How Much Is My House Worth? A Complete Guide to Home Value in 2026

"How much is my house worth?" is the question behind almost every real estate decision: selling, refinancing, renting it out, splitting an estate, or simply checking whether the neighbor's asking price is fantasy. The frustrating part is that four different numbers claim to be "the value" of the same house, and they can be $50,000 apart. This guide sorts them out, explains how professionals build a value from comparable sales, and shows what you can do yourself in an afternoon. It also says plainly what still needs a licensed appraiser.

Four numbers that all claim to be "the value"

Before you type "what is my home worth" into a search box or look up a property value by address, know which value you are looking at. They answer different questions.

The distinction matters in practice. A county assessment that has not been updated since a reassessment several years ago tells you almost nothing about today's sale price; an appraisal from your 2021 refinance is a snapshot of 2021, not of now. The market value of a home is what you want when you sell, buy, rent or negotiate, and it is always an estimate until a contract closes.

How much is my house worth? Five ways to get a number today

Most owners need the third or fourth column: enough evidence to make a decision and to argue with, without paying for the fifth until a lender or court asks for it. To see what a cited report looks like before spending anything, open the free preview for your address, which lays out every section of the report with the figures blurred until you buy; the sample reports show finished examples for Los Angeles, Vienna, Berlin, Paris, Madrid and Rome.

How the number is actually built: comps and adjustments

Every serious valuation of a house, whether by an appraiser, an agent or a model, rests on the same idea: the sales comparison approach. You find recently sold homes that a buyer would consider substitutes for yours, and you adjust their prices for the differences.

Appraisers on conforming loans work to a codified form of the same rule. Fannie Mae's Selling Guide expects comparables that closed within the past twelve months as the norm, without treating the freshest sale as the strongest one by default; they should come from the subject's own market area where possible and resemble it in site, room count, finished area, style and condition, with whatever differences remain adjusted for⁶. The appraiser has to put at least three closed sales in the report and may add pending contracts or current listings as supporting evidence⁶.

The adjustment logic looks like this: if a comparable has one more bathroom than your house, its sale price is adjusted down by what a bathroom is worth in that neighborhood before it is used as evidence for yours. If it lacks your garage, its price is adjusted up. After adjusting three to six comparables, their adjusted prices should cluster; that cluster is your value range, and the point value sits where the best comparables agree.

Two rules of thumb separate a good analysis from a bad one:

1. Proximity beats similarity, up to a point. A slightly different house on the same street usually says more than an identical house two miles away, because location is the largest single driver of price. In rural areas the radius has to widen; in dense cities a few blocks can be a different market.
2. Adjustments must come from local sales, not from national averages. A "kitchen remodel returns 70 percent" statistic from a magazine is not evidence for your block. The value of a feature is what local buyers paid extra for it.

Comparable sales are covered step by step in a separate guide, including where to find closed prices when the public record lags.

Price per square foot: useful, and easy to misuse

Price per square foot is the fastest sanity check and the most abused statistic in real estate. It works when the comparables are truly similar in size, because it normalizes for the biggest quantitative difference. It misleads when sizes differ a lot: smaller homes almost always sell for more per square foot than larger homes in the same area, because the land, the kitchen and the bathrooms are fixed costs spread over fewer square feet.

So a 1,200 sq ft home at $400/sq ft does not mean your 2,400 sq ft home is worth $960,000. The right use is narrow: compare your home to sales within roughly 20 percent of its size, then apply the range. The guide to using price per square foot without being misled shows the typical curve and how appraisers handle it.

What moves your home's value most

Not every feature is worth what it cost. In the order that matters in most US markets:

• Location: school district, commute, street, view, noise. Fixed, and the largest driver.
• Size and layout: living area, bedroom and bathroom count, usable basements. Measured, not guessed: the county record and your own measurement can differ.
• Condition and age: roof, HVAC, windows, kitchen and bathroom finishes; buyers price deferred maintenance twice (cost plus hassle).
• Lot: size, usable yard, privacy, flood status.
• Energy and systems: insulation, solar (owned, not leased), efficient heating; increasingly visible in buyer preferences and utility bills.
• Garage and parking, then pool, outbuildings and finishes. These depend on the market: a pool adds value in Phoenix and can subtract it in Minneapolis.

The what-increases-home-value guide lists typical adjustment ranges with their sources and which improvements return their cost.

A worked example (hypothetical figures)

Suppose you own a 1,650 sq ft, three-bedroom, two-bath house built in 1994 on a quarter acre, average condition, two-car garage. Three closed sales in your subdivision in the last five months:

The adjusted prices cluster between $432,000 and $448,000. Comparable A is the strongest evidence (closest, most recent), so a point value around $438,000 with a range of $430,000–$448,000 is defensible. Notice what the example does not do: it does not average the raw sale prices ($447,667) and it does not multiply your square footage by comparable C's price per square foot ($247 × 1,650 = $408,000). Both shortcuts produce numbers that look precise and are wrong.

