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Single Family ResidenceResidential
$486,218$268 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $480,000 on Nov 18, 2021

21 WARNER ST

BLACKSTONE, MA 01504
3
Beds
1.5
Baths
1,816 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.
0.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
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

$486K
$469K low$503K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$480,000 · Nov 18, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,949 (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.$460,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$149,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$311,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$583,395

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.Cape Cod
CountyWORCESTER
Lot (acres)The size of the land the home sits on, from county records.0.46
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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.

M
Frederick W. Hartnett Middle SchoolC+
Middle · Grades 6–8 · 0.6 mi
H
Blackstone - Millville Regional High SchoolD+
High · Grades 9–12 · 1.3 mi
E
John F. Kennedy Elementary School
Elementary · Grades KG–2 · 1.5 mi

District: Blackstone-Millville School District

Neighborhood · ZIP 01504These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.57

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.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.9,321
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.819 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$97,474
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$118,407
Average tempThe average temperature here across a full year.49°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.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

21 Warner 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.

  • Costs less per square foot than 73% of homes in Blackstone 01504
  • Newer than 70% of homes in Worcester County

What homes are worth in Blackstone 01504

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

This home
$267K$764K

This home is worth more than 64% of homes in Blackstone 01504.

How it measures up in Blackstone 01504

The dot is this home. The mark in the middle is the typical home in Blackstone 01504.

Estimated value$486,218
CheaperTypical $438,904Pricier

Pricier than 64% of homes nearby

Price per ft²$268
CheaperTypical $301Pricier

Pricier than 27% of homes nearby

Living area1,816 ft²
SmallerTypical 1,576 ft²Bigger

Bigger than 64% of homes nearby

Lot size0.46 ac
SmallerTypical 0.57 acBigger

Bigger than 43% of homes nearby

Year built1987
OlderTypical 1978Newer

Newer than 68% of homes nearby

How 21 Warner St ranks against every home in each area.
MeasureThis homeBlackstone 01504Worcester County
Estimated valuepricier than$486,21864% of homes51% of homes
Price per ft²pricier than$26827% of homes28% of homes
Living areabigger than1,816 ft²64% of homes56% of homes
Lot sizebigger than0.46 ac43% of homes48% of homes
Year builtnewer than198768% of homes70% of homes

About 21 Warner St

How much is 21 Warner St, Blackstone, MA worth?

The TopHap Estimate for 21 Warner St, Blackstone, MA is $486,218 as of Aug 30, 2026. The likely range is $469,105 to $503,331. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Warner St, Blackstone, MA last sell?

21 Warner St, Blackstone, MA last sold on Nov 18, 2021 for $480,000, according to the county's recorded deed.

How big is 21 Warner St, Blackstone, MA?

21 Warner St, Blackstone, MA has 3 bedrooms, 1.5 bathrooms, 1,816 square feet of living space and a 0.46-acre lot.

When was 21 Warner St, Blackstone, MA built?

21 Warner St, Blackstone, MA was built in 1987, making it 39 years old. It is a cape cod home. The building has 2 stories.

What schools serve 21 Warner St, Blackstone, MA?

21 Warner St, Blackstone, MA is assigned to Frederick W. Hartnett Middle School (middle), rated C+; Blackstone - Millville Regional High School (high), rated D+; John F. Kennedy Elementary School (elementary). All sit in Blackstone-Millville School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Warner St, Blackstone, MA compare to other homes in Blackstone 01504?

Among the 2,985 homes in Blackstone 01504, it is worth more than 64% of them ($486,218 against a typical $438,904), its price per square foot is higher than 27% of them ($268 against a typical $301), it is bigger than 64% of them (1,816 ft² against a typical 1,576 ft²), its lot is bigger than 43% of them (0.46 ac against a typical 0.57 ac) and it is newer than 68% of them (1987 against a typical 1978). Measured against all of Worcester County, it is worth more than 51% 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 21 Warner St, Blackstone, MA?

The 2025 property tax bill for 21 Warner St, Blackstone, MA was $6,949. The county assessed it at $460,200.

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