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Single Family ResidenceResidential
$853,956$220 / 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 92How 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

21 HEMLOCK ST

LONDONDERRY, NH 03053
6
Beds
3.5
Baths
3,881 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.
1.1 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$854K
$786K low$922K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,474 (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.$834,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$220,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$613,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$785,650

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.Colonial
CountyROCKINGHAM
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.1989
Lot (acres)The size of the land the home sits on, from county records.1.10
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.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(1)

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

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

E
South Elementary SchoolB+
Elementary · Grades 1–5 · 0.8 mi
H
Londonderry High SchoolA-
High · Grades 9–12 · 2.8 mi
M
Londonderry Middle SchoolC+
Middle · Grades 6–8 · 3.0 mi

District: Londonderry School District

Neighborhood · ZIP 03053These 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.9
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.89

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.26,296
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.649 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$123,095
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$143,902
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.45 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 Hemlock St 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 95% of homes in Londonderry 03053
  • Costs less per square foot than 96% of homes in Londonderry 03053
  • Among the largest homes in Londonderry 03053

What homes are worth in Londonderry 03053

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

This home
$216K$917K

This home is worth more than 95% of homes in Londonderry 03053.

How it measures up in Londonderry 03053

The dot is this home. The mark in the middle is the typical home in Londonderry 03053.

Estimated value$853,956
CheaperTypical $563,138Pricier

Pricier than 95% of homes nearby

Price per ft²$220
CheaperTypical $308Pricier

Pricier than 4% of homes nearby

Living area3,881 ft²
SmallerTypical 1,786 ft²Bigger

Bigger than almost all homes nearby

Lot size1.1 ac
SmallerTypical 1 acBigger

Bigger than 60% of homes nearby

Year built1987
OlderTypical 1985Newer

Newer than 61% of homes nearby

How 21 Hemlock St ranks against every home in each area.
MeasureThis homeLondonderry 03053Rockingham County
Estimated valuepricier than$853,95695% of homes81% of homes
Price per ft²pricier than$2204% of homes5% of homes
Living areabigger than3,881 ft²almost all homes95% of homes
Lot sizebigger than1.1 ac60% of homes57% of homes
Year builtnewer than198761% of homes59% of homes

About 21 Hemlock St

How much is 21 Hemlock St, Londonderry, NH worth?

The TopHap Estimate for 21 Hemlock St, Londonderry, NH is $853,956 as of Aug 30, 2026. The likely range is $785,985 to $921,927. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Hemlock St, Londonderry, NH last sell?

21 Hemlock St, Londonderry, NH last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Hemlock St, Londonderry, NH?

21 Hemlock St, Londonderry, NH has 6 bedrooms, 3.5 bathrooms, 3,881 square feet of living space and a 1.10-acre lot.

When was 21 Hemlock St, Londonderry, NH built?

21 Hemlock St, Londonderry, NH was built in 1987, making it 39 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Hemlock St, Londonderry, NH?

21 Hemlock St, Londonderry, NH is assigned to South Elementary School (elementary), rated B+; Londonderry High School (high), rated A-; Londonderry Middle School (middle), rated C+. All sit in Londonderry School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Hemlock St, Londonderry, NH compare to other homes in Londonderry 03053?

Among the 9,228 homes in Londonderry 03053, it is worth more than 95% of them ($853,956 against a typical $563,138), its price per square foot is higher than 4% of them ($220 against a typical $308), it is bigger than almost all of them (3,881 ft² against a typical 1,786 ft²), its lot is bigger than 60% of them (1.1 ac against a typical 1 ac) and it is newer than 61% of them (1987 against a typical 1985). Measured against all of Rockingham County, it is worth more than 81% 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 Hemlock St, Londonderry, NH?

The 2025 property tax bill for 21 Hemlock St, Londonderry, NH was $13,474. The county assessed it at $834,800.

More homes on Hemlock St

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