The example also shows why two honest analyses can differ by a few percent: the size adjustment of $60 per sq ft, the $8,000 for a garage bay and the $15,000 for a kitchen are judgments supported by local evidence, not constants. That is the normal uncertainty of valuation, and it is why a range is more honest than a single figure.

How accurate are online estimates?

Every free home value estimate by address on a portal comes from an automated valuation model (AVM), which runs the same comparison at scale with public records and listing data instead of a walk-through. The two largest US portals publish their error rates. Redfin reports a median error of 1.88 percent for homes that are on the market and 7.35 percent for off-market homes, figures it last updated in September 2025⁴; Zillow reports the same pattern for the Zestimate, with on-market homes far more accurate than off-market ones⁵. The reason is simple: a listing tells the model the current condition, photos and asking price; an off-market record tells it only what the county knows.

Translate the percentages into dollars before you rely on them. At a $450,000 value, a 7 percent median error means half of all off-market estimates are more than about $31,500 off in one direction or the other, and a median says nothing about the tail. Renovated homes, unusual layouts, rural properties and neighborhoods with few sales are exactly where models drift furthest. The estimator comparison tests the main tools against each other and explains the published methodologies.

The practical rule: use an AVM to get oriented, then look at the comparables yourself. A number without its comparables is a guess with a decimal point.

Reading the market around your house

Your value also moves with the market, and two free official series tell you which way. The FHFA House Price Index tracks repeat sales of single-family homes with conforming mortgages by state and metro area and is the standard reference for price trends¹; Freddie Mac publishes a second monthly repeat-transactions index that is useful as a cross-check². For tempo, meaning how fast homes sell, how much inventory there is and where the median existing-home price stands, the National Association of Realtors' monthly existing-home sales release is the source everyone quotes; the August 2026 release counted sales at an annual rate of 3.98 million, 1.62 million homes in inventory and 4.9 months' supply, the highest in more than ten years³. The Census Bureau's American Community Survey adds owner-reported values and housing characteristics down to the neighborhood level, which is context rather than a price⁸.

Read these the way an appraiser does: a metro index up 4 percent year over year does not mean your house rose 4 percent, but it tells you whether a comparable from ten months ago needs a time adjustment, and in which direction⁶.

What CheckValue shows for your address

Everything this guide asks you to do by hand, from picking the comparables to time-adjusting the oldest one, is what a CheckValue report does for a single address and then lays out on the page. Three parts of it answer the question in the title:

• The value as a range, not a point. The point value sits inside a range, with the price per square foot set against the district average, so the first question of this guide ("which value am I looking at?") gets a plain answer: market value, with its uncertainty shown instead of hidden behind a decimal.
• The comparables it rests on. The recent sales the value leans on are listed, next to the official price index for the area and the current market tempo. That is the worked example above, done for your house, and it is the part to read first.
• The adjustments and their sources. Each adjustment states its coefficient and where that figure came from, and the official sources are numbered at the end, so a skeptical spouse, buyer or agent can check the reasoning rather than argue with the result.

Ask the same question twice and you get the same answer: results are kept in a registry, calculated in two separate runs and tested for plausibility before they are shown. Nobody walks through your house, so this is not a licensed appraisal; when a lender, a court or the IRS insists on a USPAP appraisal, the report helps you prepare for that conversation but does not stand in for the document⁷. How the method works and where its limits are is described on the accuracy and method page.

When you need a licensed appraisal instead

Order a licensed appraisal when a third party will rely on the number: a mortgage or refinance (the lender orders it), an estate valuation for tax purposes, a divorce settlement, a property tax appeal in some counties, or a dispute where a signed, dated opinion of value under USPAP carries weight⁷. Expect about $357 on average⁹ and a turnaround of days to weeks; the appraisal guide covers cost, process and what to prepare.

For everything before that point, such as deciding whether to sell, checking a listing price, setting a rent (the rent estimate guide covers that side) or understanding what a renovation did to your equity, comparable sales and a cited report answer the question faster, cheaper and with the reasoning visible.

This is general information, not legal or tax advice. Every law and figure above carries its year; the cited source has the current version.

This article is general information, not legal, tax or investment advice. Figures and rules carry the year they were published; check the cited source for the current version.

Christian Eckmair

Co-founder, CheckValue · More than 20 years in real estate in Tenerife and Austria · Reviewed by Josef Eckmair MBA

Christian Eckmair is co-founder of CheckValue and of CBDNOL GmbH (Ansfelden, Austria). He has worked in real estate for more than 20 years in Tenerife and Austria – buying, renovating, letting and selling residential property – and writes about home values, buying checks and ownership records.

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