NH Assessment Method Calculator

How to Use this Calculator

Choose a town.
Select building lot value.
Select building lot size.
Select total acres of parcel.
Optional "Structure Value" selection to compare developed parcel property taxes.

** Fine-tune assessment values by selecting a "Surplus" or "Excess" amount for all other acreage in the parcel (upper right hand corner). Average values are set but differ by location and land characteristics.

** Hover over the ? next to these selections to determine which to choose. Check tax cards to see what is standard in your town.

More info here: Understanding NH Property Taxes - Official NH Assessing Manual

Comparison of NH Valuation Methods For Tax Bill Assessments 2025 Tax Rate - Town Level

▸ Select One:

Surplus $/ac ?

Surplus Land — Acreage beyond the primary building site still considered developable. Assessors apply a reduced per-acre rate. Typically applies to land with road frontage or good access.

Excess Land — Land beyond economically useful development — remote, steep, wetland, or otherwise constrained acreage valued at a deep discount.

Select whichever category your assessor uses. These apply to Option A only.

Excess $/ac ?

Excess Land — Land beyond economically useful development — remote, steep, wetland, or otherwise constrained acreage. Valued at a deep discount compared to residual land.

Surplus Land — Back acreage still considered developable with some access or frontage. Valued at a higher rate than excess.

Select whichever category your assessor uses. These apply to Option A only.

Town

Building Lot Value ($)

Building Lot Size

Total Acres

Structure Value (optional)

Your results will appear here For most accurate results - make sure
Total Acres reflects actual parcel size.

StandardStandard Valuation (Market Value)

Current UseAll Acres in Current Use

HybridLot + Back Acres in Current Use

Total Parcel: — Acres

Total Assessed Value

$—

Total Parcel: — Acres

Total Assessed Value

$—

Total Parcel: — Acres

Total Assessed Value

$—

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Annual Tax Due

$—

Annual Tax Due

$—

Annual Tax Due

$—

— Assessor splits land —

Lot Value

Primary Building Lot

$—

Surplus Acreage

Additional Acreage

$—

Current Use Acreage

All Undeveloped Land

$—

Lot Value

Primary Building Lot

$—

Current Use Acreage

Undeveloped Land

$—