Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential

948 Main St

WALTHAM, MA 02451
1.41 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.
1
StoriesHow many floors the home has above ground.
Built 20163 floors24 units719–1,415 ft²
$9.5M
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.
$452K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$570
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-3.2%vs the Waltham ZIP median sale $/ft² ($589)

Sales Performance

$396K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
-22.4%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
3
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
12.5%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+2.7%per yeartypical hold 4.5 yrsfrom 5 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20162017201920202021202220252026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20162017201920202021202220252026

20 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.
$398K$501K$605K$708K719 ft²858 ft²997 ft²1,137 ft²1,276 ft²1,415 ft²
1 bd2 bd
1 bed
21 units
2 bed
3 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.
1 bd · 1 ba · 777 ft²
3 units
1 bd · 1 ba · 719 ft²
2 units
1 bd · 1 ba · 733 ft²
2 units
1 bd · 1 ba · 761 ft²
2 units
1 bd · 1 ba · 782 ft²
2 units
1 bd · 1 ba · 813 ft²
2 units
One-off layouts
11 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.

$398K–$435K
4 units
$444K–$468K
11 units
$483K–$502K
2 units
$519K–$519K
1 unit
$627K–$627K
1 unit
$708K–$708K
1 unit

Value by Floor & LineAverage estimated price per square foot by floor range, using unit numbers to infer floors. Higher floors usually price higher — the gap shows how much the view is worth here.

Floor 1
$543/ft²
Floor 2
$563/ft²
Floor 3
$575/ft²
Unit lines by $/ft²Condo units stacked vertically share a unit line — the last digits of the unit number (like 05 in 1205, 1305, 1405). Lines share a layout and exposure, so comparing estimated $/ft² by line shows which position in the building commands a premium.
Line ·04
$599/ft²
Line ·02
$583/ft²
Line ·00
$573/ft²
Line ·01
$567/ft²

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.83%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.8%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.8.1 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.22%
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.50%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$451,821
Median tax billThe middle annual property tax bill among the building's units.$4,098
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.1

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

Unit 209Feb 27, 2026$500,000Unit 105Jan 28, 2026$396,000Unit 105Oct 3, 2025$335,000Unit 204May 20, 2025$510,000Unit 208Aug 2, 2024$430,000Unit 102Apr 25, 2024$447,900Unit 207Feb 25, 2022$440,000Unit 300Oct 28, 2021$420,000Unit 206Oct 22, 2021$400,000Unit 305May 15, 2020$420,000

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

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.47
57
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.20 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
ConstructionThe main material the home's frame and walls are built from.Steel Frame
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

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 · 0.6 mi
M
John W. McDevitt Middle SchoolB
Middle · Grades 6–8 · 0.9 mi
H
Waltham Sr High SchoolC
High · Grades 9–12 · 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%

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.

948 Main St # 100
1 bd · 1 ba · 748 ft²
$451K
948 Main St # 101
2 bd · 1 ba · 1,415 ft²
$708K
948 Main St # 102
1 bd · 1 ba · 762 ft²
$456K
948 Main St # 103
2 bd · 1 ba · 1,308 ft²
$627K
948 Main St # 104
1 bd · 1 ba · 875 ft²
$483K
948 Main St # 105
1 bd · 1 ba · 777 ft²
$398K
948 Main St # 106
1 bd · 1 ba · 780 ft²
$435K
948 Main St # 200
1 bd · 1 ba · 813 ft²
$444K
948 Main St # 201
1 bd · 1 ba · 719 ft²
$444K
948 Main St # 202
1 bd · 1 ba · 782 ft²
$445K
948 Main St # 203
1 bd · 1 ba · 733 ft²
948 Main St # 204
1 bd · 1 ba · 778 ft²
$519K
948 Main St # 205
1 bd · 1 ba · 761 ft²
948 Main St # 206
1 bd · 1 ba · 777 ft²
$444K
948 Main St # 207
1 bd · 1 ba · 877 ft²
$468K
948 Main St # 208
1 bd · 1 ba · 776 ft²
$445K
948 Main St # 209
2 bd · 1 ba · 1,171 ft²
$502K
948 Main St # 300
1 bd · 1 ba · 813 ft²
$464K
948 Main St # 301
1 bd · 1 ba · 719 ft²
$421K
948 Main St # 302
1 bd · 1 ba · 782 ft²
$453K
948 Main St # 303
1 bd · 1 ba · 733 ft²
948 Main St # 304
1 bd · 1 ba · 783 ft²
$454K
948 Main St # 305
1 bd · 1 ba · 761 ft²
$425K
948 Main St # 306
1 bd · 1 ba · 777 ft²

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

About 948 Main St

How many units are in 948 Main St, Waltham, MA?

948 Main St, Waltham, MA has 24 residential units across 3 floors, built in 2016, according to county assessor records.

What is a unit at 948 Main St, Waltham, MA worth?

The median TopHap Estimate across the 24 units at 948 Main St, Waltham, MA is $451,772. That works out to $570 per square foot. Units run from 719 to 1,415 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 948 Main St, Waltham, MA expensive for Waltham?

Units at 948 Main St, Waltham, MA carry a median of $570 per square foot, 3% below the Waltham median of $589 per square foot.

How often do units sell at 948 Main St, Waltham, MA?

3 units at 948 Main St, Waltham, MA sold in the last 12 months, out of 20 recorded arms-length sales all time. That is a turnover rate of 12.5% of the building per year. The median sale over that period was $396K.

Have units at 948 Main St, Waltham, MA appreciated?

Across 5 repeat sales of the same unit, 948 Main St, Waltham, MA returned a median 2.7% 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 4.5 years.

What floor plans does 948 Main St, Waltham, MA have?

The most common plan at 948 Main St, Waltham, MA is a 1-bedroom of 777 square feet, repeated 3 times, with a median estimate of $420,986. TopHap identifies 6 recurring plans in the building.

More homes on Main St

Closest homes

More homes in Waltham 02451

Assigned schools

Explore the area

See this home in context

Open 948 Main 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