Short answer: when a mortgage is involved, the lender orders an appraisal from a state-licensed or certified appraiser who has no stake in the deal. The appraiser visits the home, records its facts and condition, and then values it against recent closed sales of similar homes nearby. The result — one supported opinion of value — is the number the lender actually lends against, which is why this page exists alongside the estimate and CMA guides in this series: three different numbers, made three different ways, for three different jobs.
The lender orders the appraisal, usually through an appraisal management company, and the borrower typically pays for it as part of the loan's costs; the fee varies by market and by the complexity of the home. Federal and lender rules keep the process at arm's length: the loan officer, the agents and the homeowner do not choose the appraiser and may not pressure for a value. That independence is not bureaucracy — it is what lets a lender trust the number, and it is why a homeowner's own estimate, however careful, can never substitute for it in a loan file. A cash buyer can order an appraisal too, and some do, but no lender requires one where no loan exists.
The appointment is usually under an hour. The appraiser measures the home, confirms the layout and room count, photographs every room and the exterior, and notes the condition of the roof, systems and finishes, updates and remodels, and anything touching health, safety or soundness; FHA and VA appraisals apply their programs' property standards as well. You help by making access easy and handing over facts: a written list of updates with dates and costs, permits if you have them, and anything about the home that a walk-through cannot show. The appraiser decides what each fact is worth — but a fact the appraiser never learns cannot be counted, and a recent update documented with a date counts for more than the same update described from memory.
Most home appraisals rest on the sales comparison approach: the appraiser selects recent closed sales of similar homes near yours — pending listings and asking prices are context, not the basis — and adjusts each comparable up or down for differences in size, condition, features, lot and timing, so every comparable is priced as if it were your home. The adjusted values form a range, and the appraiser reconciles them into the final opinion, weighting the sales that needed the least adjustment and are most recent and closest. This is why two honest appraisals can differ modestly, and why the facts matter so much: the same wrong living area or missed remodel flows straight into the adjustments.
If the value supports the price or the loan amount, the file moves on and most homeowners never think about the report again. If it comes in low, the lender still lends against the appraised value, so the gap is closed another way — more cash from the buyer or borrower, a renegotiated price, a split, or the deal ending under its contingencies; on a purchase, government-backed loans carry their own rules, including the FHA/VA amendatory clause a buyer cannot be forced to waive. The one remedy aimed at the appraisal itself is a reconsideration of value through the lender, and it works on facts only: a factual error in the report, a missed update, or a stronger closed comparable the appraiser did not use. Keep the report either way — it is a professional read of your home's facts, and any error in it is worth correcting in your own records too.
A Homeowner HQ estimate is not an appraisal. The value and equity tracked in HQ are the preparation — they show you the trend your agent is watching and the facts worth correcting before any appraiser visits — but the lender's own appraisal sets the value in the loan decision, and the lender's underwriting decides the amount you are actually offered.
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. When a sale, a refinance or equity borrowing is on the table, that tracked value-and-equity line — and the corrected facts behind it — is the starting point you and your agent bring to the lender conversation.
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.