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Single Family ResidenceResidential
$426,017$277 / 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 93How 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 $241,000 on Mar 3, 2021

21 KNOX ST

WORCESTER, MA 01603
3
Beds
1.5
Baths
1,536 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1910
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

$426K
$395K low$458K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$241,000 · Mar 3, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,378 (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.$331,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$95,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$236,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$410,400

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
CountyWORCESTER
Lot (acres)The size of the land the home sits on, from county records.0.15
ConstructionThe main material the home's frame and walls are built from.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Steam
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.In-Ground Pool

Transaction History(11)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(3)

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

E
Heard StreetB-
Elementary · Grades KG–6 · 0.3 mi
M
University Pk Campus SchoolC
Middle · Grades 7–12 · 1.3 mi

District: Worcester School District

Neighborhood · ZIP 01603These 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.102
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.56

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.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
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.23,089
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,925 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$57,774
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$79,240
Average tempThe average temperature here across a full year.47°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.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 Knox 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 more than 72% of homes in Worcester 01603
  • Costs less per square foot than 67% of homes in Hadwen Park
  • Bigger than 68% of homes in Hadwen Park
  • Has a smaller lot than 89% of homes in Worcester County
  • Older than 84% of homes in Worcester County

What homes are worth in Worcester 01603

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

This home
$224K$568K

This home is worth more than 72% of homes in Worcester 01603.

How it measures up in Worcester 01603

The dot is this home. The mark in the middle is the typical home in Worcester 01603.

Estimated value$426,017
CheaperTypical $385,071Pricier

Pricier than 72% of homes nearby

Price per ft²$277
CheaperTypical $301Pricier

Pricier than 34% of homes nearby

Living area1,536 ft²
SmallerTypical 1,442 ft²Bigger

Bigger than 57% of homes nearby

Lot size0.15 ac
SmallerTypical 0.18 acBigger

Bigger than 39% of homes nearby

Year built1910
OlderTypical 1926Newer

Newer than 34% of homes nearby

How 21 Knox St ranks against every home in each area.
MeasureThis homeHadwen ParkWorcester 01603Worcester County
Estimated valuepricier than$426,01762% of homes72% of homes36% of homes
Price per ft²pricier than$27733% of homes34% of homes34% of homes
Living areabigger than1,536 ft²68% of homes57% of homes41% of homes
Lot sizebigger than0.15 ac26% of homes39% of homes11% of homes
Year builtnewer than191025% of homes34% of homes16% of homes

About 21 Knox St

How much is 21 Knox St, Worcester, MA worth?

The TopHap Estimate for 21 Knox St, Worcester, MA is $426,017 as of Sep 24, 2026. The likely range is $394,519 to $457,515. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Knox St, Worcester, MA last sell?

21 Knox St, Worcester, MA last sold on Mar 3, 2021 for $241,000, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 21 Knox St, Worcester, MA?

21 Knox St, Worcester, MA has 3 bedrooms, 1.5 bathrooms, 1,536 square feet of living space and a 0.15-acre lot.

When was 21 Knox St, Worcester, MA built?

21 Knox St, Worcester, MA was built in 1910, making it 116 years old. It is a conventional home. The building has 2 stories.

What schools serve 21 Knox St, Worcester, MA?

21 Knox St, Worcester, MA is assigned to Heard Street (elementary), rated B-; University Pk Campus School (middle), rated C. All sit in Worcester School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Knox St, Worcester, MA compare to other homes in Worcester 01603?

Among the 4,632 homes in Worcester 01603, it is worth more than 72% of them ($426,017 against a typical $385,071), its price per square foot is higher than 34% of them ($277 against a typical $301), it is bigger than 57% of them (1,536 ft² against a typical 1,442 ft²), its lot is bigger than 39% of them (0.15 ac against a typical 0.18 ac) and it is newer than 34% of them (1910 against a typical 1926). Measured against all of Worcester County, it is worth more than 36% 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 Knox St, Worcester, MA?

The 2025 property tax bill for 21 Knox St, Worcester, MA was $4,378. The county assessed it at $331,900.

More homes on Knox St

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