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Single Family ResidenceResidential
$8,258,373$1,415 / 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 Sep 24, 2026
Last sold for $8,050,000 on Mar 23, 2026

9 WALNUT ST

BOSTON, MA 02108
5
Beds
5 / 2
Baths
5,838 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.
1,497 ft²
Lot SizeThe size of the land the home sits on, from county records.
1899
Year BuiltThe year the home was originally built, according to county records.
5
StoriesHow many floors the home has above ground.
12
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$8.3M
$8M low$8.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$8,050,000 · Mar 23, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$91,504 (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.$7,901,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,940,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$4,961,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$9,082,760

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
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.2008
Lot (acres)The size of the land the home sits on, from county records.0.03
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
RoofThe main material covering the roof, such as asphalt shingle or tile.Slate
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(10)

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.

H
Boston Adult Technical Academy
High · Grades 9–12 · 0.6 mi
E
Josiah Quincy Elementary SchoolB
Elementary · Grades PK–5 · 0.7 mi
M
Quincy Upper SchoolD
Middle · Grades 6–12 · 0.7 mi

District: Boston School District

Neighborhood · ZIP 02108These 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.161
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.75

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.84%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.38%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.4,496
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.33,417 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$154,589
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$241,580
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.46 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

9 Walnut 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.

  • Among the most valuable homes in Suffolk County
  • Costs more per square foot than 94% of homes in Suffolk County
  • Bigger than 98% of homes in Suffolk County
  • Has a bigger lot than 82% of homes in Beacon Hill
  • Older than 82% of homes in Suffolk County

What homes are worth in Boston 02108

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

This home
$457K$10M

This home is worth more than 95% of homes in Boston 02108.

How it measures up in Boston 02108

The dot is this home. The mark in the middle is the typical home in Boston 02108.

Estimated value$8,258,373
CheaperTypical $1,600,051Pricier

Pricier than 95% of homes nearby

Price per ft²$1415
CheaperTypical $1397Pricier

Pricier than 54% of homes nearby

Living area5,838 ft²
SmallerTypical 1,296 ft²Bigger

Bigger than 95% of homes nearby

Lot size1,497 ft²
SmallerTypical 1,133 ft²Bigger

Bigger than 68% of homes nearby

Year built1899
OlderTypical 1899Newer

Newer than 62% of homes nearby

How 9 Walnut St ranks against every home in each area.
MeasureThis homeBeacon HillBoston 02108Suffolk County
Estimated valuepricier than$8,258,37398% of homes95% of homesalmost all homes
Price per ft²pricier than$141561% of homes54% of homes94% of homes
Living areabigger than5,838 ft²96% of homes95% of homes98% of homes
Lot sizebigger than1,497 ft²82% of homes68% of homes39% of homes
Year builtnewer than189963% of homes62% of homes18% of homes

About 9 Walnut St

How much is 9 Walnut St, Boston, MA worth?

The TopHap Estimate for 9 Walnut St, Boston, MA is $8,258,373 as of Sep 24, 2026. The likely range is $7,968,594 to $8,548,152. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9 Walnut St, Boston, MA last sell?

9 Walnut St, Boston, MA last sold on Mar 23, 2026 for $8,050,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 9 Walnut St, Boston, MA?

9 Walnut St, Boston, MA has 5 bedrooms, 5 bathrooms, 5,838 square feet of living space and a 0.03-acre lot.

When was 9 Walnut St, Boston, MA built?

9 Walnut St, Boston, MA was built in 1899, making it 127 years old. The building has 5 stories.

What schools serve 9 Walnut St, Boston, MA?

9 Walnut St, Boston, MA is assigned to Boston Adult Technical Academy (high); Josiah Quincy Elementary School (elementary), rated B; Quincy Upper School (middle), rated D. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9 Walnut St, Boston, MA compare to other homes in Boston 02108?

Among the 1,489 homes in Boston 02108, it is worth more than 95% of them ($8,258,373 against a typical $1,600,051), its price per square foot is higher than 54% of them ($1415 against a typical $1397), it is bigger than 95% of them (5,838 ft² against a typical 1,296 ft²), its lot is bigger than 68% of them (1,497 ft² against a typical 1,133 ft²) and it is newer than 62% of them (1899 against a typical 1899). Measured against all of Suffolk County, it is worth more than almost all 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 9 Walnut St, Boston, MA?

The 2025 property tax bill for 9 Walnut St, Boston, MA was $91,504. The county assessed it at $7,901,900.

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