Top 5 Buyer Mistakes in Silicon Valley | Say What You Want About Real Estate Ep. 7

If you've spent any time house hunting in San Jose, you already know the market doesn't play by normal rules. On the latest episode of Say What You Want About Real Estate, my co-host Kristina Rogers and I dig into the five mistakes we see buyers make again and again. These mistakes are easy to avoid, and we show you how. Watch and find out how easy it is to make the right moves!

About the Author: Michelle Elliott is a Realtor with Coldwell Banker Realty (DRE# 01777533) specializing in Willow Glen, Cambrian Park, Almaden, and Downtown San Jose, with 20+ years of experience and over $235M in lifetime sales volume. Ranked top 1.5% Nationwide [RealTrends] and top 5% in Santa Clara County, she has been featured on KTVU Fox 2 and co-hosts Say What You Want About Real Estate. Full bio →

Quick Take

Online home value estimates like Zillow's Zestimate can't see a home's condition or upgrades, and any "sold" comp is already at least 30 days old by the time it posts, pending sales are the real current data.
In this episode, we ask AI what we should offer on a home in Willow Glen. The AI suggested that we pay $230K over asking, when in reality the listing in question was still sitting unsold nearly three weeks later, meaning an offer at asking or lower would be more appropriate
There's no such thing as "the right time" to buy in Silicon Valley; the right time is when you can afford it and plan to stay long enough to ride out normal market swings.
Location is permanent; a home's condition is not. Buy for the zip code, then renovate.
School attendance boundaries can shift as San Jose adds housing density; check them directly on the district's website, not from hearsay, and don't assume today's boundary lines are guaranteed tomorrow.

Why shouldn't you trust Zillow's Zestimate when buying a home?

I'll say it every time I get the chance: the Zestimate is not a pricing strategy. It's a guess dressed up as a number. Zillow can't walk through a home. It doesn't know if the kitchen was gutted and redone last year or hasn't been touched since 1998. And Zillow won't even show you the formula it used to land on that number in the first place.

Here's the bigger issue for buyers specifically: any comp you see on Zillow that shows as "sold" is already stale. Most home sales take about 30 days to close, which means a sale that just posted as "closed" actually represents an offer that was accepted a month ago. In a market that's moving — up or down — a month is a long time. The only way to know what's happening right now is to look at pending sales, and that takes a phone call, not a website. That's where working with an agent who specializes in your specific neighborhood matters — someone with the relationships to call the listing agent on a pending sale and actually ask what happened: how many offers came in, and what it's really pending for.

The other Zillow trap is treating active listings as market value. If a home is still sitting on the market, that price tells you what the seller hopes it's worth — not what it's actually worth. Active listings aren't data. They're a starting point, at best.

Can AI like ChatGPT tell you what to offer on a house?

This is the one that surprised even me. As an experiment, we ran an active San Jose-area listing through ChatGPT and asked what a winning offer would look like. It came back with a case that would make sense, generally but ultimately came to the wrong conclusion. At first it pulled comps, cited a competitive market, and recommended offering roughly $230,000 over the asking price. The problem? That home was still unsold almost three weeks later. Any agent could have told you a listing sitting that long, in that kind of market, wasn't headed for a bidding war.

AI tools are useful for a lot of things. Pricing one of the biggest financial decisions of your life isn't one of them, not yet, and maybe not ever, for a few reasons. AI can't see a foundation crack. It doesn't know that the house two doors down was fully remodeled while yours wasn't. And AI has a well-documented habit of telling you what sounds encouraging rather than what's actually true, which is the opposite of what you need when real money is on the line. You need someone to tell you the truth.

Is there ever a "right time" to buy in Silicon Valley?

