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CondominiumResidential
$1,010,622$432 / 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 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $865,000 on Oct 15, 2021

20 RICH ST

WALTHAM, MA 02451
Building report
3
Beds
3 / 2
Baths
2,340 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
2016
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1M
$932K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$865,000 · Oct 15, 2021
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$445,622
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$356,498
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.58%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$565,000
GUARANTEED RATE INC · P · recorded Oct 15, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,756 (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.$891,700 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$891,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$991,705

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.44
41
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
59
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
89
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
32
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.8 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
CountyMIDDLESEX
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
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

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
Thomas R Plympton Elementary SchoolC
Elementary · Grades KG–5 · 0.4 mi
H
Waltham Sr High SchoolC
High · Grades 9–12 · 1.5 mi
M
John F. Kennedy Middle SchoolA-
Middle · Grades 6–8 · 1.6 mi

District: Waltham School District

Neighborhood · ZIP 02451These 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.84
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.105
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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.16,966
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,036 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,384
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$156,140
Average tempThe average temperature here across a full year.49°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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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 Rich 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 more than 92% of homes in Bank Square
  • Costs less per square foot than 73% of homes in Bank Square
  • Bigger than 74% of homes in Waltham 02451
  • Has a smaller lot than 81% of homes in Middlesex County
  • Newer than 98% of homes in Bank Square

What homes are worth in Waltham 02451

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

This home
$324K$1.5M

This home is worth more than 83% of homes in Waltham 02451.

How it measures up in Waltham 02451

The dot is this home. The mark in the middle is the typical home in Waltham 02451.

Estimated value$1,010,622
CheaperTypical $780,267Pricier

Pricier than 83% of homes nearby

Price per ft²$432
CheaperTypical $467Pricier

Pricier than 34% of homes nearby

Living area2,340 ft²
SmallerTypical 1,778 ft²Bigger

Bigger than 74% of homes nearby

Lot size0.13 ac
SmallerTypical 0.18 acBigger

Bigger than 32% of homes nearby

Year built2016
OlderTypical 1957Newer

Newer than 97% of homes nearby

How 20 Rich St ranks against every home in each area.
MeasureThis homeBank SquareWaltham 02451Middlesex County
Estimated valuepricier than$1,010,62292% of homes83% of homes71% of homes
Price per ft²pricier than$43227% of homes34% of homes41% of homes
Living areabigger than2,340 ft²64% of homes74% of homes69% of homes
Lot sizebigger than0.13 ac36% of homes32% of homes19% of homes
Year builtnewer than201698% of homes97% of homes97% of homes

About 20 Rich St

How much is 20 Rich St, Waltham, MA worth?

The TopHap Estimate for 20 Rich St, Waltham, MA is $1,010,622 as of Jul 14, 2026. The likely range is $932,455 to $1,088,789. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Rich St, Waltham, MA last sell?

20 Rich St, Waltham, MA last sold on Oct 15, 2021 for $865,000, according to the county's recorded deed.

How big is 20 Rich St, Waltham, MA?

20 Rich St, Waltham, MA has 3 bedrooms, 3 bathrooms and 2,340 square feet of living space.

When was 20 Rich St, Waltham, MA built?

20 Rich St, Waltham, MA was built in 2016, making it 10 years old. The building has 2 stories.

What schools serve 20 Rich St, Waltham, MA?

20 Rich St, Waltham, MA is assigned to Thomas R Plympton Elementary School (elementary), rated C; Waltham Sr High School (high), rated C; John F. Kennedy Middle School (middle), rated A-. All sit in Waltham School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Rich St, Waltham, MA compare to other homes in Waltham 02451?

Among the 4,967 homes in Waltham 02451, it is worth more than 83% of them ($1,010,622 against a typical $780,267), its price per square foot is higher than 34% of them ($432 against a typical $467), it is bigger than 74% of them (2,340 ft² against a typical 1,778 ft²), its lot is bigger than 32% of them (0.13 ac against a typical 0.18 ac) and it is newer than 97% of them (2016 against a typical 1957). Measured against all of Middlesex County, it is worth more than 71% 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 Rich St, Waltham, MA?

The 2025 property tax bill for 20 Rich St, Waltham, MA was $8,756. The county assessed it at $891,700.

More homes on Rich St

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Assigned schools

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