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Single Family ResidenceResidential
$646,173$389 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 85How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $616,000 on Jun 27, 2025

21 OLD FORT LN

DUNBARTON, NH 03046
3
Beds
3.5
Baths
1,663 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
2.5 ac
Lot SizeThe size of the land the home sits on, from county records.
1992
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$646K
$550K low$743K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$616,000 · Jun 27, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,369 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$573,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$148,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$424,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$301,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$410,400

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.40
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
27
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
56
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
91
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
25
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyMERRIMACK
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2007
Lot (acres)The size of the land the home sits on, from county records.2.50
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

Transaction History(2)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Dunbarton Elementary SchoolC
Elementary · Grades KG–6 · 3.6 mi
H
Bow High SchoolA
High · Grades 9–12 · 4.4 mi
M
Bow Memorial SchoolB
Middle · Grades 7–8 · 4.9 mi

District: Bow School District

Neighborhood · ZIP 03046These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.56
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.98

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.3,248
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.103 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$138,778
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$150,568
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.44 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

21 Old Fort Ln measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth more than 79% of homes in Merrimack County
  • Costs more per square foot than 91% of homes in Merrimack County
  • Smaller than 67% of homes in Dunbarton 03046
  • Has a smaller lot than 74% of homes in Dunbarton 03046
  • Newer than 70% of homes in Merrimack County

What homes are worth in Dunbarton 03046

Each bar is how many homes fall in that price range. The marker is this home.

This home
$282K$1.1M

This home is worth more than 53% of homes in Dunbarton 03046.

How it measures up in Dunbarton 03046

The dot is this home. The mark in the middle is the typical home in Dunbarton 03046.

Estimated value$646,173
CheaperTypical $635,900Pricier

Pricier than 53% of homes nearby

Price per ft²$389
CheaperTypical $325Pricier

Pricier than 82% of homes nearby

Living area1,663 ft²
SmallerTypical 1,996 ft²Bigger

Bigger than 33% of homes nearby

Lot size2.5 ac
SmallerTypical 5.05 acBigger

Bigger than 26% of homes nearby

Year built1992
OlderTypical 1990Newer

Newer than 53% of homes nearby

How 21 Old Fort Ln ranks against every home in each area.
MeasureThis homeDunbarton 03046Merrimack County
Estimated valuepricier than$646,17353% of homes79% of homes
Price per ft²pricier than$38982% of homes91% of homes
Living areabigger than1,663 ft²33% of homes45% of homes
Lot sizebigger than2.5 ac26% of homes67% of homes
Year builtnewer than199253% of homes70% of homes

About 21 Old Fort Ln

How much is 21 Old Fort Ln, Dunbarton, NH worth?

The TopHap Estimate for 21 Old Fort Ln, Dunbarton, NH is $646,173 as of Aug 30, 2026. The likely range is $549,542 to $742,804. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Old Fort Ln, Dunbarton, NH last sell?

21 Old Fort Ln, Dunbarton, NH last sold on Jun 27, 2025 for $616,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 Old Fort Ln, Dunbarton, NH?

21 Old Fort Ln, Dunbarton, NH has 3 bedrooms, 3.5 bathrooms, 1,663 square feet of living space and a 2.50-acre lot.

When was 21 Old Fort Ln, Dunbarton, NH built?

21 Old Fort Ln, Dunbarton, NH was built in 1992, making it 34 years old. It is a ranch home. The building has 1 story.

What schools serve 21 Old Fort Ln, Dunbarton, NH?

21 Old Fort Ln, Dunbarton, NH is assigned to Dunbarton Elementary School (elementary), rated C; Bow High School (high), rated A; Bow Memorial School (middle), rated B. All sit in Bow School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Old Fort Ln, Dunbarton, NH compare to other homes in Dunbarton 03046?

Among the 1,184 homes in Dunbarton 03046, it is worth more than 53% of them ($646,173 against a typical $635,900), its price per square foot is higher than 82% of them ($389 against a typical $325), it is bigger than 33% of them (1,663 ft² against a typical 1,996 ft²), its lot is bigger than 26% of them (2.5 ac against a typical 5.05 ac) and it is newer than 53% of them (1992 against a typical 1990). Measured against all of Merrimack County, it is worth more than 79% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 21 Old Fort Ln, Dunbarton, NH?

The 2025 property tax bill for 21 Old Fort Ln, Dunbarton, NH was $9,369. The county assessed it at $573,400.

More homes on Old Fort Ln

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