Short answer: No. The right time to buy is when you can afford it and plan to stay long enough to weather normal ups and downs, generally five to seven years. Interest rates, headlines, and short-term dips all change; your ability to actually own the home doesn't wait around for perfect conditions to line up. If rates are the thing holding you back, I broke down why waiting on them usually backfires in Should I Wait for Interest Rates to Drop? Or if you are worried the market will crash any day now, Is the Silicon Valley Housing Market Crashing? The Truth for Buyers & Sellers is worth a read too.

One trick worth knowing if your dream neighborhood is still out of reach: buy below your means now, as a primary residence, rather than waiting to afford your "forever home." Owner-occupied loans typically come with a lower minimum down payment, lower interest rates, and lower insurance costs than investment property loans do. Live in it, build equity, and when the time is right, you can convert it into a rental while you move up — your tenant's rent works in your favor while your equity keeps growing in the background.

You should also consider the tax advantages if you are sitting on the fence. Owning a home and making it your primary residence for two of the last five years will give you a personal residence capital gains exclusion when you sell. When else can you make hundreds of thousands of dollars tax-free? If you're torn between selling and renting, don't delay buying purely because you're hoping the market gets better. Nobody has a crystal ball on that one. And at the same time, you're paying someone else's mortgage when you could be earning equity and gaining a huge tax advantage.

Should you buy for the house or the location?

You can renovate a kitchen. You cannot renovate a zip code. This is where I see buyers talk themselves into the wrong decision more than almost anywhere else — they fall for a beautifully staged home in a location they didn't actually want, and they assume they'll grow to love it. You won't. If a busy street, a power line, or the general feel of a block doesn't sit right with you on day one, it won't sit right in year three either.

Meanwhile, condition is the thing you have the most control over. Countertops, paint, and cabinet hardware can completely change how a kitchen feels without a full remodel — and you don't have to do it all at once. The most affordable home in the best location is very often the smarter long-term buy over the nicest home in a location you're lukewarm on, because location — not finishes — is what drives long-term value.

If buying in your target location means giving up some square footage, that's a real trade-off worth planning for. In Silicon Valley, a well-used backyard genuinely functions as extra living space — a fire pit and some heat lamps go a long way toward stretching a smaller footprint. Still weighing which part of town fits you best? I put together a side-by-side breakdown in Popular San Jose Neighborhoods: What Buyers Should Know that's a good next stop.

There's also a tax detail worth knowing if you go this route: living in a home for two of the last five years before selling can preserve the personal residence capital gains exclusion. If you're torn between selling and renting when you move, that window can buy you time to decide without giving up the exclusion — just don't delay a sale purely because you're hoping the market gets better. No one can see the future; decide what's best for you. Don't try to tell the future!

Why do school boundaries matter more than you think?

If a specific school matters to your decision, don't rely on secondhand information — check the attendance boundary directly on the school district's own website before you write an offer. And don't assume today's boundary lines are locked in. As San Jose continues adding housing density, attendance boundaries can shift over time, and they tend to shrink rather than expand. If you're buying specifically for a school, aim to be well inside the boundary rather than near its edge, since edges are where changes tend to show up first.

This is an emotional topic for a lot of families, and boundary changes can be genuinely hard on a community. But it's also worth remembering that a home's long-term value and your family's experience in it aren't defined by a single line on a map — and neighborhood schools also mean shared community with the families already around you

Bottom line

None of these five mistakes are really about being unprepared — they're about trusting a shortcut over a human who actually knows the market. Zillow, AI, and "waiting for the right time" all promise a faster answer. In a market like Silicon Valley's, faster usually isn't more accurate. If you've steered clear of all five and you're ready to see what the process actually looks like start to finish, How Long Does It Take to Buy a Home in San Jose from Start to Finish? Walks through exactly that.

Is Zillow's Zestimate accurate enough to price an offer?

No — it can't account for a home's actual condition, upgrades, or how many competing offers a similar home received, and any comp it shows is already at least 30 days old by the time it posts.

Can I use ChatGPT or another AI tool to figure out how much to offer on a house?

It's risky to rely on for pricing. AI can pull comps and sound convincing, but it can't see a home's real condition and tends to give overly confident, overly encouraging answers rather than an honest read of local market activity.

