We took 73,771 real arm's length home sales across 302 New Jersey towns and ran every one of them through the state's own test. In the typical town, roughly a fifth of homes sit above the line where a county board is required to cut the assessment. Almost nobody actually goes and gets it.
Most states ask a board to weigh whether your assessment feels fair. Somebody argues, somebody else argues back, and a panel forms a view. New Jersey doesn't work that way. It runs a calculation, and the calculation is written into N.J.S.A. 54:3-22(c).
Here's the whole thing. Your town has a published ratio, called the Director's Ratio, which is roughly what assessments run as a percentage of what homes actually sell for. The state certifies a fresh one every October. The law then draws a range around it, 15 percent either side of the ratio itself. Divide your assessment by what your home is genuinely worth, and see where you land.
So above the top of the range, the board has to cut you. Inside it, nothing changes no matter how unfair the bill feels. Below the bottom, and that's the part almost nobody mentions, the board has to raise you.
And the statute says "it shall revise", so the board doesn't really get to weigh it up. Once your number is on the table the outcome is settled by where it falls, which means the interesting question usually isn't whether you have a good argument. It's basically whether you're over the line.
What that means in practice. You can work out the exact figure your home has to come in under, today, before you talk to anybody. Take your assessment and divide it by your town's upper limit. Come in below that number and a county board is required to act. Both inputs are published by the state, so honestly nobody's opinion comes into it.
Now, every recorded deed in New Jersey produces an SR-1A form from the municipal assessor, and the Division of Taxation publishes the lot. We pulled the 2025 file and the 2026 year-to-date file, kept only the sales the state itself marks usable, kept only class 2 residential, and ended up with 121,395 real transactions, with deeds running through June 30, 2026.
Then we took the 302 towns with at least 60 recent sales and worked out, for each one, what share of homes sit above the upper limit, below the lower limit, and comfortably inside.
| Where a home lands | Typical town | What the board does |
|---|---|---|
| Above the upper limit | 19.6% | Must reduce the assessment |
| Inside the range | 67.2% | Nothing changes |
| Below the lower limit | 13.3% | Must raise the assessment |
Roughly one home in five, in the town nearest the middle of our 302, is sitting above the line. Here's how it plays out in the ten towns with the most sales behind them.
| Town | Sales | Can win | Would be raised |
|---|---|---|---|
| Newark | 1,403 | 35% | 29% |
| Jersey City | 2,259 | 29% | 32% |
| Monroe Twp (Middlesex) | 1,006 | 28% | 35% |
| Cherry Hill | 1,086 | 23% | 12% |
| Hamilton Twp (Mercer) | 870 | 21% | 12% |
| Gloucester Twp | 979 | 20% | 15% |
| Berkeley Twp | 1,190 | 19% | 20% |
| Brick Twp | 1,245 | 18% | 18% |
| Mount Laurel | 819 | 17% | 11% |
| Toms River | 1,551 | 16% | 12% |
But a fifth of a town being over the line sounds a bit like an accusation, and it isn't one. We think it's actually close to unavoidable, and the reason is worth understanding, because it probably tells you something about your own house.
Pick any New Jersey town and look at what homes actually sold for as a share of their assessment. That number scatters, badly. In the typical town, the home at the 90th percentile has a ratio about 1.53 times the home at the 10th. Two houses assessed identically, sitting on the same street, will quite often sell months apart for prices that differ by a third.
Now hold that next to the legal range, which is only 15 percent either side. In 281 of our 302 towns, the everyday scatter in sale prices is wider than the range the law allows. That is 93 percent of them.
So when the spread of reality is wider than the box the statute draws, a real slice of every town ends up outside the box. That's not because anybody made a mistake. It's because an assessor has to set one value for a house that the market will happily price across a range. Newark is the sharpest case in our table, and Newark's assessor almost certainly isn't doing anything the others aren't.
Which is why this is worth checking rather than assuming. Nothing has to have gone wrong for you to have a case. The scatter on its own puts about a fifth of homes over the line, and your neighbor's identical house being assessed the same as yours isn't evidence that yours is right.
