The honest answer is not a number. It's a range, and the range narrows as you get closer to listing. Here's why, and here's how I get to one.
I recently ran five automated estimates on the same house, on the same day. Measured against the lowest of them, here's where they landed:
One house, one day, five sources that all claim to know what it's worth.
The median single-family home in Arvada closed at $645,000 in August 2026. Apply that same spread to a house at that price and the gap between the highest and lowest estimate is more than eighty thousand dollars. That's the difference between pricing with confidence and guessing.
So the honest answer to what your home is worth isn't a number. It's a range, and the range narrows as you get closer to listing.
Automated estimates work from what they can count: square footage, bed and bath count, lot size, recent sales nearby. They can't account for condition, or for the features that make your house different from the one down the street.
They also can't see layout or flow, which is frequently what decides how a house actually lives. A powder room opening straight off the dining room. A bedroom you can only reach by walking through another bedroom. A kitchen that dead-ends where it should open up. An automated estimate counts the half bath as a half bath. It has no idea where the door is, or what a buyer thinks when they walk in and see it.
But the biggest thing they miss isn't data at all. An automated estimate can't feel the love a homeowner has put into a house, or the absence of it. Whether the maintenance kept up. Whether the projects got finished. Whether it's been a while since anything was touched. Two houses with identical specifications can be tens of thousands of dollars apart on that alone, and no algorithm will ever see it.
None of this makes these tools useless. They're a reasonable reference point and worth looking at. They just shouldn't be the number you plan around.
Open space and trail access. This is the big one. Backing to open space, or having the Ralston Creek trail at your doorstep, is the kind of thing that sets one home apart from an otherwise identical one down the block. Coloradans place real value on it. No algorithm prices it, because it isn't a field in any database.
Foothills views. Almost never captured, and least of all when the view belongs to only one or a few homes in a neighborhood. The estimate is looking at what your neighbors sold for. It isn't looking out your windows.
Public square footage records on Arvada's older homes can also run inaccurate, though in my experience not dramatically.
Here's something most sellers don't know. Once your home is listed, Zillow pulls the data from the listing and updates the Zestimate, and the updated number lands very close to your list price.
Read that again, because the implication matters. After you list, the Zestimate isn't independent confirmation that your price is right. It's an echo of the price you chose. If you're using it to check your agent's pricing, you're checking the number against itself.
Before you list, it's a rough reference point. After you list, it tells you nothing.
Not a formula, but not a guess either.
That second step is the one no algorithm performs, and on an unusual house it moves the number more than the rest combined.
The range comes first. The number comes last, usually within a few days of going live. That isn't indecision.
The single biggest reason: a home closing in your neighborhood right before you list is the strongest comp there is. Especially one with a similar layout and presentation to yours. A sale that closes the week before you go live tells us more than anything from four months ago, and waiting for it is worth more than committing early.
Alongside that, competing inventory shifts, and neighbors who listed aggressively either sell or sit. Either outcome is useful. If one sells quickly, it becomes a comp. If it sits, that's worth knowing too.
Through the frenzy of 2020 into mid-2022, updates before listing often weren't necessary. Homes moved fast enough that the money and the delay rarely paid for themselves.
That's no longer the case. Move-in ready homes have continued to perform particularly well, and updates done properly can return real money in a way they didn't during the frenzy.
This shows up most clearly in a same-subdivision, same-floorplan comparison. Two houses an automated estimate would value identically, landing well apart because one was updated and one wasn't. Which is why preparing a home for market is now part of the pricing conversation rather than a separate step after it.
One caution, though. Not every update returns what people expect it to. Some cost more than they add, and a few add nothing at all.
Here's the line I'd draw. If you're updating a home you plan to stay in, do what makes you happy. It's your house and you're the one living in it. But if selling is anywhere on the radar, or if you're making the change specifically to help the home sell, reach out before you spend the money. I'll tell you honestly what buyers around here are paying for right now and what they're walking straight past.
That conversation costs nothing and comes with no obligation. It's a great deal cheaper than finding out afterward that the money didn't come back.
I don't think it's automatically wrong to list above where the comps point. It's wrong to do it without a plan.
If we want to test a higher number, we agree in advance on what we're watching and when we act. Showing activity and buyer feedback over the first two to three weeks tell us quickly whether the market agrees. If it doesn't, we adjust on the timeline we set at the start, rather than deciding what to do in the moment.
Without that plan, it's a different story. In today's market, unrealistic pricing may be the single biggest disservice you can do to a property. The home sits, the days on market climb, and it picks up a stigma that's very hard to shake. Buyers see a listing that's been sitting and assume something is wrong with it, which means the eventual sale price is often below what a realistic price would have achieved on day one.
By the time a reduction happens on that path, it isn't a strategy. It's a rescue.
And to be clear about who decides: my job is to give you clear data and honest guidance. You're always in control of how we position your home.
An automated estimate is one data point to weigh, not an answer. This is where an in-person visit matters, and I'm always happy to do one with no obligation attached.
You don't have to be ready to sell. Plenty of these conversations are just someone working out whether a move makes sense at all. You'll leave with a realistic range and a net sheet showing what a sale would actually put in your pocket, which is the information you need to plan around, whether you list in three months or three years.
I live in Arvada. My wife and I bought our own fixer-upper here and converted it ourselves, which is a large part of why I have opinions about which updates return and which ones don't.