they used and why. A good agent can explain the gap in concrete terms tied to actual data.

Frequently Asked Questions

Are online home value estimates accurate?

They can be a reasonable starting point but often miss condition, upgrades, and hyperlocal factors that affect actual value.

Why would my realtor's estimate be different from an online tool?

A realtor's CMA incorporates firsthand knowledge of your home and recent comparable sales your realtor has direct insight into, which an algorithm can't fully capture.

Should I ignore online estimates entirely?

Not necessarily, they can be useful for a rough sense of value, but treat your realtor's CMA as the more reliable number for actual pricing decisions.