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CondominiumResidential

428 Great Rd

ACTON, MA 01720
2.66 ac
Lot SizeThe size of the land the home sits on, from county records.
1968
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 196818 units280–600 ft²
$3.5M
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.
$206K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$345
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-16.1%vs the Acton ZIP median sale $/ft² ($411)

Sales Performance

$165K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
5.6%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+3.5%per yeartypical hold 5.9 yrsfrom 21 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19881994199720012004201120192025
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19881994199720012004201120192025

37 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.
$154K$174K$193K$213K280 ft²344 ft²408 ft²472 ft²536 ft²600 ft²
Studio1 bd2 bd
Studio
1 unit
1 bed
5 units
2 bed
12 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 · 1.5 ba · 600 ft²
12 units
1 bd · 1.5 ba · 545 ft²
3 units
1 bd · 1.5 ba · 530 ft²
2 units
One-off layouts
1 unit

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.

$154K–$154K
1 unit
$170K–$170K
1 unit
$182K–$182K
2 units
$183K–$185K
3 units
$204K–$205K
2 units
$206K–$213K
9 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.33%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.0%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.23.1 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.50%
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.52%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$220,384
Median tax billThe middle annual property tax bill among the building's units.$3,036
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 10Dec 8, 2025$165,000Unit 2Nov 15, 2022$176,500Unit 9Mar 12, 2020$131,000Unit 1Jan 25, 2019$139,900Unit 5Jul 2, 2018$143,300Unit 4May 15, 2013$34,500Unit 5Jan 26, 2011$60,000Unit 14Aug 4, 2006$131,000Unit 5May 26, 2005$130,000Unit 2Sep 27, 2004$112,000

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

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.10 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
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.0.2 percent flood zone

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
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

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Luther Conant Elementary SchoolA+
Elementary · Grades KG–6 · 2.5 mi
H
Acton - Boxborough Regional High SchoolA+
High · Grades 9–12 · 2.8 mi
M
R. J. Grey Junior High SchoolA+
Middle · Grades 7–8 · 2.9 mi

District: Acton-Boxborough School District

Neighborhood · ZIP 01720These 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.71
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 100.72

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.24,473
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,210 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$148,952
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$187,397
Average tempThe average temperature here across a full year.48°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.

428 Great Rd # 1
2 bd · 1.5 ba · 600 ft²
$209K
428 Great Rd
2 bd · 1.5 ba · 600 ft²
$211K
428 Great Rd # 3
1 bd · 1.5 ba · 545 ft²
$182K
428 Great Rd
1.5 ba · 280 ft²
$154K
428 Great Rd # 5
2 bd · 1.5 ba · 600 ft²
$212K
428 Great Rd # 6
2 bd · 1.5 ba · 600 ft²
$208K
428 Great Rd # 7
2 bd · 1.5 ba · 600 ft²
$213K
428 Great Rd
2 bd · 1.5 ba · 600 ft²
$205K
428 Great Rd # 9
1 bd · 1.5 ba · 545 ft²
$184K
428 Great Rd # 10
1 bd · 1.5 ba · 530 ft²
$170K
428 Great Rd # 11
2 bd · 1.5 ba · 600 ft²
$208K
428 Great Rd # 12
2 bd · 1.5 ba · 600 ft²
$204K
428 Great Rd # 13
2 bd · 1.5 ba · 600 ft²
$207K
428 Great Rd # 14
2 bd · 1.5 ba · 600 ft²
$207K
428 Great Rd # 15
1 bd · 1.5 ba · 545 ft²
$182K
428 Great Rd # 16
1 bd · 1.5 ba · 530 ft²
$183K
428 Great Rd # 17
2 bd · 1.5 ba · 600 ft²
$206K
428 Great Rd # 18
2 bd · 1.5 ba · 600 ft²
$185K

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

About 428 Great Rd

How many units are in 428 Great Rd, Acton, MA?

428 Great Rd, Acton, MA has 18 residential units across built in 1968, according to county assessor records.

What is a unit at 428 Great Rd, Acton, MA worth?

The median TopHap Estimate across the 18 units at 428 Great Rd, Acton, MA is $205,765. That works out to $345 per square foot. Units run from 280 to 600 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 428 Great Rd, Acton, MA expensive for Acton?

Units at 428 Great Rd, Acton, MA carry a median of $345 per square foot, 16% below the Acton median of $411 per square foot.

How often do units sell at 428 Great Rd, Acton, MA?

1 units at 428 Great Rd, Acton, MA sold in the last 12 months, out of 37 recorded arms-length sales all time. That is a turnover rate of 5.6% of the building per year. The median sale over that period was $165K.

Have units at 428 Great Rd, Acton, MA appreciated?

Across 21 repeat sales of the same unit, 428 Great Rd, Acton, 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 5.9 years.

What floor plans does 428 Great Rd, Acton, MA have?

The most common plan at 428 Great Rd, Acton, MA is a 2-bedroom of 600 square feet, repeated 12 times, with a median estimate of $207,421. TopHap identifies 3 recurring plans in the building.

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