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Single Family ResidenceResidential
$630,946$184 / 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 Jul 14, 2026
Last sold for $330,000 on Aug 6, 2019

646 UPPER MAD RIVER RD

THORNTON, NH 03285
2
Beds
2
Baths
3,424 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.
1.22 ac
Lot SizeThe size of the land the home sits on, from county records.
1989
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$631K
$598K low$664K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$330,000 · Aug 6, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,026 (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.$598,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$120,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$478,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$468,825

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.33
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
3
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
47
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
97
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
17
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
CountyGRAFTON
Lot (acres)The size of the land the home sits on, from county records.1.22
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Radiant
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

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
Thornton Central SchoolB+
Elementary · Grades KG–8 · 3.7 mi
H
Plymouth Regional High SchoolB-
High · Grades 9–12 · 10.1 mi

District: Thornton School District

Neighborhood · ZIP 03285These 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.128
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.111

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.66%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.2,766
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.53 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$86,166
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$102,742
Average tempThe average temperature here across a full year.42°F
Annual precipHow much rain and melted snow falls here in a typical year.50 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.33%

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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

646 Upper Mad River 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 more than 80% of homes in Thornton 03285
  • Costs less per square foot than 95% of homes in Thornton 03285
  • Bigger than 94% of homes in Thornton 03285
  • Newer than 68% of homes in Grafton County

What homes are worth in Thornton 03285

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

This home
$194K$1.1M

This home is worth more than 80% of homes in Thornton 03285.

How it measures up in Thornton 03285

The dot is this home. The mark in the middle is the typical home in Thornton 03285.

Estimated value$630,946
CheaperTypical $447,245Pricier

Pricier than 80% of homes nearby

Price per ft²$184
CheaperTypical $261Pricier

Pricier than 5% of homes nearby

Living area3,424 ft²
SmallerTypical 1,741 ft²Bigger

Bigger than 94% of homes nearby

Lot size1.22 ac
SmallerTypical 1.5 acBigger

Bigger than 38% of homes nearby

Year built1989
OlderTypical 1986Newer

Newer than 60% of homes nearby

How 646 Upper Mad River Rd ranks against every home in each area.
MeasureThis homeThornton 03285Grafton County
Estimated valuepricier than$630,94680% of homes78% of homes
Price per ft²pricier than$1845% of homes17% of homes
Living areabigger than3,424 ft²94% of homes93% of homes
Lot sizebigger than1.22 ac38% of homes47% of homes
Year builtnewer than198960% of homes68% of homes

About 646 Upper Mad River Rd

How much is 646 Upper Mad River Rd, Thornton, NH worth?

The TopHap Estimate for 646 Upper Mad River Rd, Thornton, NH is $630,946 as of Jul 14, 2026. The likely range is $597,685 to $664,207. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 646 Upper Mad River Rd, Thornton, NH last sell?

646 Upper Mad River Rd, Thornton, NH last sold on Aug 6, 2019 for $330,000, according to the county's recorded deed.

How big is 646 Upper Mad River Rd, Thornton, NH?

646 Upper Mad River Rd, Thornton, NH has 2 bedrooms, 2 bathrooms, 3,424 square feet of living space and a 1.22-acre lot.

When was 646 Upper Mad River Rd, Thornton, NH built?

646 Upper Mad River Rd, Thornton, NH was built in 1989, making it 37 years old. It is a ranch home. The building has 1 story.

What schools serve 646 Upper Mad River Rd, Thornton, NH?

646 Upper Mad River Rd, Thornton, NH is assigned to Thornton Central School (elementary), rated B+; Plymouth Regional High School (high), rated B-. All sit in Thornton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 646 Upper Mad River Rd, Thornton, NH compare to other homes in Thornton 03285?

Among the 1,857 homes in Thornton 03285, it is worth more than 80% of them ($630,946 against a typical $447,245), its price per square foot is higher than 5% of them ($184 against a typical $261), it is bigger than 94% of them (3,424 ft² against a typical 1,741 ft²), its lot is bigger than 38% of them (1.22 ac against a typical 1.5 ac) and it is newer than 60% of them (1989 against a typical 1986). Measured against all of Grafton County, it is worth more than 78% 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 646 Upper Mad River Rd, Thornton, NH?

The 2025 property tax bill for 646 Upper Mad River Rd, Thornton, NH was $7,026. The county assessed it at $598,500.

More homes on Upper Mad River Rd

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