If you have opened your assessment notice and pasted it into ChatGPT, Claude, or Gemini, you did a sensible thing. A general AI is a good first reader for a confusing government letter. This post is about where that help runs out, and why the line sits where it does.
What a general AI does well
It reads the notice with you. Appraised value, assessed value, exemptions, the protest deadline, the hearing body with the unfamiliar name. An AI can explain each line in plain words, and it will not get tired of follow-up questions.
It explains the process. Informal review first, then a formal hearing, then what comes after. It can tell you what an appraisal review board is, what "evidence exchange" means, and roughly what a hearing feels like. Most of that is accurate for most places.
It drafts. A letter requesting an informal meeting. A short opening statement. A checklist for the day of the hearing. The prose is clean and the tone is right.
It gives you confidence. Many homeowners never appeal because the letter is intimidating. If an AI turns that letter into something you understand, it has already done real work. Use it for that, freely.
None of this is a knock on the tools. The next three sections are about something different: the hearing itself is an evidence proceeding, and an evidence proceeding has rules about where facts come from.
1. It has no custody of the facts
When you sit down at a hearing, the appraiser across the table has the county roll open. Every number they cite comes from a record you can both look at, with a date on it.
A general AI has none of that. It has no access to your county's assessment roll. It does not know what your neighbors' homes are assessed at this year. It cannot say when a figure was retrieved, because it never retrieved one. And it cannot show a method anyone could repeat, because the answer came from a language model, not from a query against a record.
That matters for a reason that has nothing to do with how smart the model is. In a hearing, a fact is only as useful as its source. "My AI said the house down the street is assessed lower" is not something a board can check. A printed roll record, with a parcel number and the date it was pulled, is.
This is the whole difference. FairPath pulls the county's published roll where it's available: your assessment and nearby homes', labeled with the retrieval date. The appraiser can check every line, and so can you.
2. It guesses your state's rules
Here is a real example of where a confident, plausible answer is wrong depending on your address.
The most natural argument a homeowner reaches for is this one: "The house next door is just like mine and it is assessed for less." Ask a general AI and it will usually tell you that is a strong argument. In some states it is. In others, the state's own appeal guidance says it is not a ground at all.
California. Homes carry a Proposition 13 base-year value set when they last changed ownership or finished new construction, so two similar homes are lawfully assessed on different bases. The State Board of Equalization's Publication 30, Residential Property Assessment Appeals, describes a regular appeal as a comparison of the enrolled value with current market value on the lien date. A neighbor's assessment is not a ground.
Oregon. The Department of Revenue's guide How to Appeal Your Property Value (150-303-668) says that comparing the tax-roll value of your house to a neighbor's, or the taxes you pay to a neighbor's, is generally not considered satisfactory evidence. Sales near January 1 and independent appraisal evidence carry the petition.
Illinois. The Department of Revenue's appeal guidance recognizes lack of uniformity as a basis for appeal: the property is assessed at a higher level than comparable properties.
Texas. The Comptroller lists unequal appraisal among the grounds a property owner may protest to the Appraisal Review Board: the property is appraised unequally compared with other properties.
Same argument, four states, two answers. A general AI cannot show you which one applies to your address, because it is not reading your state's publication when it answers. If you live in Portland or Sacramento, the state's own guide says that argument is not the one to build on.
FairPath checks the argument against the state's own publications and tells you, before you build on it, when an argument is not recognized where you live. The sources are the state's wording, linked, with the date we reviewed them.
3. It invents a comparable when it doesn't know one
Ask a general AI for three comparable sales near your address and it will give you three. They will have plausible addresses, plausible square footage, plausible prices. Some of them may not exist.
This is not a bug the next model version will fix. A language model produces the most plausible continuation of your question. If it does not know a comparable, the most plausible continuation is a comparable that looks right. You will not be able to tell which ones are real by reading them.
The appraiser can. They have the roll and the sales file open, and they check. A comparable that no one can find in the record is not evidence, whatever it looks like on the page.
FairPath shows only records that exist, and labels where each one came from: a county roll record with its identifier and retrieval date, a licensed data provider's sale record marked as such, or a sale you supplied yourself, marked as owner-provided and not independently verified. Those labels stay on the page so the appraiser can check each one against its source. If a record is not available for your property, the packet says so instead of filling the gap.
Bring your AI
So the honest position is not "don't use AI." It is: use it for the part it is good at.
Let it read the notice. Let it explain the process. Let it draft your letter and calm your nerves. Then, when it is time to put evidence in front of someone who has the county roll open, bring records that someone can check: your county's own data, the state's own rules, and comparables that exist.
That is what FairPath prepares. You review every fact, decide what to submit, and file it yourself. We do not predict what the board will do, and we do not file or appear for you. We put the county's records, with their sources and dates, in your hands.
Check your property free.
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