How Accurate Is Zillow’s Home Estimate?

How much should you trust your Zillow estimate?

A Zillow Zestimate® can be a useful starting point, but it is not an appraisal, a buyer’s offer, or the amount you will take home at closing. For a Central Pennsylvania homeowner, the next step is to compare recent sales of genuinely similar properties and account for the house’s current condition. Take a closer look when your property has acreage, unusual features, significant repairs, or few comparable sales.

By Austin Glanzer, co-founder of 717 Home Buyers.

If you checked Zillow and saw $325,000, it’s natural to start planning around that number. Before deciding whether to list, repair, or sell as-is, ask a more practical question: What evidence supports that value for my house, and what would I actually receive under each selling option?

Why similar neighborhoods are easier to compare

Austin’s experience evaluating Central PA properties points to a useful distinction. In a subdivision, homes may share similar construction dates, square footage, lot sizes, and layouts. Several recent sales can provide a clearer basis for comparison.

Outside those neighborhoods, the differences can become more important. A rural Lancaster County property might have two acres, a wooded section, a septic system, and an addition. A nearby sale might involve five acres and a pole barn. Another might sit on a small lot with public sewer. Being nearby doesn’t make those properties interchangeable.

A nearby sale is useful evidence only when the property is genuinely comparable—or its differences are accounted for. That is why Austin encourages homeowners to look beyond the headline number.

Zillow itself says accuracy depends on the available property and area data. Its explanation of the Zestimate also distinguishes listed homes from off-market homes: listing information adds data that was not previously available. A change after listing does not mean the physical house changed.

How Austin suggests checking comparable sales

Start with recently sold homes rather than treating asking prices as completed transactions. Then narrow the comparison using features that matter to the property:

• Size and layout: similar square footage, bedrooms, bathrooms, and usable living space.
• Land: comparable acreage, usable ground, wooded areas, and outbuildings.
• Location: the same local market and, where practical, the same elementary-school attendance area. Verify boundaries rather than assuming a shared mailing address means the same assignment.
• Property systems: well and septic versus public water and sewer, along with other meaningful differences.
• Condition: a recently renovated home and a house needing a roof or major cleanout should not be treated as equivalent.

Check the facts recorded for your own house, too. Incorrect square footage or missing improvements can weaken the comparison. If there are few good matches, ask a local agent for a comparative market analysis or consider an independent appraisal when you need a formal valuation.

An older home needs a closer look at condition

In the 717 team’s experience, maintenance and condition become increasingly important as homes age, particularly once homes are 20 years old or older. That is an observation from evaluating properties, not a rule that a house becomes difficult to sell at a particular birthday.

A well-maintained older home may be in better shape than a newer one with neglected repairs. What matters is the actual roof, basement, structure, electrical and plumbing systems, and the work a buyer would inherit.

A home’s age is a reason to investigate condition, not an automatic deduction from its value.

Consider this hypothetical Lancaster County comparison: two homes have similar size and acreage, but one has a dry basement and a recently replaced roof, while the other has recurring moisture and a roof needing evaluation. A similar online estimate would not settle what each property could sell for or what work a buyer might request.

Before spending money on improvements, compare the likely benefit with the cost, time, and disruption. Our guide to fixing the house versus selling as-is walks through that decision.

Why financing and inspections can change the transaction

The team’s Lancaster County lending research raised a practical point: the buyer’s financing can matter once the property is evaluated. There are two separate issues—whether the house meets the loan program’s requirements, and what the buyer asks for under the purchase agreement.

Property requirements for the buyer’s loan

FHA financing includes property requirements concerning safety, soundness, and security. Conditions involving the roof, utilities, or other deficiencies may require further evaluation or repairs. HUD’s current FHA handbook is the primary reference; the lender determines how the requirements apply to the transaction.

Conventional financing does not mean condition is irrelevant. Fannie Mae’s property-condition guidance allows certain minor maintenance issues to remain as-is, but deficiencies affecting safety, soundness, or structural integrity can require repairs or a qualified professional’s inspection. Dated finishes and a serious property defect are different issues.

Avoid assuming that every old roof must be replaced or that every cosmetic issue will prevent financing. The actual deficiency, loan program, appraisal findings, and lender’s requirements matter.

Buyer inspections and repair negotiations

An appraisal and a home inspection serve different purposes. The VA’s home-buying guidance explicitly distinguishes them and recommends a home inspection even when a VA appraisal is performed.

Separately, a buyer may request repairs, a credit, or a price adjustment after an inspection. Whether either party can terminate, and what happens next, depends on the contract and its deadlines. Have your agent or attorney explain those provisions before relying on an assumed right to walk away.

