Sullivan County, NH Property Taxes (2026)

Sullivan County owners pay a median of $5,616 a year on a median home value of $236,300, an effective rate of 2.38%. That's the 1st-highest rate of 10 New Hampshire counties with Census data, above the New Hampshire county median of 1.93%.

Updated October 2026 · Data: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023)

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Effective tax rate

2.38%

1st highest of 10 in NH

Median annual bill

$5,616

~$468/month

Median home value

$236,300

New Hampshire county median

1.93%

Effective rate

What a protest could save you in Sullivan County

Enter the market value from your appraisal notice. We apply Sullivan County's 2.38% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$5,624
Savings at 10–15% off
$562–$844
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Sullivan County vs. New Hampshire vs. U.S. property tax rates

Sullivan County2.38%
New Hampshire county median1.93%
U.S. county median0.84%

Key stat: Sullivan County's effective property tax rate is 2.38%, vs. 1.93% for the median New Hampshire county and 0.84% for the median U.S. county. It ranks 1st of 10 in New Hampshire. Effective rate = median tax bill ÷ median home value, so it already reflects typical exemptions. (Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023))

How to appeal your property taxes in Sullivan County

  1. 1

    Review your assessment notice

    Check the assessed value from the Sullivan Town Assessor. Compare it to recent sales of similar homes nearby.

  2. 2

    File your appeal before the deadline

    The Sullivan County deadline is March 1 or September 1. Missing it means waiting until the next assessment year.

  3. 3

    Gather evidence

    Recent comparable sales, photos of condition issues, repair estimates or an independent appraisal.

  4. 4

    Present your case

    Submit evidence or attend a hearing with the Town Assessor.

  5. 5

    Get your decision

    If you win, your assessed value and bill go down. On a $5,616 bill, 10–15% off is $562–$842 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

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Property tax exemptions in New Hampshire

New Hampshire homeowners may qualify for exemptions that reduce taxable value. Check with the Sullivan Town Assessor for amounts.

Homestead exemption

For your primary residence. Reduces the value used to calculate your bill.

Senior / over-65

Many states add an exemption or freeze for owners 65 and older.

Disability

For homeowners with qualifying disabilities, often similar to the over-65 benefit.

Veterans

Disabled veterans may get partial or full exemptions depending on rating.

Frequently Asked Questions

What is the property tax rate in Sullivan County, New Hampshire?
The median effective property tax rate in Sullivan County is 2.38%: a median annual bill of $5,616 on a median home value of $236,300. That's the 1st-highest rate of 10 New Hampshire counties with Census data. Your own rate depends on which city, school district and special districts you're in. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023).
How much are property taxes in Sullivan County?
The median Sullivan County property tax bill is $5,616 a year, about $468 a month, compared with a New Hampshire county median of $5,796.
What is the deadline to appeal property taxes in Sullivan County?
The deadline to appeal in Sullivan County is March 1 or September 1. Missing it means waiting until the next assessment cycle.
Is Sullivan County a high property tax area?
Sullivan County's 2.38% effective rate is above the New Hampshire county median of 1.93% and above the U.S. county median of 0.84%. That's the 1st-highest rate of 10 New Hampshire counties with Census data.
Can TaxDrop help lower my Sullivan County property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

Merrimack County

Rate: 2.00%

Median bill: $6,617

Cheshire County

Rate: 2.32%

Median bill: $5,968

Hillsborough County

Rate: 1.76%

Median bill: $6,791

Belknap County

Rate: 1.44%

Median bill: $4,897

Grafton County

Rate: 1.88%

Median bill: $5,624

Strafford County

Rate: 1.98%

Median bill: $6,582

Carroll County

Rate: 1.06%

Median bill: $3,685

Rockingham County

Rate: 1.63%

Median bill: $7,512

← All 10 New Hampshire counties

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