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Single Family ResidenceResidential
$353,761$324 / 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 83How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $43,000 on Jul 16, 1984

18 FLAGG ST

BOYLSTON, MA 01505
4
Beds
1
Baths
1,092 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.
0.39 ac
Lot SizeThe size of the land the home sits on, from county records.
1920
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.

Valuation

$354K
$293K low$415K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$43,000 · Jul 16, 1984

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,083 (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.$295,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$146,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$148,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$290,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$411,255

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyWORCESTER
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.1973
Lot (acres)The size of the land the home sits on, from county records.0.39
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

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.

E
Boylston Elementary SchoolB+
Elementary · Grades KG–5 · 1.5 mi
M
Tahanto Regional High SchoolA
Middle · Grades 6–12 · 4.5 mi

District: Berlin-Boylston School District

Neighborhood · ZIP 01505These 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.43
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.65

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.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.3%
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.4,451
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.262 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,631
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$161,917
Average tempThe average temperature here across a full year.47°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%

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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

18 Flagg 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 less than 98% of homes in Boylston 01505
  • Smaller than 93% of homes in Boylston 01505
  • Has a smaller lot than 85% of homes in Boylston 01505
  • Older than 94% of homes in Boylston 01505

What homes are worth in Boylston 01505

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

This home
$355K$1.6M

This home is worth more than 2% of homes in Boylston 01505.

How it measures up in Boylston 01505

The dot is this home. The mark in the middle is the typical home in Boylston 01505.

Estimated value$353,761
CheaperTypical $638,628Pricier

Pricier than 2% of homes nearby

Price per ft²$324
CheaperTypical $339Pricier

Pricier than 38% of homes nearby

Living area1,092 ft²
SmallerTypical 1,904 ft²Bigger

Bigger than 7% of homes nearby

Lot size0.39 ac
SmallerTypical 1.18 acBigger

Bigger than 15% of homes nearby

Year built1920
OlderTypical 1977Newer

Newer than 6% of homes nearby

How 18 Flagg St ranks against every home in each area.
MeasureThis homeBoylston 01505Worcester County
Estimated valuepricier than$353,7612% of homes17% of homes
Price per ft²pricier than$32438% of homes61% of homes
Living areabigger than1,092 ft²7% of homes14% of homes
Lot sizebigger than0.39 ac15% of homes42% of homes
Year builtnewer than19206% of homes20% of homes

About 18 Flagg St

How much is 18 Flagg St, Boylston, MA worth?

The TopHap Estimate for 18 Flagg St, Boylston, MA is $353,761 as of Oct 21, 2026. The likely range is $292,951 to $414,571. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Flagg St, Boylston, MA last sell?

18 Flagg St, Boylston, MA last sold on Jul 16, 1984 for $43,000, according to the county's recorded deed.

How big is 18 Flagg St, Boylston, MA?

18 Flagg St, Boylston, MA has 4 bedrooms, 1 bathrooms, 1,092 square feet of living space and a 0.39-acre lot.

When was 18 Flagg St, Boylston, MA built?

18 Flagg St, Boylston, MA was built in 1920, making it 106 years old. It is a conventional home. The building has 2 stories.

What schools serve 18 Flagg St, Boylston, MA?

18 Flagg St, Boylston, MA is assigned to Boylston Elementary School (elementary), rated B+; Tahanto Regional High School (middle), rated A. All sit in Berlin-Boylston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Flagg St, Boylston, MA compare to other homes in Boylston 01505?

Among the 1,864 homes in Boylston 01505, it is worth more than 2% of them ($353,761 against a typical $638,628), its price per square foot is higher than 38% of them ($324 against a typical $339), it is bigger than 7% of them (1,092 ft² against a typical 1,904 ft²), its lot is bigger than 15% of them (0.39 ac against a typical 1.18 ac) and it is newer than 6% of them (1920 against a typical 1977). Measured against all of Worcester County, it is worth more than 17% 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 18 Flagg St, Boylston, MA?

The 2025 property tax bill for 18 Flagg St, Boylston, MA was $4,083. The county assessed it at $295,200.

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