Should I wait for interest rates to drop before buying in San Jose?

Waiting for a "perfect" rate environment usually just delays ownership. If you can afford the payment now and plan to stay long enough to ride out normal market cycles, that's generally a stronger position than trying to time a rate drop

Is it better to buy a nicer house or a better location?

Location, in most cases. A home's finishes and condition can be updated over time; its location — the street, the boundary lines, what's nearby — generally can't be changed.

What is FAQ?How do I check if a home is inside a specific school's boundary?

Check directly on the school district's own website rather than relying on a listing description or a neighbor's assumption, and keep in mind boundaries can shift as the area adds housing..

Full Transcript: SWYWAR Episode 7 — Top 5 Mistakes Home Buyers Make

Intro

Hey there, and welcome back to the next episode of Say What You Want About Real Estate. I'm Michelle Elliott, and I'm Christina Rogers. Today we're talking about the top five mistakes buyers make in Silicon Valley — and this is a topic we talk about all the time in real life, so let's get right into it.

Mistake #1: Trusting Zillow's Zestimate (and active listings) as your comps

If you're checking the Zestimate to try to find comps for a property, that's a mistake. Zillow can't see inside a home, and it doesn't even show you the algorithm it's using to get that number. It can't tell if a home is a fixer-upper or newly remodeled — it just doesn't know.

That's why you need the human component: an agent with relationships who's calling around on homes that have closed and asking, "What kind of activity did you get? How many offers?"

In an ascending market — where prices are moving up — the only way to get truly current data is to check the pendings, because any closed comp you see is already at least 30 days old. Most homes take about 30 days to close, so by the time a sale shows up as "sold," that offer was accepted a month ago. That's old data. You have to look at what's currently pending, and you still need a human being to call those pending listings and ask the agents what they're pending for and how many offers they had. Bonus points if your agent specializes in that specific area and already has those relationships — because agents without local ties sometimes get gatekept. An agent who doesn't know the caller may not share what they're really pending for. It's a relationship business.

The other mistake people make on Zillow is looking at active comps. If a home is still active, ask yourself why. Sellers can list at whatever price they want — over market value, under their real expectations, whatever. Active data isn't data; it's the seller's perception. It's a starting point at best. What actually becomes data is what buyers who are currently in contract decided nearby homes were worth.

So mistake number one is using online estimates to comp properties instead of real MLS data. Your agent can pull accurate, current data and — if they specialize in the area — can tell you where the market is actually headed, not just where it's been.

When professional agents pull comps, they're also disciplined about the age of the data. Even a sale from nine months ago can already be "old news" in a fast-moving market. In a descending market, an older comp might reflect a stronger price than what's happening now; in an ascending market, it might be too low. Typically, agents look at something within roughly 90 days and then adjust — pulling a tighter or wider window depending on how much inventory is available. It's part art, part science: not just what sold in the neighborhood, but which street, which direction it faces, and the timing of that specific sale.

Mistake #2: Using AI (like ChatGPT) to figure out your winning offer price

AI is great for a lot of things — a social media post, sure, it'll even add the emojis. But using it to determine your winning price on a home? Absolutely not. It comes down to the same reason you shouldn't blindly trust Zillow: you need the human component, the art and the science.

As an experiment, an active listing that had just come on the market was plugged into ChatGPT with the question, "What would a winning bid be on this home?" The AI pulled a lot of comps, built a compelling case, and suggested a winning bid roughly $230,000 over the asking price. The home was still on the market almost three weeks later. If you're talking to any realtor, a home sitting on the market for more than about seven days usually isn't going to fetch an over-asking offer in most conditions — so an AI tool confidently suggesting a big overbid on a stale listing is a real problem.

