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Single Family ResidenceResidential
$1,193,107$228 / 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 88How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $554,000 on Jun 28, 2005

21 UNION ST

ROCKLAND, MA 02370
4
Beds
3.5
Baths
5,232 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.
0.67 ac
Lot SizeThe size of the land the home sits on, from county records.
1850
Year BuiltThe year the home was originally built, according to county records.
2
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

$1.2M
$1M 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.$554,000 · Jun 28, 2005
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$409,187
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$327,350
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.65%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$443,920
SOVEREIGN BANK · recorded Jun 28, 2005
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$340,000
ROCKLAND TRUST CO

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$18,772 (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.$1,373,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$227,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,145,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,049,655

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.Historical
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.1985
Lot (acres)The size of the land the home sits on, from county records.0.67
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(11)

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
Phelps Elementary SchoolB
Elementary · Grades 1–4 · 0.1 mi
H
Rockland High SchoolC-
High · Grades 9–12 · 0.4 mi
M
John W. Rodgers Middle SchoolC-
Middle · Grades 5–8 · 0.4 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

21 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.

  • Among the most valuable homes in Rockland 02370
  • Costs less per square foot than 98% of homes in Rockland 02370
  • Among the largest homes in Rockland 02370
  • Has a bigger lot than 72% of homes in Rockland 02370
  • Older than 98% of homes in Plymouth County

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
$234K$857K

This home is worth more than almost all 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$1,193,107
CheaperTypical $530,822Pricier

Pricier than almost all homes nearby

Price per ft²$228
CheaperTypical $351Pricier

Pricier than 2% of homes nearby

Living area5,232 ft²
SmallerTypical 1,574 ft²Bigger

Bigger than almost all homes nearby

Lot size0.67 ac
SmallerTypical 0.35 acBigger

Bigger than 72% of homes nearby

Year built1850
OlderTypical 1957Newer

Newer than 3% of homes nearby

How 21 Union St ranks against every home in each area.
MeasureThis homeRockland 02370Plymouth County
Estimated valuepricier than$1,193,107almost all homes90% of homes
Price per ft²pricier than$2282% of homes2% of homes
Living areabigger than5,232 ft²almost all homesalmost all homes
Lot sizebigger than0.67 ac72% of homes61% of homes
Year builtnewer than18503% of homes2% of homes

About 21 Union St

How much is 21 Union St, Rockland, MA worth?

The TopHap Estimate for 21 Union St, Rockland, MA is $1,193,107 as of Jul 14, 2026. The likely range is $1,047,043 to $1,339,171. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Union St, Rockland, MA last sell?

21 Union St, Rockland, MA last sold on Jun 28, 2005 for $554,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 Union St, Rockland, MA?

21 Union St, Rockland, MA has 4 bedrooms, 3.5 bathrooms, 5,232 square feet of living space and a 0.67-acre lot.

When was 21 Union St, Rockland, MA built?

21 Union St, Rockland, MA was built in 1850, making it 176 years old. It is a historical home. The building has 2 stories.

What schools serve 21 Union St, Rockland, MA?

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

How does 21 Union St, Rockland, MA compare to other homes in Rockland 02370?

Among the 5,262 homes in Rockland 02370, it is worth more than almost all of them ($1,193,107 against a typical $530,822), its price per square foot is higher than 2% of them ($228 against a typical $351), it is bigger than almost all of them (5,232 ft² against a typical 1,574 ft²), its lot is bigger than 72% of them (0.67 ac against a typical 0.35 ac) and it is newer than 3% of them (1850 against a typical 1957). Measured against all of Plymouth County, it is worth more than 90% 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 21 Union St, Rockland, MA?

The 2025 property tax bill for 21 Union St, Rockland, MA was $18,772. The county assessed it at $1,373,200.

More homes on Union St

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Assigned schools

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