How Much Is My House Worth? The Three Numbers You'll Get, and Why They Don't Match

The Three Numbers You'll Actually Get

Ask "how much is my house worth" and you'll get at least three different answers depending on who or what you ask. An online estimate, sometimes called an automated valuation model, runs your address through public records and recent comparable sales without anyone inspecting the property. A real estate agent's comparative market analysis, or CMA, uses the same comparable-sales idea but adds a human who's actually seen your house, or at least photos of it, and knows what's moving in your specific neighborhood right now. A formal appraisal, done by a state-licensed appraiser, is the most rigorous of the three and the one lenders require before funding a mortgage.

None of these numbers is "the" value of your house. Market value is really just the price a willing buyer and willing seller agree to in an arm's-length sale. Everything before that sale, the online estimate, the CMA, the appraisal, is a prediction of what that number might be, built with different data and different amounts of human judgment.

How an Online Home Value Estimate Actually Works

An automated valuation model works from data, not a walkthrough. It pulls your county's tax assessor records, recorded deed sales, square footage, lot size, and bedroom and bathroom counts, then compares your house against recently sold homes nearby with similar characteristics. Zillow publishes its own accuracy figures for its Zestimate tool and is explicit that it's a starting point, not an appraisal, with a wider margin of error for homes that aren't currently listed for sale than for ones that are.

That gap matters. A model that's never seen your renovated kitchen or your cracked foundation is working with averages, not your specific house. Federal financial regulators have gone as far as writing quality-control standards for these automated models, precisely because lenders started leaning on them for certain loan decisions and needed guardrails around how reliable they actually are.

When a Number From a Website Isn't Enough

An online estimate is fine for a quick gut check. It's not enough when money or a legal outcome depends on the number. Refinancing, settling an estate, dividing assets in a divorce, or contesting a property tax assessment all typically require either a licensed appraiser's report or, at minimum, a detailed CMA from an agent who can defend the number with specific comparable sales.

The tradeoff is time and cost. An appraisal usually runs a few hundred dollars and takes days to schedule and complete. A CMA from an agent is usually free but comes with the expectation you'll list with that agent. Both are slower than typing an address into a website, and both are more defensible if anyone ever questions the number.

A Fourth Option: Compare Your Fast Cash Offer and Premium Cash Offer

You can move beyond an estimated value by comparing two offers for your specific house. With Cash Flow Deals, you choose the Fast Cash Offer, where we buy your house as-is and close, or the Premium Cash Offer, where a pre-approved FHA or conventional buyer we already have, ready to go, pays more and buys directly from you.

For either offer, the number is agreed before any work starts, and it changes only if you agree. The one exception: if something structural surfaces that was not visible or disclosed before we signed — foundation issues, hidden moisture, old wiring, cast-iron drain failure — we re-cost it and bring the number back to you. You decide. You can walk away. We disclose what we know at offer time so this almost never happens.

We cover repair costs, and we figure out a way, so nothing comes out of your pocket. With Premium, only what the buyer's lender requires gets fixed, with repair costs settled from the sale proceeds from our share. With Fast Cash, we buy as-is, with no repairs for you to make.

With the Premium Cash Offer, the buyer's lender funds the purchase directly from you. If the buyer's loan falls through, that is our problem, not yours, and you can still take the Fast Cash Offer at its own number. You can compare both offers and choose the terms that fit your situation.