There's also the hallucination issue. AI doesn't want to hurt your feelings — it tends to validate whatever you put in front of it rather than tell you you're wrong, which is its own kind of "toxic positivity." When you're talking about one of the largest financial decisions of your life, that's not the check and balance you want. ChatGPT can't see a foundation crack. It doesn't know that the house down the street has been upgraded more than the one you're looking at. You need a human to make sure the data makes sense in context — that's the check that Zillow and AI simply can't do.

Mistake #3: Trying to time the market

It's impossible. The best time to buy was yesterday, and the next best time is today. There's no such thing as "the best time," especially on the buying side — it's like the frog in the boiling pot: you don't really know what kind of market you were in until you look backwards. The only real answer is buying a property that's right for you, for the long term, when you have the funds and can afford it. That's the right time — because market conditions change. Interest rates are high right now? They change, and you can refinance later. If rates are high, you may also be competing with fewer buyers, which can work in your favor.

Buyers can always find a reason it's "not the right time" — the same way it's never the "right time" to go to the gym. But most people don't regret buying; the regret is almost always "I should have done it sooner."

One relevant personal story: buying a home in the middle of a recession, competing with another buyer, and ultimately going $30,000 over asking to win it — which felt terrifying at the time. Fifteen years later, it's just a funny story, because real estate is a long-term investment. Over time, $30,000 here or there stops mattering because the investment pays for itself.

That said, it's not a magic hold-forever asset either — it has to be a plan. A useful trick, especially for first-time buyers who know a life change (like kids) is coming in the next several years but can't yet afford their target neighborhood: buy below your means now as a primary residence, not an investment property. Primary residences typically come with lower interest rates, lower insurance costs, and a lower minimum down payment (as low as 3.5% for an owner-occupied purchase, versus something like 20–30% typically required for investment properties). Live in it, build equity, and if it later makes sense, convert it into a rental while you buy your next home — your tenant's rent effectively pays down your mortgage while your equity keeps growing.

There's also a tax angle worth knowing about: the personal residence capital gains exclusion generally requires living in the home two of the last five years, and allows single filers to exclude gains up to $250,000 (or $500,000 for a married couple) from taxes. If you're unsure whether to sell or rent when you move, renting for a year or two while you decide can preserve that exemption window — but don't delay a sale purely because you're hoping the market improves. Nobody has a crystal ball; base the decision on what's happening now, not a guess about the future.

Mistake #4: Buying for the condition of the house, not the location

You can always fix a kitchen. You can't fix the zip code. Buyers often get emotionally attached to a home's finished condition and lose sight of the location they said they actually wanted. If you don't love the location on the day you walk in, you're not going to love it more three or four years later — a busy street or a power line behind the house isn't something that changes with time. Trust your gut on anything that's physically permanent about the location.

On the flip side, don't be scared off by a home's condition. Cosmetic issues — countertops, cabinets, paint — can transform a space without a full remodel, and you don't have to renovate everything at once; tackle one project at a time. The most affordable house in the best neighborhood is often a smarter buy than the nicest house in a location you don't love, because location is what drives long-term property value, not finishes.

Sometimes buying for location means trading off square footage. That's a real trade-off, but in Silicon Valley, backyards function as an extension of the living space — outdoor rooms with fire pits, heat lamps, and space to entertain even when the interior square footage is tighter than you'd like.

Mistake #5: Not checking school boundaries carefully — and assuming they're permanent

Check school boundaries directly on the school's own website before making a purchase decision, not secondhand. Even if a home feels "safely" inside a boundary today, boundaries change over time as cities build more multi-family and higher-density housing — attendance zones that were once spread out tend to shrink, not expand. If a specific school is a priority, buy as close to the center of that boundary as possible rather than near the edge, since edges are what shift first.

Change in this area is emotional for a lot of families, and boundary conversations can be genuinely difficult for a community. But it's worth remembering that a home's value and a family's experience aren't determined only by a boundary line — neighborhood schools also mean more shared community with the families already around you.

Sign-off

So those are our top five. Thanks so much for watching — check out our next episode, and we'll see you next time.