Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,272,042$221 / 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 97How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $1,000,000 on Jan 30, 2023

55 FLAGG RD

SOUTHBOROUGH, MA 01772
4
Beds
3 / 2
Baths
5,756 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.
1.41 ac
Lot SizeThe size of the land the home sits on, from county records.
1700
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.3M
$1.2M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,000,000 · Jan 30, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,253 (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.$1,176,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$306,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$870,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,111,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,262,645

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyWORCESTER
Lot (acres)The size of the land the home sits on, from county records.1.41
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
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(10)

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.

M
P Brent TrottierA-
Middle · Grades 6–8 · 0.8 mi
E
Mary E Finn School
Elementary · Grades PK–1 · 1.8 mi
H
Algonquin Regional High SchoolA
High · Grades 9–12 · 3.6 mi

District: Southborough School District

Neighborhood · ZIP 01772These 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.32
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.63

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.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.10,867
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.705 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$180,666
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$225,158
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.48 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.50%

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

55 Flagg Rd 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.

  • Among the most valuable homes in Worcester County
  • Among the lowest price per square foot in Southborough 01772
  • Among the largest homes in Worcester County
  • Has a bigger lot than 77% of homes in Worcester County
  • Among the oldest homes in Southborough 01772

What homes are worth in Southborough 01772

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

This home
$490K$2.2M

This home is worth more than 77% of homes in Southborough 01772.

How it measures up in Southborough 01772

The dot is this home. The mark in the middle is the typical home in Southborough 01772.

Estimated value$1,272,042
CheaperTypical $953,236Pricier

Pricier than 77% of homes nearby

Price per ft²$221
CheaperTypical $412Pricier

Cheaper than almost all homes nearby

Living area5,756 ft²
SmallerTypical 2,447 ft²Bigger

Bigger than 98% of homes nearby

Lot size1.41 ac
SmallerTypical 1 acBigger

Bigger than 75% of homes nearby

Year built1700
OlderTypical 1985Newer

Older than almost all homes nearby

How 55 Flagg Rd ranks against every home in each area.
MeasureThis homeSouthborough 01772Worcester County
Estimated valuepricier than$1,272,04277% of homesalmost all homes
Price per ft²pricier than$221almost no homes10% of homes
Living areabigger than5,756 ft²98% of homesalmost all homes
Lot sizebigger than1.41 ac75% of homes77% of homes
Year builtnewer than1700almost no homesalmost no homes

About 55 Flagg Rd

How much is 55 Flagg Rd, Southborough, MA worth?

The TopHap Estimate for 55 Flagg Rd, Southborough, MA is $1,272,042 as of Sep 24, 2026. The likely range is $1,235,344 to $1,308,740. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 55 Flagg Rd, Southborough, MA last sell?

55 Flagg Rd, Southborough, MA last sold on Jan 30, 2023 for $1,000,000, according to the county's recorded deed.

How big is 55 Flagg Rd, Southborough, MA?

55 Flagg Rd, Southborough, MA has 4 bedrooms, 3 bathrooms, 5,756 square feet of living space and a 1.41-acre lot.

When was 55 Flagg Rd, Southborough, MA built?

55 Flagg Rd, Southborough, MA was built in 1700, making it 326 years old. The building has 3 stories.

What schools serve 55 Flagg Rd, Southborough, MA?

55 Flagg Rd, Southborough, MA is assigned to P Brent Trottier (middle), rated A-; Mary E Finn School (elementary); Algonquin Regional High School (high), rated A. All sit in Southborough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 55 Flagg Rd, Southborough, MA compare to other homes in Southborough 01772?

Among the 3,253 homes in Southborough 01772, it is worth more than 77% of them ($1,272,042 against a typical $953,236), its price per square foot is higher than almost none of them ($221 against a typical $412), it is bigger than 98% of them (5,756 ft² against a typical 2,447 ft²), its lot is bigger than 75% of them (1.41 ac against a typical 1 ac) and it is newer than almost none of them (1700 against a typical 1985). Measured against all of Worcester County, it is worth more than almost all 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 55 Flagg Rd, Southborough, MA?

The 2025 property tax bill for 55 Flagg Rd, Southborough, MA was $16,253. The county assessed it at $1,176,900.

More homes on Flagg Rd

Closest homes

More homes in Southborough 01772

Assigned schools

Explore the area

See this home in context

Open 55 Flagg Rd 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