Web app · Finance
Lower
Appeal your property tax assessment yourself — and keep every dollar
Enter the assessed value from your notice, build a comparable-sales worksheet, log the defects that hurt your value, and Lower generates a state-specific appeal letter for CA, TX, NY, FL, IL or anywhere else. Free, no contingency cut.
Stored in your browser only. Nothing you do in the web version is sent to our servers. Clear your browser data and it's gone — so export a backup from the in-app menu if you want to keep it.
In your browser
What you can do in Lower on the web
Over-assessment calculator
Assessed value against your fair market value gives the over-assessment percentage, the annual tax overpayment at your mill rate, and the three-year projection — the hero number on every case.
Comparable sales worksheet
Add nearby recent sales with price, square footage, beds, baths and distance; Lower computes each one's price per square foot and a recency- and size-weighted fair market value you can adopt in one tap.
Evidence exhibits
Record roof wear, foundation cracks, water damage, a dated kitchen or drainage problems against the app's ten categories — each becomes a numbered exhibit in the appeal letter.
State-specific appeal letter
The real bundled templates: California's BOE-305-AH, Texas's Form 50-132, New York's RP-524, Florida's DR-486 and Illinois's BOR complaint, each with its statutory closing, addressed to the right board and filled with your numbers, comparables and exhibits.
Deadline timeline
Set the filing deadline and hearing date and Lower lays out the T-30, T-7 and T-1 milestones alongside your state's filing window and procedural notes.
Resources for all six jurisdictions
The full state library — board, form, filing window, typical reduction range, a primer and the procedural notes for California, Texas, New York, Florida, Illinois and a general-purpose fallback.
Screens
Every screen, rebuilt for the browser
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1
Cases
Total annual tax you're on track to recover, deadline warnings, and a document card per property with assessed value, your FMV and annual savings.
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Case detail
The savings hero, an assessed-vs-your-value comparison, filing countdown, property record, weighted comparable suggestion and the four tools that build the appeal.
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Case editor
Address, parcel, state, county, tax year, assessed value, your FMV, mill rate, home size and the statement of grounds — with the savings recalculated as you type.
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Comparable sales
Every comparable with its price per square foot, the weighted fair market value, a $/sq ft bar chart, and one tap to adopt the weighted figure.
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Evidence exhibits
Numbered, captioned exhibits across the app's ten defect categories, ready to be listed in the letter.
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Timeline
Filing deadline and hearing date with the T-30 / T-7 / T-1 milestones and what your state's board expects.
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Appeal letter
The generated letter with your comparables and exhibits written in, a readiness check, and copy or download.
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Resources
Board, form, filing window, typical reduction and a full primer for each of the six bundled jurisdictions, plus the maths Lower uses.
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Settings
Default state, your name on letters, portfolio totals, plus comparables CSV, backup, sample data and erase.
Try it with sample data: Loads three real-shaped cases — a Pasadena house, an Austin rental and an inherited Chicago bungalow — with seven comparable sales, seven captioned exhibits, filing deadlines and hearing dates already set. You can start fresh at any time.
Ready? It's free.
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Questions
Is the web version of Lower free?+
Yes. Sign in with a free All Things AI account and use every screen — no subscription, no in-app purchases.
Where is my data stored?+
Only in this browser's local storage. Nothing you enter is sent to our servers, so we can't see it, back it up, or restore it. Clearing site data, a private window, or another device starts empty. Export a backup from the in-app menu to keep it.
Do I need an account?+
You can read about the app without one, but you must sign in to open it. Sign-in is free and takes a few seconds with Google.
How is the web version different from the Lower iPhone app?+
The iPhone app scans your assessment notice with on-device Vision OCR; on the web you type the assessed value, parcel ID and deadline in yourself. Evidence exhibits are captions and categories only — the iPhone app attaches the photo to each exhibit and embeds it in the PDF. The appeal packet downloads as a formatted text file you can paste into a document; the iPhone app renders a print-ready PDF via PDFKit. Deadline reminders are shown as milestones on the timeline rather than fired as notifications, because a browser tab cannot schedule an alert weeks out. Lower is a workbench, not legal or tax advice — confirm your county's form and deadline before filing.