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CondominiumResidential
Last sold for $365,000 on May 13, 2021

41 WALNUT ST

WALTHAM, MA 02453
0.45 ac
Lot SizeThe size of the land the home sits on, from county records.
1970
Year BuiltThe year the home was originally built, according to county records.
Built 197021 units788–1,206 ft²
$6.4M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$449K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$546
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-11.4%vs the Waltham ZIP median sale $/ft² ($616)

Sales Performance

—
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
0
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
0.0%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+3.5%per yeartypical hold 8.0 yrsfrom 24 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20082010201220152017201920212025
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20082010201220152017201920212025

47 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$422K$458K$494K$529K788 ft²872 ft²955 ft²1,039 ft²1,122 ft²1,206 ft²
2 bd
2 bed
21 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
2 bd · 1 ba · 812 ft²
12 units
2 bd · 1 ba · 788 ft²
6 units
2 bd · 1 ba · 1,206 ft²
3 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$422K–$430K
2 units
$439K–$446K
5 units
$451K–$462K
4 units
$487K–$487K
1 unit
$517K–$529K
2 units

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.71%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.19%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.8.9 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.67%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.33%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$439,415
Median tax billThe middle annual property tax bill among the building's units.$3,764
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 22Aug 15, 2025$560,000Unit 5Jun 4, 2024$390,000Unit 31May 30, 2024$415,000Unit 34Jul 16, 2021$390,000Unit 21Jun 29, 2021$420,000BuildingMay 13, 2021$365,000Unit 22May 12, 2021$500,000Unit 43Apr 30, 2021$327,000Unit 3Apr 12, 2021$325,000Unit 45Dec 18, 2020$337,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,764 (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.$383,300 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$383,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$456,570

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.13 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
CountyMIDDLESEX
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.2000
ConstructionThe main material the home's frame and walls are built from.Steel Frame
RoofThe main material covering the roof, such as asphalt shingle or tile.Roll Tar & Gravel
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(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
William F. Stanley Elementary SchoolB-
Elementary · Grades KG–5 · 0.7 mi
M
John W. McDevitt Middle SchoolB
Middle · Grades 6–8 · 0.7 mi
H
Waltham Sr High SchoolC
High · Grades 9–12 · 1.8 mi

District: Waltham School District

Neighborhood · ZIP 02453These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.73

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.94%
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.6.8%
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.32,080
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,464 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$106,981
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$136,606
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%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

41 Walnut St
2 bd · 1 ba · 812 ft²
41 Walnut St
2 bd · 1 ba · 812 ft²
$451K
41 Walnut St # 2
2 bd · 1 ba · 1,206 ft²
$517K
41 Walnut St # 3
2 bd · 1 ba · 788 ft²
$455K
41 Walnut St
2 bd · 1 ba · 812 ft²
$462K
41 Walnut St # 5
2 bd · 1 ba · 812 ft²
$430K
41 Walnut St # 21
2 bd · 1 ba · 812 ft²
$441K
41 Walnut St # 22
2 bd · 1 ba · 1,206 ft²
41 Walnut St # 23
2 bd · 1 ba · 788 ft²
41 Walnut St # 24
2 bd · 1 ba · 812 ft²
$422K
41 Walnut St # 25
2 bd · 1 ba · 1,206 ft²
$529K
41 Walnut St # 31
2 bd · 1 ba · 812 ft²
$453K
41 Walnut St # 32
2 bd · 1 ba · 812 ft²
$439K
41 Walnut St # 33
2 bd · 1 ba · 788 ft²
$487K
41 Walnut St # 34
2 bd · 1 ba · 788 ft²
41 Walnut St # 35
2 bd · 1 ba · 812 ft²
41 Walnut St # 36
2 bd · 1 ba · 812 ft²
41 Walnut St # 42
2 bd · 1 ba · 812 ft²
$440K
41 Walnut St # 43
2 bd · 1 ba · 788 ft²
41 Walnut St # 44
2 bd · 1 ba · 788 ft²
41 Walnut St # 45
2 bd · 1 ba · 812 ft²
$446K
41 Walnut St # 46
2 bd · 1 ba · 812 ft²
$445K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 41 Walnut St

How many units are in 41 Walnut St, Waltham, MA?

41 Walnut St, Waltham, MA has 21 residential units across built in 1970, according to county assessor records.

What is a unit at 41 Walnut St, Waltham, MA worth?

The median TopHap Estimate across the 21 units at 41 Walnut St, Waltham, MA is $448,638. That works out to $546 per square foot. Units run from 788 to 1,206 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 41 Walnut St, Waltham, MA expensive for Waltham?

Units at 41 Walnut St, Waltham, MA carry a median of $546 per square foot, 11% below the Waltham median of $616 per square foot.

How often do units sell at 41 Walnut St, Waltham, MA?

0 units at 41 Walnut St, Waltham, MA sold in the last 12 months, out of 47 recorded arms-length sales all time. That is a turnover rate of 0.0% of the building per year.

Have units at 41 Walnut St, Waltham, MA appreciated?

Across 24 repeat sales of the same unit, 41 Walnut St, Waltham, MA returned a median 3.5% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 8.0 years.

What floor plans does 41 Walnut St, Waltham, MA have?

The most common plan at 41 Walnut St, Waltham, MA is a 2-bedroom of 812 square feet, repeated 12 times, with a median estimate of $442,994. TopHap identifies 3 recurring plans in the building.

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