Grantham, Sullivan County, New Hampshire Property Taxes
Median Grantham, NH effective property tax rate: 1.82%, significantly higher than the national median of 1.02%, but lower than the New Hampshire state median of 1.91%.
Median Grantham, NH home value: $365,400
Median annual Grantham, NH tax bill: $6,485, $4,085 higher than the national median property tax bill of $2,400.
How are property taxes in Sullivan County calculated?
Property taxes in Grantham, NH are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Grantham’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Grantham, knowing local tax details benefits homeowners and investors.
Last Updated March 1, 2025
Grantham, Sullivan County, New Hampshire Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.82%
Estimate Property Tax Bill
$6,650
$6,171
Property Tax Rates Across Grantham, Sullivan County, New Hampshire
Local government entities are responsible for setting tax rates, and these can differ significantly within a state. This variation arises because each county annually estimates its budgetary needs to fund services and then divides this by the total value of all taxable property within its area, resulting in the property tax rate. Although votes and legislation play a role in shaping tax rates and budgets, this summarization captures the core of the yearly process.
In Grantham, located in Sullivan County, New Hampshire, the effective property tax rate is 1.82%, which is higher than the national median of 1.02%. This rate is consistent with the highest and lowest median tax rates in the area, both recorded at 1.82% within the zip code 03753. When comparing Grantham's property tax rate to the national median property tax bill of $2,400, it becomes evident that property taxes here are relatively high. Understanding these rates is crucial for property owners considering tax appeals or exemptions, as they directly impact the overall cost of property ownership.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Grantham Tax Rate
1.82%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Sullivan County Tax Rate
2.36%
Median Effective New Hampshire Tax Rate
1.91%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Grantham, Sullivan County, New Hampshire
Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
03753 | 1.64% | 1.64% | 1.82% | 1.82% | 1.82% |
Source: Ownwell
Property Tax Assessment Values Across Grantham, Sullivan County, New Hampshire
When examining property taxes in Grantham, NH, understanding the distinction between "market value" and "assessed value" is crucial. The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Sullivan County appraisal district estimates the market value for tax purposes. The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
In Sullivan County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of April. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Grantham.
For example, the median home price in Grantham is $365,400, with tax bills ranging significantly across the county. The zip code 03753 has the highest median home price at $365,400.
Property Tax Assessment Values Across Grantham, Sullivan County, New Hampshire
Source: Ownwell

$53,778
$228,739
$403,700
Median Grantham Market Value
$365,400
Median Sullivan County Market Value
$185,800
Median New Hampshire Market Value
$299,765
Median United States Market Value
$235,294
Property Tax Assessment Values Across Grantham, Sullivan County, New Hampshire
Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
03753 | $244,000 | $294,900 | $365,400 | $463,912 | $586,100 |
Source: Ownwell
Property Tax Bills Across Grantham, Sullivan County, New Hampshire
Median Grantham Tax Bill
$6,485
Median Sullivan County Tax Bill
$4,808
Median New Hampshire Tax Bill
$5,895
Median United States Tax Bill
$2,400
Property Tax Bills Across Grantham, Sullivan County, New Hampshire
Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
03753 | $4,315 | $5,233 | $6,485 | $8,104 | $10,350 |
Source: Ownwell