Short answer: accurate enough to start from, never accurate enough to price from. An online estimate is a model's read of the records about your home — it has never been inside it. Here is where the number holds up, where it misses, and the one fix that actually improves it.
Every online estimate is built from records: recent sales of nearby homes, tax and parcel data, and the facts on file for yours — beds, baths, square footage, lot, year built. What no record shows is the home itself: its condition, the kitchen you redid, the roof that needs work, the layout quirk every buyer notices. So the model prices an average version of your home. Where homes are standard and sales are plentiful, average is close. Where your home is updated, unusual, or on a street that rarely trades, the gap between the record and the real home is where the error lives.
Each tool chooses its own comparable sales and weights them its own way, and each one's records go stale at a different rate — so the same house gets different values on different sites, sometimes far apart. That disagreement is itself the honest signal: the estimate is a range wearing a single number's clothes. One month's move in either direction means little; the trend over several months, as new nearby sales close and the record refreshes, is the part worth watching.
You cannot argue a model into accuracy, but you can fix its inputs. Check the facts the estimate carries for your home and correct what is wrong — the finished basement counted as unfinished, the renovation no record shows, the wrong room count. In Homeowner HQ those corrections go to your own agent, the record is attached to your realtor only, and your monthly update is rebuilt on the real home. That is the difference between a generic estimate and yours: same method, honest inputs, and a person who knows the street reading it with you.
An estimate — Homeowner HQ's included — is not an appraisal, and it is not a price. When a lender is involved, the number that counts is a licensed appraiser's formal opinion, ordered for that transaction. Use the monthly estimate for what it is good at: tracking your value and equity over time, timing your own decisions, and starting the conversation with your agent from real numbers instead of a guess.
A Homeowner HQ estimate is not an appraisal.
Your own agent sends a monthly value update from Homeowner HQ — the estimate, labeled as an estimate, with your equity beside it — and HQ runs on Amazon AWS. Realtors and lenders use the same HQ together: homeowners stay connected to their own agent, and the monthly trend is the honest way to watch what is moving the number.
Homeowners are always free. Realtors pay $25/mo to join and lenders join at the $5/mo founding rate, at any book size, with no setup fee; sending messages inside HQ is a $100/mo unlock ($125/mo total for realtors, $105/mo total for lenders). A lender-sponsored realtor joins for $0.
Homeowner HQ is an AI-powered marketing department for agents and lenders — a relationship and revenue engine, not a homeowner database. A homeowner's record routes them back to their own agent; it is never sold and never shown to lenders.