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Triplex (3 Units, Any Combination)Residential
Last sold for $272,500 on Mar 2, 1999

9 KNAPP ST

SOMERVILLE, MA 02143
5
Beds
3
Baths
3,386 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.
3,531 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.
3
StoriesHow many floors the home has above ground.
15
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$272,500 · Mar 2, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,929 (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.$1,276,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$593,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$683,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,247,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Triplex (3 Units, Any Combination)
CountyMiddlesex
Lot (acres)The size of the land the home sits on, from county records.0.08
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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
Albert F. Argenziano School at Lincoln ParkA-
Elementary · Grades PK–8 · 0.3 mi
H
Somerville High SchoolB-
High · Grades 9–12 · 0.4 mi

District: Somerville School District

Neighborhood · ZIP 02143These 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.136
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.96%
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.8.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.26,484
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.17,570 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$113,148
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$143,076
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.58%

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 Knapp 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.

  • Bigger than 91% of homes in Middlesex County
  • Has a smaller lot than 93% of homes in Middlesex County
  • Newer than 80% of homes in Union Square / Prospect Hill

How it measures up in Somerville 02143

The dot is this home. The mark in the middle is the typical home in Somerville 02143.

Living area3,386 ft²
SmallerTypical 1,748 ft²Bigger

Bigger than 86% of homes nearby

Lot size3,531 ft²
SmallerTypical 4,095 ft²Bigger

Bigger than 38% of homes nearby

Year built1920
OlderTypical 1900Newer

Newer than 78% of homes nearby

How 9 Knapp St ranks against every home in each area.
MeasureThis homeUnion Square / Prospect HillSomerville 02143Middlesex County
Living areabigger than3,386 ft²85% of homes86% of homes91% of homes
Lot sizebigger than3,531 ft²39% of homes38% of homes7% of homes
Year builtnewer than192080% of homes78% of homes25% of homes

About 9 Knapp St

When did 9 Knapp St, Somerville, MA last sell?

9 Knapp St, Somerville, MA last sold on Mar 2, 1999 for $272,500, according to the county's recorded deed.

How big is 9 Knapp St, Somerville, MA?

9 Knapp St, Somerville, MA has 5 bedrooms, 3 bathrooms, 3,386 square feet of living space and a 0.08-acre lot.

When was 9 Knapp St, Somerville, MA built?

9 Knapp St, Somerville, MA was built in 1920, making it 106 years old. The building has 3 stories.

What schools serve 9 Knapp St, Somerville, MA?

9 Knapp St, Somerville, MA is assigned to Albert F. Argenziano School at Lincoln Park (elementary), rated A-; Somerville High School (high), rated B-. All sit in Somerville School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9 Knapp St, Somerville, MA compare to other homes in Somerville 02143?

Among the 5,956 homes in Somerville 02143, it is bigger than 86% of them (3,386 ft² against a typical 1,748 ft²), its lot is bigger than 38% of them (3,531 ft² against a typical 4,095 ft²) and it is newer than 78% of them (1920 against a typical 1900). 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 Knapp St, Somerville, MA?

The 2025 property tax bill for 9 Knapp St, Somerville, MA was $13,929. The county assessed it at $1,276,700.

More homes on Knapp St

Closest homes

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Assigned schools

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