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CondominiumResidential

491 Mammoth Rd

LONDONDERRY, NH 03053
627 ft²
Lot SizeThe size of the land the home sits on, from county records.
1993
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 199144 units1,010–1,190 ft²
$14M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$320K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$294
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-26.7%vs the Londonderry ZIP median sale $/ft² ($401)

Sales Performance

$299K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
-2.0%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
2.3%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20212022202320242025
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20212022202320242025

13 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$300K$334K$367K$401K1,010 ft²1,046 ft²1,082 ft²1,118 ft²1,154 ft²1,190 ft²
1 bd2 bd
1 bed
1 unit
2 bed
43 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
2 bd · 1 ba · 1,010 ft²
7 units
2 bd · 1 ba · 1,115 ft²
6 units
2 bd · 1 ba · 1,148 ft²
6 units
2 bd · 2 ba · 1,190 ft²
6 units
2 bd · 2.5 ba · 1,190 ft²
6 units
2 bd · 1 ba · 1,107 ft²
5 units
2 bd · 1.5 ba · 1,115 ft²
2 units
2 bd · 1.5 ba · 1,148 ft²
2 units
One-off layouts
4 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$300K–$312K
10 units
$313K–$321K
14 units
$326K–$337K
8 units
$339K–$350K
10 units
$356K–$356K
1 unit
$401K–$401K
1 unit

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.86%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.30%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.9.2 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.27%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.28%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$340,761
Median tax billThe middle annual property tax bill among the building's units.$3,912
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 26Nov 24, 2025$299,000Unit 25May 9, 2025$305,000Unit 43Jan 24, 2025$297,533Unit 12Dec 31, 2024$374,933Unit 41Sep 19, 2024$320,000Unit 2Apr 26, 2024$290,000Unit 4Oct 17, 2023$300,000Unit 5Oct 13, 2023$275,000Unit 18Aug 22, 2023$299,000Unit 24Aug 2, 2023$255,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyROCKINGHAM
Lot (acres)The size of the land the home sits on, from county records.0.01
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.Forced Air With Air Conditioning
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

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

E
North Elementary School
Elementary · Grades 1–5 · 0.5 mi
M
Londonderry Middle SchoolB-
Middle · Grades 6–8 · 2.8 mi
H
Londonderry High SchoolB
High · Grades 9–12 · 3.1 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%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

