Is Your Home Overassessed?
We compare your property to similar homes nearby using the same methodology tax boards use. See your gap in 60 seconds — only pay if our data shows one.
Check Your Property
See how your assessment compares to neighbors in 60 seconds.
Not sure about the rules in your state?
NJ Reval Town Deadline Open
May 1, 2026
May 1 — revaluation towns (26 municipalities)
Standard April 1 deadline has passed
53%
Of NJ residential tax appeals result in a reduction — NJ Judiciary data
$49 Flat
Full comparable evidence packet — no attorney fees, no contingency
The Product
Property Assessment Audit Report
A systematic analysis of your property assessment against public records, comparable sales data, and state-mandated ratio methodology.
PropGap Assessment Audit Report
4-page PDF · Instant delivery · NJ & TX
$49
flat fee · one-time
Comparable Sales Report
Up to 10 nearby sales from public records — addresses, sale prices, and specs. Print as Exhibit A.
Chapter 123 Ratio Audit
NJ Common Level Range analysis — shows exactly whether your assessment is outside the legal band.
Factual Error Checklist
Step-by-step guide to compare your property specs against the assessor's official record (the "Blue Card").
Homeowner's Playbook
4-step guide: factual audit → evidence review → the CLR math → filing checklist with certified mail instructions.
Only pay if our data shows a gap and you want the full Evidence Kit. If your assessment looks fair, we'll tell you.
No subscription. No attorney fees. No contingency. Data only — you decide what to do with it.
The Numbers Don't Lie
Data sourced from the NJ Tax Court and Texas Comptroller PTAD. Most homeowners never know they can appeal.
Of filed NJ residential appeals resulted in a reduction (NJ Judiciary, 2022). Outcome depends on your assessment, comps quality, and County Board decision — PropGap does not guarantee a result.
Of TX appraisal protests resolved result in a lower value — PTAD data
Typical annual savings when an appeal succeeds — varies by home value, tax rate, and % reduction. Not a guarantee.
NJ municipalities undergoing full 2026 revaluation — extended May 1 deadline
How PropGap Works
Professional comparable analysis in three simple steps.
Enter Your Address
We pull available data for your property and find up to 20 comparable properties with recent sale prices in your area.
See the Comparison
You review the data and see comparable properties with recent sale prices in your neighborhood — the evidence a Board of Taxation actually uses.
Get Your Data Report
Download an Assessment Health Report with comparable analysis and filing reference data.
Assessment Health Report: $49 flat fee · No attorney. No percentages. You keep 100% of your savings.
News & Research
Understand the landscape of property assessment and homeowner rights.
NJ Tax Court: Your Right to Appeal
The NJ Tax Court handles over 100,000 assessment appeals per year. About 53% of filed appeals result in a reduction (est. NJ Judiciary Annual Report, 2022) — but only if you file before the deadline.
Official NJ Tax Court siteTexas Property Tax: How to Protest Your Appraisal
Every Texas property owner has the right to protest their appraised value. The May 15 deadline is firm — comparable evidence is your strongest argument.
Texas Comptroller guideFor Real Estate Agents
Give Every Buyer & Seller a Tax Reality Check
Run a 30-second assessment check on any listing. If the property is over-assessed, share the analysis link directly with your client — it builds trust and gives them a concrete next step. No subscription required.
- Check a property before making an offer — know the real tax exposure
- Send a read-only analysis link to your client in one click
- Differentiate yourself: most agents never discuss over-assessments
$49 if gap found · free if assessment is fair