Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$531,901$324 / 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 95How 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 $215,000 on Jan 18, 2012

20 MAMMOTH RD

LONDONDERRY, NH 03053
3
Beds
1.5
Baths
1,641 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 ac
Lot SizeThe size of the land the home sits on, from county records.
1964
Year BuiltThe year the home was originally built, according to county records.
2
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

$532K
$506K low$558K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$215,000 · Jan 18, 2012

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,189 (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.$445,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$199,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$245,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$548,625

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.1988
Lot (acres)The size of the land the home sits on, from county records.1.00
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

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 · 1.9 mi
H
Londonderry High SchoolA-
High · Grades 9–12 · 4.2 mi
M
Londonderry Middle SchoolC+
Middle · Grades 6–8 · 4.5 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%

Owner Tools

Do you own this home?
Claim this home

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

20 Mammoth Rd 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 less than 68% of homes in Rockingham County
  • Older than 95% of 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
$232K$935K

This home is worth more than 42% 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$531,901
CheaperTypical $565,731Pricier

Pricier than 42% of homes nearby

Price per ft²$324
CheaperTypical $308Pricier

Pricier than 60% of homes nearby

Living area1,641 ft²
SmallerTypical 1,776 ft²Bigger

Bigger than 44% of homes nearby

Lot size1 ac
SmallerTypical 1 acBigger

Bigger than 50% of homes nearby

Year built1964
OlderTypical 1985Newer

Newer than 5% of homes nearby

How 20 Mammoth Rd ranks against every home in each area.
MeasureThis homeLondonderry 03053Rockingham County
Estimated valuepricier than$531,90142% of homes32% of homes
Price per ft²pricier than$32460% of homes44% of homes
Living areabigger than1,641 ft²44% of homes45% of homes
Lot sizebigger than1 ac50% of homes53% of homes
Year builtnewer than19645% of homes24% of homes

About 20 Mammoth Rd

How much is 20 Mammoth Rd, Londonderry, NH worth?

The TopHap Estimate for 20 Mammoth Rd, Londonderry, NH is $531,901 as of Aug 30, 2026. The likely range is $506,281 to $557,521. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Mammoth Rd, Londonderry, NH last sell?

20 Mammoth Rd, Londonderry, NH last sold on Jan 18, 2012 for $215,000, according to the county's recorded deed.

How big is 20 Mammoth Rd, Londonderry, NH?

20 Mammoth Rd, Londonderry, NH has 3 bedrooms, 1.5 bathrooms, 1,641 square feet of living space and a 1.00-acre lot.

When was 20 Mammoth Rd, Londonderry, NH built?

20 Mammoth Rd, Londonderry, NH was built in 1964, making it 62 years old. It is a colonial home. The building has 2 stories.

What schools serve 20 Mammoth Rd, Londonderry, NH?

20 Mammoth Rd, 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 20 Mammoth Rd, Londonderry, NH compare to other homes in Londonderry 03053?

Among the 9,228 homes in Londonderry 03053, it is worth more than 42% of them ($531,901 against a typical $565,731), its price per square foot is higher than 60% of them ($324 against a typical $308), it is bigger than 44% of them (1,641 ft² against a typical 1,776 ft²), its lot is bigger than 50% of them (1 ac against a typical 1 ac) and it is newer than 5% of them (1964 against a typical 1985). Measured against all of Rockingham County, it is worth more than 32% 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 20 Mammoth Rd, Londonderry, NH?

The 2025 property tax bill for 20 Mammoth Rd, Londonderry, NH was $7,189. The county assessed it at $445,400.

More homes on Mammoth Rd

Closest homes

More homes in Londonderry 03053

Assigned schools

Explore the area

See this home in context

Open 20 Mammoth Rd on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map