An accepted offer is an important step, but it does not eliminate financing conditions or contract negotiations.

A real example from the 717 team

Austin shared a situation reported to him by a team member: a seller already had an accepted offer, but the buyer later wanted several items remedied. The seller considered the work too expensive and too much hassle, refused the requested updates, and the deal fell through.

That example does not establish that Zillow’s estimate was wrong or that a lender required those repairs. It shows why an estimated value cannot predict how a particular buyer and seller will resolve concerns about the actual house.

Compare what you would keep—not just the offer price

A sale price and your proceeds are different numbers. To compare options, start with the expected price and subtract the costs you would actually pay under that proposal: repairs, negotiated credits, selling and closing costs, carrying costs through closing, and any mortgage or other required payoff.

For illustration only, a $325,000 sale with $15,000 of seller-paid repairs and $20,000 of selling costs and credits leaves $290,000 before mortgage payoff and any other obligations. Those are hypothetical figures, not a Lancaster County cost estimate. Replace them with written estimates for your property.

The strongest comparison uses expected proceeds, the work you must complete, the likely timeline, and the conditions that could change the deal.

How an as-is cash offer fits into the comparison

At 717 Home Buyers, the team considers comparable properties, the home’s characteristics, current condition, needed repairs, and the costs involved in purchasing and eventually reselling it. Repairs still affect the offer. Selling as-is changes who handles the work; it does not make that work disappear.

Our article on how cash home buyers determine what to pay explains that process in more detail. Ask any buyer to explain the assumptions behind the number and provide the proposed terms in writing.

• Listing may fit best when the house is well maintained, you can accommodate preparation and showings, and broad market exposure is your priority.
• Repairing first may fit when the work is manageable and credible local advice suggests the benefit justifies the expense and delay.
• An as-is sale may fit when avoiding repairs, cleanout, or repeated negotiations matters enough to consider a lower price.
• Waiting may fit when you do not need to sell now and can comfortably manage the property’s upkeep and ongoing costs.

Use our comparison of selling directly and listing with an agent alongside property-specific estimates. Check who pays each cost, inspection or cancellation provisions, closing timing, and whether the proposed price can change.

Watch the Central PA Property Talk episode

Brian and Chris discuss Austin’s local observations, rural-property comparisons, and what can happen after a seller accepts an offer. Video length: 7 minutes, 36 seconds.

Questions homeowners ask

Should I price my house at the Zestimate?

Use it as one reference point. Compare recent sales, current competition, and your home’s condition with a local agent before setting a listing price. An automated number alone does not establish the right asking price.

Will correcting my Zillow home facts increase the estimate?

It may change the estimate, but an increase is not guaranteed. Zillow explains that some updates may not change its valuation. Use accurate facts rather than trying to reach a preferred number; see Zillow’s guidance on home facts and estimates.

Does a cash offer below Zillow’s estimate mean it is unfair?

The difference alone does not answer that question. Ask what comparable sales, condition assumptions, costs, and terms support the offer. Compare it with a realistic listing outcome and other written offers before deciding.

Read the full podcast conversation

Read the Podcast Transcript to Learn More

Brian: How accurate is Zillow’s Zestimate for your Central Pennsylvania home? If Zillow says your house is worth $325,000, is that really what you should expect to get when you sell it? Welcome to the Central PA Property Talk Podcast from 717 Home Buyers, serving Lancaster, York, Harrisburg, Lebanon, Reading, and communities throughout Central Pennsylvania. I’m your host, Brian, here with my co-host Chris.

Chris: Hey everyone. And this is a good one, because I think almost everybody does this. You start wondering what your house is worth, pull out your phone, type in your address, and there’s the Zillow Zestimate.

Brian: Right. And the Zestimate can be a useful starting point. Even Zillow describes it that way. But Zillow also says it’s an automated estimate of market value, not an appraisal, and that its accuracy depends partly on the information available about your house and homes in the surrounding area.

Chris: So when is that number more likely to be pretty close?

Brian: Austin and the team at 717 Home Buyers deal with this every day, and Austin explained it pretty simply. Imagine you live in a fairly typical suburban neighborhood. Most of the houses were built around the same time. They’re similar sizes, similar lots, maybe three bedrooms, two-and-a-half baths, and there have been several recent sales.

Chris: Zillow has a lot to compare your house with.

Brian: Exactly. Now compare that with a property farther out in Lancaster County or another rural part of Central PA. Maybe you’ve got two acres instead of a quarter acre. Part of it’s wooded. You’re on septic. Your house has an addition. The house down the road has five acres and a pole barn. Another one has half an acre and public sewer. Suddenly, finding a truly comparable property gets more complicated.

