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Single Family ResidenceResidential
$401,076$329 / 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 84How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $685,000 on Jul 20, 2021

20 PREBLE ST

DOVER, NH 03820
2
Beds
1
Baths
1,220 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.
3,485 ft²
Lot SizeThe size of the land the home sits on, from county records.
1870
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

$401K
$336K low$466K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$685,000 · Jul 20, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,788 (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.$294,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$113,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$180,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$414,580

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.22 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.Conventional
CountySTRAFFORD
Lot (acres)The size of the land the home sits on, from county records.0.08
HeatingThe type of heating system in the home.Steam
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(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.

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

E
Frances G. Hopkins Elementary School At Horne StreetB-
Elementary · Grades KG–4 · 0.8 mi
M
Dover Middle SchoolB-
Middle · Grades 5–8 · 1.7 mi
H
Dover High School
High · Grades 9–12 · 1.8 mi

District: Dover School District

Neighborhood · ZIP 03820These 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.100
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.101
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.106

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.2%
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.33,546
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,143 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$98,826
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$120,547
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

20 Preble 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 less than 84% of homes in Dover 03820
  • Smaller than 75% of homes in Dover 03820
  • Among the smallest lots in Strafford County
  • Older than 96% of homes in Strafford County

What homes are worth in Dover 03820

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

This home
$223K$1.5M

This home is worth more than 16% of homes in Dover 03820.

How it measures up in Dover 03820

The dot is this home. The mark in the middle is the typical home in Dover 03820.

Estimated value$401,076
CheaperTypical $550,376Pricier

Pricier than 16% of homes nearby

Price per ft²$329
CheaperTypical $345Pricier

Pricier than 39% of homes nearby

Living area1,220 ft²
SmallerTypical 1,674 ft²Bigger

Bigger than 25% of homes nearby

Lot size3,485 ft²
SmallerTypical 0.39 acBigger

Bigger than 3% of homes nearby

Year built1870
OlderTypical 1975Newer

Newer than 5% of homes nearby

How 20 Preble St ranks against every home in each area.
MeasureThis homeDover 03820Strafford County
Estimated valuepricier than$401,07616% of homes22% of homes
Price per ft²pricier than$32939% of homes64% of homes
Living areabigger than1,220 ft²25% of homes27% of homes
Lot sizebigger than3,485 ft²3% of homesalmost no homes
Year builtnewer than18705% of homes4% of homes

About 20 Preble St

How much is 20 Preble St, Dover, NH worth?

The TopHap Estimate for 20 Preble St, Dover, NH is $401,076 as of Sep 24, 2026. The likely range is $336,139 to $466,013. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Preble St, Dover, NH last sell?

20 Preble St, Dover, NH last sold on Jul 20, 2021 for $685,000, according to the county's recorded deed.

How big is 20 Preble St, Dover, NH?

20 Preble St, Dover, NH has 2 bedrooms, 1 bathrooms, 1,220 square feet of living space and a 0.08-acre lot.

When was 20 Preble St, Dover, NH built?

20 Preble St, Dover, NH was built in 1870, making it 156 years old. It is a conventional home. The building has 2 stories.

What schools serve 20 Preble St, Dover, NH?

20 Preble St, Dover, NH is assigned to Frances G. Hopkins Elementary School At Horne Street (elementary), rated B-; Dover Middle School (middle), rated B-; Dover High School (high). All sit in Dover School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Preble St, Dover, NH compare to other homes in Dover 03820?

Among the 9,553 homes in Dover 03820, it is worth more than 16% of them ($401,076 against a typical $550,376), its price per square foot is higher than 39% of them ($329 against a typical $345), it is bigger than 25% of them (1,220 ft² against a typical 1,674 ft²), its lot is bigger than 3% of them (3,485 ft² against a typical 0.39 ac) and it is newer than 5% of them (1870 against a typical 1975). Measured against all of Strafford County, it is worth more than 22% 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 Preble St, Dover, NH?

The 2025 property tax bill for 20 Preble St, Dover, NH was $5,788. The county assessed it at $294,100.

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