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Duplex (2 Units, Any Combination)Residential
Last sold for $899,900 on Dec 31, 2025

20 WALNUT AVE

ANDOVER, MA 01810
4
Beds
2
Baths
2,232 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.
0.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1918
Year BuiltThe year the home was originally built, according to county records.
2
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

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$899,900 · Dec 31, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,547 (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.$844,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$521,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$322,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$790,000

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.Duplex Single
CountyESSEX
Lot (acres)The size of the land the home sits on, from county records.0.24
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.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(7)

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.

M
West Middle SchoolA-
Middle · Grades 6–8 · 0.7 mi
H
Andover High SchoolA+
High · Grades 9–12 · 0.9 mi
E
Bancroft Elementary SchoolA
Elementary · Grades KG–5 · 1.9 mi

District: Andover School District

Neighborhood · ZIP 01810These 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.41
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.99
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.90

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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.0%
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.37,155
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,160 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$155,617
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$207,356
Average tempThe average temperature here across a full year.48°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

20 Walnut Ave 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 65% of homes in Essex County
  • Has a smaller lot than 91% of homes in Andover 01810
  • Older than 88% of homes in Andover 01810

How it measures up in Andover 01810

The dot is this home. The mark in the middle is the typical home in Andover 01810.

Living area2,232 ft²
SmallerTypical 2,456 ft²Bigger

Bigger than 41% of homes nearby

Lot size0.24 ac
SmallerTypical 0.76 acBigger

Bigger than 9% of homes nearby

Year built1918
OlderTypical 1969Newer

Newer than 12% of homes nearby

How 20 Walnut Ave ranks against every home in each area.
MeasureThis homeAndover 01810Essex County
Living areabigger than2,232 ft²41% of homes65% of homes
Lot sizebigger than0.24 ac9% of homes48% of homes
Year builtnewer than191812% of homes26% of homes

About 20 Walnut Ave

When did 20 Walnut Ave, Andover, MA last sell?

20 Walnut Ave, Andover, MA last sold on Dec 31, 2025 for $899,900, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 20 Walnut Ave, Andover, MA?

20 Walnut Ave, Andover, MA has 4 bedrooms, 2 bathrooms, 2,232 square feet of living space and a 0.24-acre lot.

When was 20 Walnut Ave, Andover, MA built?

20 Walnut Ave, Andover, MA was built in 1918, making it 108 years old. It is a duplex single home. The building has 2 stories.

What schools serve 20 Walnut Ave, Andover, MA?

20 Walnut Ave, Andover, MA is assigned to West Middle School (middle), rated A-; Andover High School (high), rated A+; Bancroft Elementary School (elementary), rated A. All sit in Andover School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Walnut Ave, Andover, MA compare to other homes in Andover 01810?

Among the 11,074 homes in Andover 01810, it is bigger than 41% of them (2,232 ft² against a typical 2,456 ft²), its lot is bigger than 9% of them (0.24 ac against a typical 0.76 ac) and it is newer than 12% of them (1918 against a typical 1969). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 20 Walnut Ave, Andover, MA?

The 2025 property tax bill for 20 Walnut Ave, Andover, MA was $10,547. The county assessed it at $844,400.

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