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Single Family ResidenceResidential
$815,541$607 / 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 91How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $335,000 on Jul 25, 2002

21 KNOLL ST

ROSLINDALE, MA 02131
2
Beds
2.5
Baths
1,344 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.
3,070 ft²
Lot SizeThe size of the land the home sits on, from county records.
1920
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$816K
$745K low$886K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$335,000 · Jul 25, 2002
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$563,741
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$450,993
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.30%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$251,800
BANK OF AMERICA · recorded Jun 12, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,330 (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.$546,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$219,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$327,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$802,750

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
CountySUFFOLK
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.2002
Lot (acres)The size of the land the home sits on, from county records.0.07
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

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
Charles Sumner Elementary SchoolD+
Elementary · Grades PK–5 · 0.5 mi
M
Washington Irving Middle School
Middle · Grades 6–8 · 0.7 mi
H
Margarita Muniz AcademyC-
High · Grades 9–12 · 1.4 mi

District: Boston School District

Neighborhood · ZIP 02131These 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.70
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.105
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.73

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.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
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.29,422
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.10,044 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$104,779
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$134,833
Average tempThe average temperature here across a full year.50°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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.Yes

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 Knoll 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 74% of homes in Roslindale 02131
  • Costs more per square foot than 85% of homes in Roslindale 02131
  • Smaller than 66% of homes in Roslindale 02131
  • Has a smaller lot than 75% of homes in Roslindale 02131

What homes are worth in Roslindale 02131

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

This home
$335K$1.2M

This home is worth more than 74% of homes in Roslindale 02131.

How it measures up in Roslindale 02131

The dot is this home. The mark in the middle is the typical home in Roslindale 02131.

Estimated value$815,541
CheaperTypical $696,912Pricier

Pricier than 74% of homes nearby

Price per ft²$607
CheaperTypical $501Pricier

Pricier than 85% of homes nearby

Living area1,344 ft²
SmallerTypical 1,649 ft²Bigger

Bigger than 34% of homes nearby

Lot size3,070 ft²
SmallerTypical 0.11 acBigger

Bigger than 25% of homes nearby

Year built1920
OlderTypical 1920Newer

Newer than 52% of homes nearby

How 21 Knoll St ranks against every home in each area.
MeasureThis homeRoslindale 02131Suffolk County
Estimated valuepricier than$815,54174% of homes62% of homes
Price per ft²pricier than$60785% of homes48% of homes
Living areabigger than1,344 ft²34% of homes45% of homes
Lot sizebigger than3,070 ft²25% of homes54% of homes
Year builtnewer than192052% of homes55% of homes

About 21 Knoll St

How much is 21 Knoll St, Roslindale, MA worth?

The TopHap Estimate for 21 Knoll St, Roslindale, MA is $815,541 as of Jul 14, 2026. The likely range is $745,104 to $885,978. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Knoll St, Roslindale, MA last sell?

21 Knoll St, Roslindale, MA last sold on Jul 25, 2002 for $335,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 21 Knoll St, Roslindale, MA?

21 Knoll St, Roslindale, MA has 2 bedrooms, 2.5 bathrooms, 1,344 square feet of living space and a 0.07-acre lot.

When was 21 Knoll St, Roslindale, MA built?

21 Knoll St, Roslindale, MA was built in 1920, making it 106 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Knoll St, Roslindale, MA?

21 Knoll St, Roslindale, MA is assigned to Charles Sumner Elementary School (elementary), rated D+; Washington Irving Middle School (middle); Margarita Muniz Academy (high), rated C-. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Knoll St, Roslindale, MA compare to other homes in Roslindale 02131?

Among the 7,665 homes in Roslindale 02131, it is worth more than 74% of them ($815,541 against a typical $696,912), its price per square foot is higher than 85% of them ($607 against a typical $501), it is bigger than 34% of them (1,344 ft² against a typical 1,649 ft²), its lot is bigger than 25% of them (3,070 ft² against a typical 0.11 ac) and it is newer than 52% of them (1920 against a typical 1920). Measured against all of Suffolk County, it is worth more than 62% 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 Knoll St, Roslindale, MA?

The 2025 property tax bill for 21 Knoll St, Roslindale, MA was $6,330. The county assessed it at $546,600.

More homes on Knoll St

Closest homes

More homes in Roslindale 02131

Assigned schools

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