How Much Is Your Portland or Vancouver Home Really Worth?

How much is your home worth in Portland or Vancouver — and is the Zestimate accurate?

Your Zestimate is a fine starting point, but it's not a reliable price. Zillow's own published data shows the Zestimate is off by a median of about 7% on off-market homes — on a typical $535,000 Portland-area home, that's roughly $37,000 in either direction. A comparative market analysis, or CMA, prepared by a local agent adjusts for your home's actual condition, updates, and recent neighborhood sales, and it generally lands within 2% to 4% of the eventual sale price. To price your home for a real sale, you need a CMA, not an algorithm.

By Rick Sadle | August 21, 2026

"What's my home worth?" is the first question almost every seller asks me — and most people have already peeked at their Zestimate before they call. That number isn't worthless, but it's routinely misunderstood, and pricing your home off of it can cost you real money in both directions. Here's how home valuation actually works in the Portland and Vancouver market, what the Zestimate gets right and wrong, and how to land on a number you can trust.

What a Zestimate really is — and how accurate it is

A Zestimate is Zillow's automated valuation. A computer model reads public records, tax data, and nearby sales, then spits out an estimate. It's fast, it's free, and it's a reasonable ballpark.

But "ballpark" is the key word. Zillow publishes its own accuracy data, and there are two very different numbers:

• On-market homes: a median error rate of about 2%. These are homes actively listed for sale, where Zillow can already see the asking price and recent activity.
• Off-market homes: a median error rate of about 7%. These are homes that aren't listed — which is exactly the situation you're in when you're just thinking about selling and checking your value.

That second number is the one that matters to you. On a $535,000 home — right around the current median sale price in the Portland metro — a 7% swing is about $37,000 in either direction. Price $37,000 too high and your home sits; price $37,000 too low and you hand that money to the buyer. Neither mistake is small.

There's a subtle trap here, too. Zillow measures accuracy using the most recent Zestimate before a sale, and once a home hits the market, the Zestimate tends to drift toward the list price. So the impressive on-market accuracy is partly Zillow following the market — not predicting it.

Why a CMA is a more accurate number

A comparative market analysis is how agents actually price homes. I pull three to six recent sales of homes genuinely like yours — same area, similar size, beds, baths, age, and condition — from the past few months, then adjust up or down for the real differences: square footage, a renovated kitchen, a new roof, a finished basement, lot size, a view, or the busy street out front.

A well-built CMA typically lands within 2% to 4% of the final sale price — on that same $535,000 home, that's roughly a $10,000 to $21,000 window, versus the Zestimate's $37,000. The gap comes down to one thing an algorithm can't do: it has never been inside your house. It has no idea about the condition of your house versus the other houses in the neighborhood. It doesn't know you redid the primary bath, or that the comp down the street backs to a greenbelt while yours backs to the highway.

In our market, that local knowledge matters more than most sellers expect. Values in Portland and Vancouver can shift block to block — a Craftsman in Alameda, a bungalow in Sellwood-Moreland, and a newer build in Camas can all carry a $535,000 price tag for completely different reasons, and the comps that fit one won't fit another. This is exactly the kind of question I walk sellers through before we ever settle on a list price.

The value on your screen isn't the only "value"

It's worth clearing up three numbers that get tangled together, because they're not the same thing:

• Market value — what a buyer will actually pay today. This is what a CMA estimates and what your list price should be built on.
• Appraised value — what a lender's appraiser says the home is worth to support the buyer's loan. It can come in below the agreed price, which creates its own set of decisions. We break that down in our guide to what happens when your appraisal comes in low.
• Assessed value — the county's figure for property-tax purposes, which in Oregon in particular can sit far from market value. It's not a pricing tool at all, as we cover in our Portland vs. Vancouver property tax comparison.

When a seller tells me "the county says it's worth X" or "Zillow says Y," we're almost always talking about the wrong number for the job.

How to actually use these tools

You don't have to choose between technology and an agent — use both, in the right order:

1. Start with the Zestimate for a rough sense of the neighborhood and to watch the general trend over time.
2. Cross-check with a second source like the Redfin Estimate; if two algorithms disagree by tens of thousands, that spread tells you how uncertain the automated number really is.
3. Get a CMA before you make any decision that depends on the price — listing, refinancing, buying out a co-owner, or just deciding whether selling pencils out for you.

Pricing is where more sellers lose money than almost anywhere else in the transaction — overpricing early is one of the most common reasons a home lingers, which we dig into in our post on why homes aren't selling. The right price out of the gate is what draws the strongest offers.

Frequently Asked Questions

How accurate is the Zillow Zestimate in Portland and Vancouver?

Zillow's published data shows a median error of about 2% for homes already listed and about 7% for off-market homes. Since you're off-market when you first check your value, treat the Zestimate as a rough ballpark — on a $535,000 home, a 7% error is roughly $37,000.

What is a CMA and how is it different from a Zestimate?

A comparative market analysis is a pricing estimate an agent builds from recent sales of comparable homes, adjusted for your home's condition, size, and features. Unlike a Zestimate, it accounts for what's actually inside and around your home, and it typically lands within 2% to 4% of the final sale price.

Is a CMA the same as an appraisal?

No. A CMA is an agent's market-based pricing estimate to help you set a list price, and it's usually free. An appraisal is a licensed appraiser's formal valuation, often ordered by the buyer's lender, and it carries a fee. The two can differ.

How much does it cost to get my home's value from an agent?

A CMA from a local agent is typically free and comes with no obligation to list. It's one of the most useful things you can request before deciding whether and when to sell.

Why is my Zestimate so different from my neighbor's sale price?

Because the model can't see interior condition, renovations, or the specific differences between your home and the ones nearby. Two homes on the same street can sell for very different prices based on updates, layout, lot, and view — details a CMA captures and an algorithm misses.

If you want a real number for your Portland or Vancouver home, the answer isn't on a website — it comes from looking at your actual home against the homes that just sold around it. I'm happy to prepare a no-obligation CMA and walk you through what your home would realistically sell for today. Reach out anytime.

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About Rick Sadle
Rick Sadle is the Principal Broker and CEO of The Sadle Home Selling Team at Keller Williams Realty Professionals, serving the Portland, Oregon and Vancouver, Washington real estate markets. With more than 20 years of real estate experience, over 3,500 homes sold and more than $1 billion in team sales volume, Rick is one of the Portland area's most experienced real estate professionals. He is also a weekly real estate expert on KXL 101 FM, where he discusses the Portland and Vancouver housing markets, mortgage rates, housing trends and the economy. Rick is an Oregon-licensed Principal Broker and Washington-licensed Broker.

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Sources

• Zillow — Zestimate accuracy and median error rates (on-market vs. off-market): zillow.com
• Redfin — Portland, OR housing market (median sale price context): redfin.com
• National Association of Realtors — Comparative Market Analysis overview: nar.realtor

This article is general information, not financial, tax, or legal advice. A CMA is an estimate of market value, not a guarantee of sale price. Verify tax and legal details with a qualified professional.