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Single Family ResidenceResidential
$1,446,423$458 / 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 92How 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 $1,396,000 on Jun 6, 2025

23 TAMMER LN

HOPKINTON, MA 01748
4
Beds
3.5
Baths
3,156 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.
1.52 ac
Lot SizeThe size of the land the home sits on, from county records.
1996
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.4M
$1.3M low$1.6M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,396,000 · Jun 6, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$18,715 (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.$1,327,300 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$352,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$974,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,180,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,326,510

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.106 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.1 percent flood zone

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
CountyMIDDLESEX
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.2010
Lot (acres)The size of the land the home sits on, from county records.1.52
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
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(9)

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
Marathon Elementary School
Elementary · Grades PK–1 · 1.6 mi
H
Hopkinton High SchoolA+
High · Grades 9–12 · 2.0 mi
M
Hopkinton Middle SchoolA+
Middle · Grades 6–8 · 2.0 mi

District: Hopkinton School District

Neighborhood · ZIP 01748These 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.97
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.66

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.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
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.19,208
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.687 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$189,861
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$255,819
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.48 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

Owner Tools

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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

23 Tammer Ln 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 87% of homes in Hopkinton 01748
  • Bigger than 87% of homes in Middlesex County
  • Has a bigger lot than 86% of homes in Middlesex County
  • Newer than 86% of homes in Middlesex County

What homes are worth in Hopkinton 01748

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

This home
$438K$2.1M

This home is worth more than 87% of homes in Hopkinton 01748.

How it measures up in Hopkinton 01748

The dot is this home. The mark in the middle is the typical home in Hopkinton 01748.

Estimated value$1,446,423
CheaperTypical $969,950Pricier

Pricier than 87% of homes nearby

Price per ft²$458
CheaperTypical $424Pricier

Pricier than 64% of homes nearby

Living area3,156 ft²
SmallerTypical 2,322 ft²Bigger

Bigger than 78% of homes nearby

Lot size1.52 ac
SmallerTypical 1.24 acBigger

Bigger than 64% of homes nearby

Year built1996
OlderTypical 1992Newer

Newer than 61% of homes nearby

How 23 Tammer Ln ranks against every home in each area.
MeasureThis homeHopkinton 01748Middlesex County
Estimated valuepricier than$1,446,42387% of homes87% of homes
Price per ft²pricier than$45864% of homes50% of homes
Living areabigger than3,156 ft²78% of homes87% of homes
Lot sizebigger than1.52 ac64% of homes86% of homes
Year builtnewer than199661% of homes86% of homes

About 23 Tammer Ln

How much is 23 Tammer Ln, Hopkinton, MA worth?

The TopHap Estimate for 23 Tammer Ln, Hopkinton, MA is $1,446,423 as of Sep 24, 2026. The likely range is $1,327,587 to $1,565,259. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 23 Tammer Ln, Hopkinton, MA last sell?

23 Tammer Ln, Hopkinton, MA last sold on Jun 6, 2025 for $1,396,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 23 Tammer Ln, Hopkinton, MA?

23 Tammer Ln, Hopkinton, MA has 4 bedrooms, 3.5 bathrooms, 3,156 square feet of living space and a 1.52-acre lot.

When was 23 Tammer Ln, Hopkinton, MA built?

23 Tammer Ln, Hopkinton, MA was built in 1996, making it 30 years old. It is a colonial home. The building has 2 stories.

What schools serve 23 Tammer Ln, Hopkinton, MA?

23 Tammer Ln, Hopkinton, MA is assigned to Marathon Elementary School (elementary); Hopkinton High School (high), rated A+; Hopkinton Middle School (middle), rated A+. All sit in Hopkinton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 23 Tammer Ln, Hopkinton, MA compare to other homes in Hopkinton 01748?

Among the 6,096 homes in Hopkinton 01748, it is worth more than 87% of them ($1,446,423 against a typical $969,950), its price per square foot is higher than 64% of them ($458 against a typical $424), it is bigger than 78% of them (3,156 ft² against a typical 2,322 ft²), its lot is bigger than 64% of them (1.52 ac against a typical 1.24 ac) and it is newer than 61% of them (1996 against a typical 1992). Measured against all of Middlesex County, it is worth more than 87% 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 23 Tammer Ln, Hopkinton, MA?

The 2026 property tax bill for 23 Tammer Ln, Hopkinton, MA was $18,715. The county assessed it at $1,327,300.

More homes on Tammer Ln

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