Chris: And that sounds like a lot of Central Pennsylvania.

Brian: It is. You can get outside places like Lancaster, Ephrata, Manheim, Elizabethtown, Lebanon, York and other communities pretty quickly and find properties that don’t fit neatly into a subdivision mold.

And Austin’s advice is: don’t just look at the number Zillow gives you. Dig into the comparable sales yourself. Look for houses with similar square footage, similar bedrooms and bathrooms, similar land and property characteristics, and ideally in the same elementary-school area. Zillow itself recommends looking at recently sold homes with similarities in location, size, condition and features when evaluating comparable properties.

Chris: But there’s another issue Zillow can’t necessarily know completely from the data, right? What condition is this house actually in today?

Brian: And that can be huge, especially with an older house.

Based on Austin and the 717 team’s experience evaluating properties around Lancaster and Central PA, this is something they see more often as houses age, and particularly with homes 20 years old or older. Maybe the roof is getting near the end of its useful life. Maybe there’s basement moisture, storm damage, outdated electrical or plumbing, deferred maintenance, an overgrown property, or the house needs a major cleanout.

Zillow may have a lot of information about your property, but it hasn’t walked through your basement or climbed into your attic. In fact, Zillow says unreported additions, updates and remodeling may not be reflected in the Zestimate and recommends supplementing it with additional research or an appraisal or professional evaluation.

Chris: So Zillow might say $325,000, but that doesn’t necessarily mean I’m putting $325,000 in my pocket.

Brian: That’s really the point.

If you list the house, an actual buyer gets involved. There may be a home inspection. There’s typically an appraisal when financing is involved. And depending on the financing and the condition of the property, certain problems can become important.

For example, FHA guidelines address things such as roof condition, structural problems and septic-system deficiencies. Current conventional financing guidelines also allow some minor deferred maintenance to remain as-is, but problems affecting safety, soundness or structural integrity—things like water seepage, active roof leaks, worn shingles, or inadequate electrical or plumbing—can result in repairs being required for the financing.

Chris: So sometimes you don’t really discover the difference between the estimated value and the reality of selling until you’re already in the deal.

Brian: Absolutely. Austin recently told us about a situation that someone on the 717 team encountered. The seller had an offer that had already been accepted. They got further into the transaction, and the buyer wanted several things with the house remedied.

The seller looked at what was being requested—the expense, the work, the hassle—and basically decided, “I don’t want to deal with all of this.” The seller wasn’t willing to make the requested updates, they couldn’t come to terms, and ultimately that deal fell through.

Chris: Which doesn’t necessarily mean Zillow gave them a bad number.

Brian: No. And that distinction is important. An online estimate simply can’t tell you everything that will happen once a real buyer starts evaluating the actual property and negotiating the transaction.

Chris: So how is that different if I call a cash home buyer?

Brian: The repairs still matter. A legitimate cash buyer doesn’t look at a roof that needs replacement and pretend it doesn’t exist.

At 717 Home Buyers, the team looks at comparable properties, the characteristics of the house, its current condition, repairs that may be needed, and the other costs involved in purchasing and eventually reselling the property. Those things help determine what they can realistically offer.

The difference with an as-is cash offer is that you may decide you’d rather take a lower price and let the buyer handle the roof, the cleanout, the water damage, the landscaping or whatever else needs to be done.

Chris: Whereas if my house is in great shape, I’m not in a hurry, and there are plenty of buyers for it, listing it might make more sense.

Brian: Absolutely. If you’ve got a well-maintained house in a desirable neighborhood and your priority is getting maximum exposure to the retail market, talking with a good real estate agent may be your best path.

This isn’t about saying Zillow is wrong or that everybody should sell for cash. It’s about understanding what that Zestimate actually represents.

Chris: So use it as a starting point, not necessarily the final answer.

Brian: Right. And especially take a closer look if you have an older home, a rural property, acreage, unusual features, significant repairs, or just a house that doesn’t look much like the other homes Zillow is comparing it with.

And if you’re wondering whether your Zestimate really reflects what your Central PA house is worth in its current condition, give 717 Home Buyers a call.

We evaluate properties throughout Lancaster County and Central Pennsylvania every day. We can look at your property, look at the comparable sales, consider its current condition and any work it may need, and give you an as-is cash offer. And just as importantly, we can explain how we arrived at that number so you can compare it with your other options and decide what makes the most sense for you.

Call 717-321-SOLD or visit 717homebuyers.com. Thanks for listening to the Central PA Property Talk Podcast from 717 Home Buyers.