Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential
$560,807$401 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

20 RIVER ST

ANDOVER, MA 01810
2
Beds
2
Baths
1,399 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1843
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.

Valuation

$561K
$529K low$593K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,773 (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.$462,200 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$462,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$408,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$482,980

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.27 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyESSEX
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.Hot Water
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.

E
South Elementary SchoolA+
Elementary · Grades KG–5 · 0.4 mi
H
Andover High SchoolA
High · Grades 9–12 · 2.2 mi
M
West Middle SchoolA+
Middle · Grades 6–8 · 2.3 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%

Owner Tools

Do you own this home?
Claim this home

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 River 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 less than 86% of homes in Andover 01810
  • Smaller than 84% of homes in Andover 01810
  • Has a smaller lot than 95% of homes in Andover 01810
  • Older than 98% of homes in Andover 01810

What homes are worth in Andover 01810

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

This home
$299K$2.3M

This home is worth more than 14% 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.

Estimated value$560,807
CheaperTypical $952,338Pricier

Pricier than 14% of homes nearby

Price per ft²$401
CheaperTypical $391Pricier

Pricier than 54% of homes nearby

Living area1,399 ft²
SmallerTypical 2,465 ft²Bigger

Bigger than 16% of homes nearby

Lot size0.2 ac
SmallerTypical 0.76 acBigger

Bigger than 5% of homes nearby

Year built1843
OlderTypical 1969Newer

Newer than 2% of homes nearby

How 20 River St ranks against every home in each area.
MeasureThis homeAndover 01810Essex County
Estimated valuepricier than$560,80714% of homes28% of homes
Price per ft²pricier than$40154% of homes49% of homes
Living areabigger than1,399 ft²16% of homes28% of homes
Lot sizebigger than0.2 ac5% of homes36% of homes
Year builtnewer than18432% of homes3% of homes

About 20 River St

How much is 20 River St, Andover, MA worth?

The TopHap Estimate for 20 River St, Andover, MA is $560,807 as of Oct 21, 2026. The likely range is $528,778 to $592,836. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 River St, Andover, MA last sell?

20 River St, Andover, MA last sold on Aug 6, 2018, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 20 River St, Andover, MA?

20 River St, Andover, MA has 2 bedrooms, 2 bathrooms and 1,399 square feet of living space.

When was 20 River St, Andover, MA built?

20 River St, Andover, MA was built in 1843, making it 183 years old. It is a condo/apartment home. The building has 2 stories.

What schools serve 20 River St, Andover, MA?

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

How does 20 River St, Andover, MA compare to other homes in Andover 01810?

Among the 11,074 homes in Andover 01810, it is worth more than 14% of them ($560,807 against a typical $952,338), its price per square foot is higher than 54% of them ($401 against a typical $391), it is bigger than 16% of them (1,399 ft² against a typical 2,465 ft²), its lot is bigger than 5% of them (0.2 ac against a typical 0.76 ac) and it is newer than 2% of them (1843 against a typical 1969). Measured against all of Essex County, it is worth more than 28% 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 20 River St, Andover, MA?

The 2025 property tax bill for 20 River St, Andover, MA was $5,773. The county assessed it at $462,200.

More homes on River St

Closest homes

More homes in Andover 01810

Assigned schools

Explore the area

See this home in context

Open 20 River St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map