What’s Your Portland Home Actually Worth?

Automated estimates average broad data and cannot see your home’s condition, construction, light, updates, or buyer appeal. I analyze comparable sales using appraiser methodology, then apply local judgment to the details that actually move value.

How far off are the online estimates?

The honest answer, using the platforms’ own published numbers: for a home that’s actively listed, they’re decent. For a home that isn’t on the market yet, which is exactly when you’re deciding what your home is worth: they miss by a lot.

Estimator

Home is listed

Home is NOT listed

Redfin Estimate

1.86% median error, homes for sale

7.26% median error, off-market homes

Redfin Estimate accuracy as published by Redfin at redfin.com/redfin-estimate, checked September 2026: 1.86% median error for homes for sale and 7.26% for off-market homes. These are Redfin’s overall published medians, not Portland-specific figures. Zillow and Realtor.com figures are withheld here pending verification against their current published sources.

I price homes the way appraisers do: hand-picked comparables, adjusted line by line for condition, lot, systems, and (because I spent a 23-year career in structural engineering) for the construction realities an algorithm can’t see: the foundation, the roof, the quality of that addition, the deferred maintenance or the over-improvement. Then I check my work against the eventual appraisal. The algorithms are a starting point. Your list price shouldn’t be one.

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Questions about online home values

How accurate are the online estimates?

Zillow does not publish a Portland-specific accuracy figure, and its current national figures are not reproduced here until they can be checked against Zillow’s own published source. Redfin publishes a median error of 1.86% for homes listed for sale and 7.26% for off-market homes, measured across its coverage rather than Portland alone. Either way, an automated estimate is a starting range, not a list price.

Why is my Zestimate different from my Realtor.com estimate?

Different companies use different data providers, update schedules, and algorithms, so their automated values routinely disagree. That spread is useful evidence that automated values are ranges, not defensible list prices.

Different companies use different data providers, update schedules, and algorithms. Realtor.com shows three automated valuations at once, and they routinely disagree. That spread is useful evidence that automated values are ranges, not defensible list prices.

What’s more accurate than an online estimate?

A comparative market analysis from a local agent (or a licensed appraisal) is more specific to the property. Nathan’s CMAs use appraiser methodology: hand-picked comparable sales, line-by-line adjustments, and direct evaluation of condition, systems, construction, and lot characteristics.