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.
Launch pricing
An honest verdict — we’ll tell you if it’s not worth filing.
Why most homeowners overpay
Assessments are often stale or too high — and the usual fix takes a cut of your savings. PROppeal doesn’t.
Source: National Taxpayers Union Foundation, "Are You Paying Too Much in Taxes?"
The Evidence Engine
How PROppeal builds your case
Every appeal runs through the same five steps — licensed data in, a board-ready filing out.
Credibility is the product.
Not every assessment is worth fighting — and we’ll tell you when it isn’t. PROppeal is a knowledgeable guide, not a salesperson and not a lawyer. We show you the comparable sales, explain what they mean, and let the facts make the case.
- You file it yourself — we’re not your agent or representative.
- Not tax, legal, or appraisal advice. Comps aren’t a certified appraisal.
- No savings guarantee — outcomes depend on your county and your evidence.
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?
One price, shown in the app before you buy — and 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.
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, townhomes, and condominiums. We’re not yet set up for multi-family buildings, commercial or rental property, vacant land, or other property types — those may come later. If your home is one of the three we cover and it’s in a supported state, you’re good to go.
Coverage
Check if we support your state
PROppeal's comps, valuation math, and letter engine are fully tuned to your state's assessment rules. We're actively rolling out full support state by state — search yours below.
- AlabamaComing soon
- AlaskaComing soon
- ArizonaComing soon
- ArkansasComing soon
- CaliforniaComing soon
- ColoradoComing soon
- ConnecticutComing soon
- DelawareComing soon
- District of ColumbiaComing soon
- FloridaComing soon
- GeorgiaComing soon
- HawaiiComing soon
- IdahoComing soon
- IllinoisComing soon
- IndianaComing soon
- IowaComing soon
- KansasComing soon
- KentuckyComing soon
- LouisianaComing soon
- MaineComing soon
- MarylandComing soon
- MassachusettsComing soon
- MichiganComing soon
- MinnesotaComing soon
- MississippiComing soon
- MissouriComing soon
- MontanaComing soon
- NebraskaComing soon
- NevadaComing soon
- New HampshireComing soon
- New JerseyComing soon
- New MexicoComing soon
- New YorkComing soon
- North CarolinaComing soon
- North DakotaComing soon
- OhioComing soon
- OklahomaComing soon
- OregonComing soon
- PennsylvaniaComing soon
- Rhode IslandComing soon
- South CarolinaComing soon
- South DakotaComing soon
- TennesseeComing soon
- TexasComing soon
- UtahComing soon
- VermontComing soon
- VirginiaComing soon
- WashingtonComing soon
- West VirginiaComing soon
- WisconsinComing soon
- WyomingComing soon
No states match your search. Try a different name or abbreviation.
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.
Launch pricing
Want a heads-up when we launch? Email [email protected].