Look at that table again, at the right-hand column. In the typical town about 13 percent of homes sit below the lower limit, and in Monroe Township it's 35 percent.
Those owners are getting a pretty good deal, and if they file an appeal the statute directs the board to take it away. Same sentence, same law, pointing the other way. A county board that finds your ratio below the bottom of the range is told to revise your assessment upward.
New Jersey is the only state we cover where filing can leave you paying more. Elsewhere a weak appeal is really just a waste of a Tuesday. Here, if you're already assessed in your own favor and you open a file, the board is instructed to correct it against you. That isn't a scare story about something rare. It's what the statute says, and on our numbers it applies to roughly one home in eight.
Which is why we tell people no. Our free check works out both numbers, the figure you have to get under to win and the figure above which you'd be raised, and if you're on the wrong side of it we say so and sell you nothing.
New Jersey has the highest property tax bills in America, so the arithmetic here is quite a bit better than almost anywhere.
So take a real house we ran through our checker, 100 Valley Forge Rd in Cinnaminson, Burlington County. It's assessed at $267,500 and the tax bill is $10,189 a year, which is 3.81 percent of the assessment. Cinnaminson's official ratio is 55.13 percent, so the upper limit is 63.40 percent, so the number this owner has to beat is $421,924. Twelve recent sales of homes the assessor valued in the same bracket came in at a median of $408,500.
If the owner is right that their home is worth less than $421,924, the reduction is worth about $1,611 in the first year. The filing fee is $25.
Your petition has to be received by the deadline. Postmarked doesn't count, and that's probably the most common way a good case dies without anybody reading it.
For most of New Jersey the date is April 1.
But Burlington, Gloucester and Monmouth counties run a different calendar, and their deadline is January 15, two and a half months earlier than the date almost every guide on the internet quotes. That covers 117 municipalities. If you live in one of them and you're reading a national article about April, you're about to miss it.
And if your town revalues in a given year the deadline moves to May 1. In that year the Chapter 123 range doesn't apply at all, because a revaluation is supposed to put every assessment at full market value already, so the number to beat is simply your assessment.
You can do the arithmetic yourself. Find your assessment on your tax bill, find your town's ratio in the Division of Taxation's Chapter 123 table, multiply the ratio by 1.15, and divide your assessment by that. If your home would sell for less than the answer, you've got a case the law is obliged to hear.
Or put your address into our checker and we'll do it. We'll tell you the number you have to beat, show you what homes in your assessment bracket have actually been selling for with their square footage and year built, and say plainly if you're one of the people who should leave it alone. Most people who check get told no, and that's honestly the point of it.
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The sales are SR-1A records published by the New Jersey Division of Taxation, the 2025 annual file and the 2026 year-to-date file, downloaded August 4, 2026. We kept class 2 residential sales the state itself flags as usable, with a price over $50,000 and a recorded living area, which left 121,395 transactions. The measurements in this article use the 73,771 of those with 2025 or 2026 deeds, across the 302 municipalities with at least 60 such sales, excluding towns not on the Chapter 123 test.
Ratios are the Director's Ratios from the Table of Equalized Valuations, certified October 1, 2025 and amended by the Tax Court January 30, 2026, covering all 564 municipalities. To keep the comparison honest we measured each town against a range built from its own recent sales rather than against the older certified figure, because the two describe different periods and mixing them would have exaggerated the result in one direction.
That figure of 9,524 residential appeals filed in 2025 comes from the Division of Taxation's 2025 property tax appeals summary as reported in press coverage, alongside 15,717 appeals of all kinds and $2,061,916,644 in assessment reductions granted. We haven't read that summary directly, so we're attributing it rather than claiming it as our own.
Finally, the law is N.J.S.A. 54:3-22(c), which governs county boards of taxation. The Tax Court equivalent is N.J.S.A. 54:51A-6. Subsection (f) is what excludes revaluation years.