Duplex (2 Units, Any Combination)Residential
21 OSBORNE RD # 23
BROOKLINE, MA 02446
5
Beds
3
Baths
3,172 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1908
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
Tax & Assessment
Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$19,847 (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.$2,010,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,242,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$767,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,984,400
Property Facts
Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Victorian
CountyNorfolk
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.1965
Lot (acres)The size of the land the home sits on, from county records.0.12
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.Slate
HeatingThe type of heating system in the home.Forced Air
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(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.
EH
Edward Devotion SchoolA
Elementary · Grades KG–8 · 0.3 mi
Brookline High SchoolA+
High · Grades 9–12 · 1.2 mi
District: Brookline School District
Neighborhood · ZIP 02446These 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.144
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.76
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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.31,401
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.23,893 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$115,895
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$169,699
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.52%
Owner Tools
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How this home compares
21 Osborne Rd # 23 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.
- Bigger than 89% of homes in Norfolk County
- Has a smaller lot than 91% of homes in Norfolk County
- Older than 89% of homes in Norfolk County
How it measures up in Brookline 02446
The dot is this home. The mark in the middle is the typical home in Brookline 02446.
Living area3,172 ft²
SmallerTypical 1,246 ft²Bigger
Bigger than 86% of homes nearby
Lot size0.12 ac
SmallerTypical 0.29 acBigger
Bigger than 19% of homes nearby
Year built1908
OlderTypical 1925Newer
Newer than 24% of homes nearby
| Measure | This home | Coolidge Corner | Brookline 02446 | Norfolk County |
|---|---|---|---|---|
| Living areabigger than | 3,172 ft² | 86% of homes | 86% of homes | 89% of homes |
| Lot sizebigger than | 0.12 ac | 19% of homes | 19% of homes | 9% of homes |
| Year builtnewer than | 1908 | 23% of homes | 24% of homes | 11% of homes |
About 21 Osborne Rd # 23
How big is 21 Osborne Rd # 23, Brookline, MA?
21 Osborne Rd # 23, Brookline, MA has 5 bedrooms, 3 bathrooms, 3,172 square feet of living space and a 0.12-acre lot.
When was 21 Osborne Rd # 23, Brookline, MA built?
21 Osborne Rd # 23, Brookline, MA was built in 1908, making it 118 years old. It is a victorian home. The building has 3 stories.
What schools serve 21 Osborne Rd # 23, Brookline, MA?
21 Osborne Rd # 23, Brookline, MA is assigned to Edward Devotion School (elementary), rated A; Brookline High School (high), rated A+. All sit in Brookline School District. Attendance boundaries change — confirm with the district before relying on an assignment.
How does 21 Osborne Rd # 23, Brookline, MA compare to other homes in Brookline 02446?
Among the 7,868 homes in Brookline 02446, it is bigger than 86% of them (3,172 ft² against a typical 1,246 ft²), its lot is bigger than 19% of them (0.12 ac against a typical 0.29 ac) and it is newer than 24% of them (1908 against a typical 1925). 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 Osborne Rd # 23, Brookline, MA?
The 2025 property tax bill for 21 Osborne Rd # 23, Brookline, MA was $19,847. The county assessed it at $2,010,800.
More homes on Osborne Rd # 23
- 37 Osborne Rd$3.1M4 bd · 3.5 ba · 3,853 ft² · Sold $2.8M · Jul 2024
- 12 Osborne Rd$1.2M3 bd · 2.5 ba · 1,682 ft² · Sold $965K · May 2022
- 36 Osborne Rd$3.2M9 bd · 3 ba · 4,084 ft² · Sold $1.7M · Nov 2021
- 26 Osborne Rd$3M8 bd · 4 ba · 2,874 ft² · Sold $999K · Nov 2006
- 18 Osborne Rd$3.1M6 bd · 3.5 ba · 3,534 ft² · Sold $1M · Oct 2006
- 27 Osborne Rd$2.9M5 bd · 4 ba · 3,172 ft² · Sold $846K · Aug 2001
- 31 Osborne Rd4 bd · 3 ba · 3,112 ft² · Sold $755K · Jun 2000
- 41 Osborne Rd$2.7M7 bd · 2.5 ba · 2,944 ft² · Sold $500K · Mar 1999
- 9 Osborne Rd$2.9M6 bd · 2.5 ba · 2,521 ft² · Sold $630K · Jun 1998
- 30 Osborne Rd5 bd · 3 ba · 3,059 ft² · Sold $300K · Jul 1996
- 22 Osborne Rd5 bd · 3 ba · 3,881 ft² · Sold $150K · Dec 1995
- 5 Osborne Rd$2.6M5 bd · 2 ba · 2,969 ft² · Sold $150K · Jan 1984
Closest homes
- 17 Osborne Rd59 ft · 6 bd · 2 ba · 3,526 ft²
- 27 Osborne Rd$2.9M61 ft · 5 bd · 4 ba · 3,172 ft² · Sold $846K · Aug 2001
- 33 Abbottsford Rd$2.7M87 ft · 5 bd · 2.5 ba · 2,543 ft² · Sold $385K · May 1986
- 29 Abbottsford Rd$3.4M97 ft · 5 bd · 4.5 ba · 2,983 ft² · Sold $2.1M · Nov 2018
- 22 Osborne Rd135 ft · 5 bd · 3 ba · 3,881 ft² · Sold $150K · Dec 1995
- 26 Osborne Rd$3M140 ft · 8 bd · 4 ba · 2,874 ft² · Sold $999K · Nov 2006
- 11 Osborne Rd$3.4M119 ft · 6 bd · 2.5 ba · 3,482 ft² · Sold $159K · Aug 1982
- 18 Osborne Rd$3.1M153 ft · 6 bd · 3.5 ba · 3,534 ft² · Sold $1M · Oct 2006
More homes in Brookline 02446
- 45 Longwood Ave$849K2 bd · 2 ba · 1,161 ft² · Sold $835K · Sep 2026
- 38 Fuller St$3.9M5 bd · 4.5 ba · 3,170 ft² · Sold $4.4M · Sep 2026
- 16 York Ter$2.8M4 bd · 6 ba · 3,050 ft² · Sold $2.8M · Sep 2026
- 1600 Beacon St$549K1 bd · 1 ba · 557 ft² · Sold $475K · Sep 2026
- 80 Vernon St$3.2M4 bd · 2.5 ba · 2,319 ft² · Sold $3.1M · Sep 2026
- 132 Sewall Ave$1.7M3 bd · 2 ba · 1,873 ft² · Sold $1.7M · Sep 2026
- 2 Mason Ter$3M6 bd · 3.5 ba · 5,748 ft² · Sold $2.5M · Sep 2026
- 1471 Beacon St$1.7M3 bd · 2 ba · 1,877 ft² · Sold $1.6M · Sep 2026
- 57 Harvard Ave$849K1 bd · 1 ba · 955 ft² · Sold $850K · Sep 2026
- 15 Monmouth Ct$682K1 bd · 1 ba · 850 ft² · Sold $682K · Sep 2026
- 11 Longwood Ave$1.9M2 bd · 2.5 ba · 1,800 ft² · Sold $1.9M · Sep 2026
- 178 Ivy St$4.7M3 bd · 2.5 ba · 2,556 ft² · Sold $4.7M · Sep 2026
Assigned schools
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