You pull up Zillow, type in your address, and get a number. Maybe it’s $450,000. Maybe it’s $512,000. Either way, it feels like an answer — a real number you can take to the bank.
Except here’s the thing: it might be off by $30,000, $50,000, or more. And if you’re buying or selling this summer, that gap could cost you big.
Automated home valuations have gotten better over the years. But they’re still working from incomplete data, and in a market like summer 2026, incomplete data can lead you in the wrong direction fast.
Here’s what’s actually going on behind those numbers — and what you should pay attention to instead.
How Automated Estimates Actually Work
Zillow, Redfin, and other platforms generate their estimates using what’s called an Automated Valuation Model, or AVM. These tools are essentially algorithms that look at publicly available data — recent sale prices in your area, your home’s square footage, the number of bedrooms and bathrooms, tax records — and crunch the numbers to come up with a value.
It sounds thorough. And in stable markets where homes are similar to one another and data is plentiful, AVMs can be reasonably accurate.
But they have a fundamental limitation: they can only work with what they can see. If your area doesn’t have a lot of recent comparable sales, the algorithm fills in the gaps with older data — sometimes from a market that looks nothing like today’s. And if your home has features that aren’t captured in public records? The AVM doesn’t know about them. It can’t walk your hallways or look out your windows.
What Zillow Can’t See
This is where the gap between the estimate and reality really opens up.
Think about condition. Zillow doesn’t know if your kitchen was updated last year or still has the original 1994 oak cabinets. It doesn’t know if your roof is brand new or quietly leaking. It can’t tell if the backyard is a beautifully landscaped outdoor living space or an overgrown mess.
It also can’t account for location nuances that local buyers feel instantly. On paper, two homes on the same street with the same square footage might look identical. But one backs up to a busy road and one has a mountain view. One is three blocks from the good elementary school and one is on the wrong side of the district line. Those differences move the market — and Zillow misses them.
Then there’s the matter of recent improvements. If you’ve added a finished basement, replaced the HVAC, put in new floors, or upgraded the primary suite in the last year or two, those investments almost certainly haven’t made it into the data Zillow is pulling from. The algorithm doesn’t get a tour.
Summer 2026: A Market That Requires Local Eyes
Here’s the other piece of the puzzle: the market right now is not uniform.
In some markets, inventory has ticked up meaningfully, giving buyers more negotiating room than they’ve had in years. In others, demand is still outpacing supply in specific price ranges and neighborhoods, and properly priced homes are still moving fast.
What this means is that a national tool — or even a regional one — is going to struggle to give you an accurate read on what’s happening at the street level. The trends in your zip code might look nothing like what’s happening five miles away.
Seasonal patterns matter too. Summer tends to bring a wave of motivated buyers who’ve been sitting on the sidelines waiting for kids to finish school. That spike in demand can push prices in certain markets. But it also means more competition, more showings, and more noise in the data.
“The homeowners and buyers we see get into trouble when they assume a national estimate reflects what’s happening in their specific neighborhood,” says Mike Oddo, CEO of HouseJet. “A number without local context isn’t a price — it’s a guess....and sometimes a wild one at that.”
The Renovations That Actually Move the Needle
Not all home improvements are created equal when it comes to value.
Updated kitchens and bathrooms consistently rank among the most impactful improvements when it comes to how buyers perceive value. Energy efficiency upgrades — new windows, insulation, a heat pump system — are getting more attention as buyers factor ongoing utility costs into their decisions.
Curb appeal matters more than most sellers expect. Buyers make emotional decisions fast, often in the first 30 seconds of pulling into a driveway. Fresh landscaping, a painted front door, clean walkways — these things are cheap relative to what they return.
On the flip side, some improvements that feel significant don’t translate well to resale. Highly personalized renovations, luxury upgrades in a mid-range neighborhood, or improvements that aren’t consistent with comparable homes can actually make your home harder to price accurately. You might have spent $60,000 on a pool, but if no one in your market is expecting a pool, you may see only a fraction of that reflected in offers. A local expert can tell you which of your improvements buyers are actually paying for — and which ones you’re enjoying but probably won’t recover.
Why Timing Changes Everything
Even if you had a perfect automated valuation today, it would already be drifting by tomorrow.
Markets are moving. Interest rates shift buyer behavior sometimes week to week. A new listing that hits the market nearby can change how buyers perceive your home’s value within days. The best time to sell in your area might be right now — or it might be six weeks from now when a competing inventory surge eases.
This is why real estate professionals talk about “pricing windows.” The right price isn’t just about what your home is worth in the abstract. It’s about what buyers are willing to pay at this moment, in this market, given everything else they’re seeing. List too high and you’ll sit. List too low and you leave money on the table. Getting that number right requires knowing what’s happening on the ground — not what an algorithm calculated last week.
The Right Questions Lead to the Right Number
The most valuable thing you can do right now — whether you’re thinking about selling or just trying to understand what you own — is get a real conversation going with someone who actually knows your market. Overpricing your home in this market is a one-way ticket a an expired listing (and maybe even your home not selling at all).
At HouseJet, one thing we consistently tell consumers is that the best thing you can bring to that conversation is good questions. Not just “what’s my home worth?” — but: What have homes like mine actually sold for in the last 60 days? What are buyers prioritizing right now in this price range? Are there improvements I should make before listing, or should I price accordingly and let buyers do their own updates? Which recent sales are actually comparable to mine, and which ones aren’t?
Those kinds of questions unlock real insight. And real insight — not an automated number — is what actually helps you make a confident decision.
The Zestimate is a starting point, not a destination. Treat it like a rough sketch and then go find the real picture.