491 Mammoth Rd
2 bd · 2 ba · 1,190 ft²
$343K
491 Mammoth Rd # 2
2 bd · 2 ba · 1,026 ft²
$318K
491 Mammoth Rd # 3
2 bd · 2 ba · 1,190 ft²
$343K
491 Mammoth Rd
2 bd · 2 ba · 1,190 ft²
$356K
491 Mammoth Rd # 5
2 bd · 2 ba · 1,090 ft²
$331K
491 Mammoth Rd # 6
2 bd · 2 ba · 1,190 ft²
$350K
491 Mammoth Rd # 7
2 bd · 1 ba · 1,107 ft²
$346K
491 Mammoth Rd # 8
2 bd · 1.5 ba · 1,148 ft²
$337K
491 Mammoth Rd
2 bd · 1 ba · 1,148 ft²
$315K
491 Mammoth Rd # 10
2 bd · 1 ba · 1,148 ft²
$339K
491 Mammoth Rd # 11
2 bd · 1 ba · 1,148 ft²
$339K
491 Mammoth Rd # 12
2 bd · 1 ba · 1,107 ft²
$401K
491 Mammoth Rd # 13
2 bd · 1 ba · 1,107 ft²
$346K
491 Mammoth Rd # 14
2 bd · 1 ba · 1,148 ft²
$337K
491 Mammoth Rd # 15
2 bd · 1.5 ba · 1,148 ft²
$337K
491 Mammoth Rd # 16
2 bd · 1 ba · 1,107 ft²
$335K
491 Mammoth Rd # 17
1 bd · 1.5 ba · 1,107 ft²
$337K
491 Mammoth Rd # 18
2 bd · 1 ba · 1,148 ft²
$342K
491 Mammoth Rd # 19
2 bd · 1 ba · 1,148 ft²
$337K
491 Mammoth Rd # 20
2 bd · 1 ba · 1,107 ft²
$343K
491 Mammoth Rd # 21
2 bd · 1 ba · 1,115 ft²
$319K
491 Mammoth Rd # 22
2 bd · 1 ba · 1,115 ft²
$319K
491 Mammoth Rd # 23
2 bd · 1 ba · 1,010 ft²
$311K
491 Mammoth Rd # 24
2 bd · 1 ba · 1,010 ft²
$307K
491 Mammoth Rd # 25
2 bd · 1.5 ba · 1,115 ft²
$321K
491 Mammoth Rd # 26
2 bd · 1 ba · 1,115 ft²
$309K
491 Mammoth Rd # 27
2 bd · 1 ba · 1,010 ft²
$304K
491 Mammoth Rd # 28
2 bd · 1.5 ba · 1,010 ft²
$304K
491 Mammoth Rd # 29
2 bd · 1 ba · 1,010 ft²
$326K
491 Mammoth Rd # 30
2 bd · 1 ba · 1,010 ft²
$312K
491 Mammoth Rd # 31
2 bd · 1 ba · 1,115 ft²
$318K
491 Mammoth Rd # 32
2 bd · 1.5 ba · 1,115 ft²
$306K
491 Mammoth Rd # 33
2 bd · 1 ba · 1,010 ft²
$308K
491 Mammoth Rd # 34
2 bd · 1 ba · 1,010 ft²
$304K
491 Mammoth Rd # 35
2 bd · 1 ba · 1,115 ft²
$313K
491 Mammoth Rd # 36
2 bd · 1 ba · 1,115 ft²
$321K
491 Mammoth Rd # 37
2 bd · 2 ba · 1,190 ft²
$316K
491 Mammoth Rd # 38
2 bd · 2.5 ba · 1,190 ft²
$316K
491 Mammoth Rd # 39
2 bd · 2 ba · 1,190 ft²
$316K
491 Mammoth Rd # 40
2 bd · 2.5 ba · 1,190 ft²
$317K
491 Mammoth Rd # 41
2 bd · 2.5 ba · 1,190 ft²
$340K
491 Mammoth Rd # 42
2 bd · 2.5 ba · 1,190 ft²
$300K
491 Mammoth Rd # 43
2 bd · 2.5 ba · 1,190 ft²
$317K
491 Mammoth Rd # 44
2 bd · 2.5 ba · 1,190 ft²
$317K

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

About 491 Mammoth Rd

How many units are in 491 Mammoth Rd, Londonderry, NH?

491 Mammoth Rd, Londonderry, NH has 44 residential units across built in 1991, according to county assessor records.

What is a unit at 491 Mammoth Rd, Londonderry, NH worth?

The median TopHap Estimate across the 44 units at 491 Mammoth Rd, Londonderry, NH is $320,056. That works out to $294 per square foot. Units run from 1,010 to 1,190 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 491 Mammoth Rd, Londonderry, NH expensive for Londonderry?

Units at 491 Mammoth Rd, Londonderry, NH carry a median of $294 per square foot, 27% below the Londonderry median of $401 per square foot.

How often do units sell at 491 Mammoth Rd, Londonderry, NH?

1 units at 491 Mammoth Rd, Londonderry, NH sold in the last 12 months, out of 13 recorded arms-length sales all time. That is a turnover rate of 2.3% of the building per year. The median sale over that period was $299K.

What floor plans does 491 Mammoth Rd, Londonderry, NH have?

The most common plan at 491 Mammoth Rd, Londonderry, NH is a 2-bedroom of 1,010 square feet, repeated 7 times, with a median estimate of $307,677. TopHap identifies 8 recurring plans in the building.

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Assigned schools

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