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Single Family ResidenceResidential
$831,642$290 / 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 67How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

20 HARTFORD AVE W

MENDON, MA 01756
3
Beds
3
Baths
2,864 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.
3.7 ac
Lot SizeThe size of the land the home sits on, from county records.
2023
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$832K
$558K low$1.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$14,105 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$1,063,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$178,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$856,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,032,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$982,825

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.19 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.Colonial
CountyWORCESTER
Lot (acres)The size of the land the home sits on, from county records.3.70
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

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
Henry P. Clough Elementary SchoolB
Elementary · Grades PK–4 · 0.8 mi
M
Miscoe Hill Middle SchoolB-
Middle · Grades 5–8 · 1.9 mi
H
Nipmuc Regional High SchoolB
High · Grades 9–12 · 4.6 mi

District: Mendon-Upton School District

Neighborhood · ZIP 01756These 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.36
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.99
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.64

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.6,409
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.357 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$128,573
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$169,057
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.50%

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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 Hartford Ave W 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 92% of homes in Worcester County
  • Costs less per square foot than 76% of homes in Mendon 01756
  • Bigger than 87% of homes in Worcester County
  • Has a bigger lot than 88% of homes in Worcester County
  • Among the newest homes in Mendon 01756

What homes are worth in Mendon 01756

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

This home
$365K$1.2M

This home is worth more than 74% of homes in Mendon 01756.

How it measures up in Mendon 01756

The dot is this home. The mark in the middle is the typical home in Mendon 01756.

Estimated value$831,642
CheaperTypical $716,712Pricier

Pricier than 74% of homes nearby

Price per ft²$290
CheaperTypical $328Pricier

Pricier than 24% of homes nearby

Living area2,864 ft²
SmallerTypical 2,230 ft²Bigger

Bigger than 80% of homes nearby

Lot size3.7 ac
SmallerTypical 1.4 acBigger

Bigger than 87% of homes nearby

Year built2023
OlderTypical 1987Newer

Newer than almost all homes nearby

How 20 Hartford Ave W ranks against every home in each area.
MeasureThis homeMendon 01756Worcester County
Estimated valuepricier than$831,64274% of homes92% of homes
Price per ft²pricier than$29024% of homes43% of homes
Living areabigger than2,864 ft²80% of homes87% of homes
Lot sizebigger than3.7 ac87% of homes88% of homes
Year builtnewer than2023almost all homesalmost all homes

About 20 Hartford Ave W

How much is 20 Hartford Ave W, Mendon, MA worth?

The TopHap Estimate for 20 Hartford Ave W, Mendon, MA is $831,642 as of Oct 21, 2026. The likely range is $558,246 to $1,105,038. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Hartford Ave W, Mendon, MA last sell?

20 Hartford Ave W, Mendon, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 20 Hartford Ave W, Mendon, MA?

20 Hartford Ave W, Mendon, MA has 3 bedrooms, 3 bathrooms, 2,864 square feet of living space and a 3.70-acre lot.

When was 20 Hartford Ave W, Mendon, MA built?

20 Hartford Ave W, Mendon, MA was built in 2023, making it 3 years old. It is a colonial home. The building has 2 stories.

What schools serve 20 Hartford Ave W, Mendon, MA?

20 Hartford Ave W, Mendon, MA is assigned to Henry P. Clough Elementary School (elementary), rated B; Miscoe Hill Middle School (middle), rated B-; Nipmuc Regional High School (high), rated B. All sit in Mendon-Upton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Hartford Ave W, Mendon, MA compare to other homes in Mendon 01756?

Among the 2,161 homes in Mendon 01756, it is worth more than 74% of them ($831,642 against a typical $716,712), its price per square foot is higher than 24% of them ($290 against a typical $328), it is bigger than 80% of them (2,864 ft² against a typical 2,230 ft²), its lot is bigger than 87% of them (3.7 ac against a typical 1.4 ac) and it is newer than almost all of them (2023 against a typical 1987). Measured against all of Worcester County, it is worth more than 92% 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 Hartford Ave W, Mendon, MA?

The 2026 property tax bill for 20 Hartford Ave W, Mendon, MA was $14,105. The county assessed it at $1,063,700.

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