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New Hampshire has some of the highest property tax bills in America and a clean disproportionality argument.
The law and the data both work here. No income tax and no sales tax means property tax carries everything, so rates are among the nation's highest and the dollars at stake per win are large. Disproportionality arguments run off the state's own published equalization ratios. The only drawback is that the state has 1.4 million people.
So New Hampshire gives you a ground that runs on published assessed values rather than on sale prices. You're not showing what your house would sell for. You're showing that homes genuinely like yours are assessed lower than yours is, using numbers the county already publishes.
Now that matters more than it sounds, because it means a state keeping sale prices private doesn't stop you. Illinois, Texas, New York, New Jersey, Pennsylvania, New Hampshire, Kansas, Massachusetts and DC all have some version of it, and honestly it's usually the stronger argument even where sale prices are public.
Deadlines here are set locally rather than by one statewide date, so the one that binds you is printed on your own assessment notice.
And that notice is really the thing to go find today, honestly. It's what starts your clock, it's usually a much shorter window than people expect, and there's no getting it back once it's gone.
First, look up your own record. Your town's assessing office sets your value. Towns don't all assess at full market value, so look up your town's equalization ratio, which the state publishes each year. Divide your assessment by it and you've got the market value the town's really claiming.
Next, know where to file. You apply for an abatement in writing to your town's selectmen or assessors by March 1 after your final tax bill. They've got until July 1 to decide, and no answer counts as a no. After that you can appeal to the state Board of Tax and Land Appeals or to Superior Court by September 1, but you can't do both.
Then bring the evidence that wins here. You need specific reasons, like a factual mistake on your record or proof that your home's assessed at a higher share of its value than similar homes in town. Honestly, being unhappy with your taxes isn't enough on its own. New Hampshire's property taxes are among the highest in the country, so a real win's worth a lot here.
Also, check your exemptions. Ask your town about the elderly exemption, and the credits for veterans and disabled homeowners. The amounts are set town by town, and you usually apply by April 15.
We only turn a state on once we've read its appeal rules and its actual board decisions, because that's how we make sure what we tell you is right and not generic. It takes a few days per state, and honestly it's the reason our answers are worth anything.
In the meantime our free check runs in parts of Illinois, Washington, Ohio, Georgia, Colorado, North Carolina and Oregon, and in every town in New Jersey. If you leave your email on the check page, we'll write to you the day New Hampshire goes live, and we won't email you before that.
We've screened all fifty states and DC on the same two questions. Does winning a lower market value actually lower your bill, or is there a cap sitting in between? And can you even put the evidence together from public records?
This comes from our own fifty-state screen, where we checked each state's cap, whether sale prices are public, whether there's an argument based on assessed values, and how many appeals actually get filed. Where we've quoted an appeal count, it's from the state or county that published it. If you spot an error, please write to hello@propertytaxbuddy.com and we'll correct it and say what changed.