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Single Family ResidenceResidential
$434,978$300 / 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 89How 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 $420,000 on May 12, 2025

821 UNION ST

ROCKLAND, MA 02370
1.5
Baths
1,448 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
1824
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$435K
$389K low$481K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$420,000 · May 12, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,028 (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.$441,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$216,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$224,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$396,340

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
CountyPLYMOUTH
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.1968
Lot (acres)The size of the land the home sits on, from county records.0.29
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.Steam
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.

H
Rockland High SchoolC-
High · Grades 9–12 · 1.1 mi
M
John W. Rodgers Middle SchoolC-
Middle · Grades 5–8 · 1.1 mi
E
Phelps Elementary SchoolB
Elementary · Grades 1–4 · 1.5 mi

District: Rockland School District

Neighborhood · ZIP 02370These 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.82
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.95
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.70

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.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.18,041
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,810 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$95,099
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$121,368
Average tempThe average temperature here across a full year.50°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.52%

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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

821 Union 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 88% of homes in Rockland 02370
  • Costs less per square foot than 85% of homes in Plymouth County
  • Smaller than 65% of homes in Plymouth County
  • Has a smaller lot than 65% of homes in Plymouth County
  • Among the oldest homes in Rockland 02370

What homes are worth in Rockland 02370

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

This home
$250K$898K

This home is worth more than 12% of homes in Rockland 02370.

How it measures up in Rockland 02370

The dot is this home. The mark in the middle is the typical home in Rockland 02370.

Estimated value$434,978
CheaperTypical $540,021Pricier

Pricier than 12% of homes nearby

Price per ft²$300
CheaperTypical $358Pricier

Pricier than 20% of homes nearby

Living area1,448 ft²
SmallerTypical 1,574 ft²Bigger

Bigger than 41% of homes nearby

Lot size0.29 ac
SmallerTypical 0.35 acBigger

Bigger than 39% of homes nearby

Year built1824
OlderTypical 1957Newer

Older than almost all homes nearby

How 821 Union St ranks against every home in each area.
MeasureThis homeRockland 02370Plymouth County
Estimated valuepricier than$434,97812% of homes13% of homes
Price per ft²pricier than$30020% of homes15% of homes
Living areabigger than1,448 ft²41% of homes35% of homes
Lot sizebigger than0.29 ac39% of homes35% of homes
Year builtnewer than1824almost no homesalmost no homes

About 821 Union St

How much is 821 Union St, Rockland, MA worth?

The TopHap Estimate for 821 Union St, Rockland, MA is $434,978 as of Sep 24, 2026. The likely range is $389,301 to $480,655. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 821 Union St, Rockland, MA last sell?

821 Union St, Rockland, MA last sold on May 12, 2025 for $420,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 821 Union St, Rockland, MA?

821 Union St, Rockland, MA has 1.5 bathrooms, 1,448 square feet of living space and a 0.29-acre lot.

When was 821 Union St, Rockland, MA built?

821 Union St, Rockland, MA was built in 1824, making it 202 years old. It is a conventional home. The building has 2 stories.

What schools serve 821 Union St, Rockland, MA?

821 Union St, Rockland, MA is assigned to Rockland High School (high), rated C-; John W. Rodgers Middle School (middle), rated C-; Phelps Elementary School (elementary), rated B. All sit in Rockland School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 821 Union St, Rockland, MA compare to other homes in Rockland 02370?

Among the 5,262 homes in Rockland 02370, it is worth more than 12% of them ($434,978 against a typical $540,021), its price per square foot is higher than 20% of them ($300 against a typical $358), it is bigger than 41% of them (1,448 ft² against a typical 1,574 ft²), its lot is bigger than 39% of them (0.29 ac against a typical 0.35 ac) and it is newer than almost none of them (1824 against a typical 1957). Measured against all of Plymouth County, it is worth more than 13% 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 821 Union St, Rockland, MA?

The 2025 property tax bill for 821 Union St, Rockland, MA was $6,028. The county assessed it at $441,000.

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