Coming soon · Built for iPhone
Lower your property tax bill.
PROppeal’s Evidence Engine analyzes your assessment against licensed comparable sales, applies your state’s rules, and gives you a straight verdict — then builds the board-ready letter you file yourself. No consultant taking a cut of your savings.
$29.99 one appeal — analysis and the letter
No percentage of your savings, ever — a consultant would take 30–50% of your first year.
An honest verdict — we’ll tell you if it’s not worth filing.
Three ways to do this
The same appeal, three very different bills.
Every route below can win. They differ in what they cost you, who does the work, and whether anyone has a reason to tell you not to file.
On your own
Free · your time
Free in money. You are the researcher, the appraiser and the filer.
- ✓You keep everything you save
- ✓You file it, in your own name
- −Listing-site estimates aren’t comparable sales
- −Sizing comps to your home is a convention you have to know
- −Most states convert through a county ratio first
- −Nothing tells you the board can raise your assessment
With PROppeal
$29.99 · once
One appeal — the verdict and the letter. No subscription, no cut.
- ✓You keep everything you save
- ✓You file it, in your own name
- ✓Licensed sales, screened for type, distance and recency
- ✓Every adjustment shown, so the board can check the math
- ✓Your county’s ratio, deadline, form and board — by name
- !We tell you when not to file — before you build a case
Hiring it out
30–50% · of your savings
Charged on what you save, and charged again next year.
- −You keep half to two-thirds of what you save
- ✓They file on your behalf
- ✓Professional evidence and representation
- −The fee returns every year the appeal does
- −You don’t see the packet before it’s filed
- −Paid only when you file and win, so “don’t file” earns nothing
On a $500-a-year saving, a 30% contingency costs about $150 — and again every year it applies. PROppeal is $29.99, once.
Why waiting costs you
An over-assessment compounds. Against you.
Too high a number this year isn’t a one-off. It becomes the base your county bills from, and next year’s increase is applied on top of it. Wait, and you don’t just pay the error again — you pay a bigger version of it. An appeal resets the base and stops the meter.
$500 / yr
2.1 % / yr
The rate starts at the national average and both are yours to change. What you’re overpaying, and how fast your own county moves, are two of the things PROppeal works out for your actual property.
The rate above starts at 2.1%, the change in U.S. house prices in the year to Q2 2026 (FHFA House Price Index, published 25 August 2026). That measures market prices, not assessments — assessments follow the market on a lag that differs by state, which is why it is a starting point and not a forecast. The bars also assume the error rides along with your county’s increases and your tax rate holds. Rates are set by your school district and municipality, not your assessor, so they move on their own. How long an error persists is a state question too — some states redraw every value annually, others sit on a frozen base year for decades. Pick your state below and PROppeal will tell you which one you’re in.
What you actually get
A verdict first. Then the letter.
Most tools sell you a document. PROppeal answers the question first — is your assessment actually beatable? — and then helps build the thing you file.
- 01The verdictHow strong your case is, what it rests on, and how much of the gap the comparable sales actually support.
- 02The letterAddressed to your board by name — Board of Assessment Appeals, Board of Revision of Taxes, Board of Equalization — because it differs by county, not just by state.
- 03Exhibit AThe comparable-sales grid your letter cites, so the board can check every number the argument rests on.
- 04Exhibit BYour own photos, captioned and attached as supporting documents — the roof, the foundation, the drainage, whatever the county’s files don’t show.
- 05Your guide to followWhat your state calls the filing, who it actually goes to, and your own county’s deadline — not the statewide date, because plenty of counties keep a calendar of their own. It also tells you plainly whether the board in your state can raise your assessment, not only lower it, and you see that before you pay.
An actual PROppeal appeal, start to finish — the argument, the size-adjustment workings, and the photographs. The owner, property, parcel and comparable sales are fictional and the photographs are illustrative; the document is the real thing. Open the full PDF →
The Evidence Engine
How PROppeal builds your case
Every appeal runs through the same five steps — licensed data in, a board-ready filing out.
Where we stand
Credibility is the product.
You’ll always know where you stand. Some assessments are worth challenging and some aren’t — and when yours isn’t, we’ll tell you plainly and early. PROppeal is a knowledgeable guide: we show you the comparable sales, explain what they mean in your county, and let the facts make your case.
- You stay in control. You file with your county yourself, in your own name. We build the case and hand it to you; every call is yours. That makes us your guide, not your agent or representative.
- Evidence you can read yourself. Real comparable sales, explained in plain language, so you can see exactly what your case rests on. That’s evidence — not tax, legal, or appraisal advice, and comps aren’t a certified appraisal.
- Straight about outcomes. What you save depends on your county and your evidence. We show you the numbers your case rests on, and we don’t guarantee a savings figure.
FAQ
Questions, answered plainly
Do you file the appeal for me?
PROppeal builds the letter and evidence summary for you — but you’re the one who files it with your county. We’re the tool that builds your case, not an agent or representative acting on your behalf.
Is this tax or legal advice?
PROppeal organizes comparable sales and your evidence into a clear, board-ready letter — but it’s not tax, legal, or appraisal advice, and the comps it generates aren’t a certified appraisal. Think of them as strong supporting evidence, not the final word.
Will I definitely save money?
Every case is different, so we can’t promise a specific outcome — it depends on your county and the strength of your evidence. And if your assessment already looks fair, we’ll tell you that too. Being straight with you about your odds is part of the deal.
Where does the comp data come from?
Licensed property-data providers — the recorded sales our Evidence Engine runs on. We favor recent, nearby sales, filter out distressed ones, and cite independent valuations when they support your case. It’s still worth double-checking the details before you file.
What does it cost?
$29.99 for one appeal — it covers the whole thing: the data-backed analysis of your assessment and the board-ready appeal letter. You decide whether to file the letter with your county, but either way it’s included. You’re paying for a straight answer and the work behind it, not a percentage of your savings — and if the analysis says you don’t have a strong case, we’ll tell you. That honest answer is part of what you paid for, and it’s the same price either way.
What do I need to run it?
An iPhone — PROppeal is built for iPhone first, with iPad support to follow. The app is launching soon; when it’s live you’ll download it from the App Store, add your property, and check your case in a few minutes.
What kinds of property does PROppeal support?
To start, PROppeal works with single-family homes, twin and semi-detached homes, townhomes, and condominiums. We’re not yet set up for multi-family rental buildings, commercial property, or manufactured and mobile homes — those may come later. If your home is one of the four we cover and it’s in a supported state, you’re good to go.
Coverage
Find your state.
Property tax law is state law, so “supported” has to mean something specific: PROppeal has that state’s assessment ratio, its board’s authority to raise, its filing deadline, and the right body to address the letter to — each one cited to a primary source, not a national average. Pick your state and see exactly where it stands.
Coming soon states are being finished — you can still explore the app there, and we’ll let you know before any paid analysis runs in a state we’re still tuning.
Be ready before your deadline.
PROppeal is launching soon — a data-backed analysis of your assessment, then the letter to file, with an honest verdict either way.
$29.99 one appeal — analysis and the letter
One price, whatever the answer.
Want a heads-up when we launch? Email [email protected].