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Single Family ResidenceResidential
$344,110$173 / 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 78How 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

21 CLARENDON ST

ROCKLAND, ME 04841
3
Beds
1.5
Baths
1,991 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.
0.32 ac
Lot SizeThe size of the land the home sits on, from county records.
1880
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

$344K
$269K low$419K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,892 (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.$415,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$149,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$266,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$236,400

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
CountyKNOX
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.1969
Lot (acres)The size of the land the home sits on, from county records.0.32
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
South SchoolC+
Elementary · Grades KG–5 · 0.4 mi
H
Oceanside High SchoolD
High · Grades 9–12 · 1.4 mi
M
Oceanside Middle SchoolB-
Middle · Grades 6–8 · 4.0 mi

District: Regional School Unit 13

Neighborhood · ZIP 04841These 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.135
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.80
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.50

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.88%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.17%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.6,960
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.526 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$53,416
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$65,512
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.50 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

21 Clarendon 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 70% of homes in Knox County
  • Costs less per square foot than 92% of homes in Knox County
  • Bigger than 78% of homes in Rockland 04841
  • Has a smaller lot than 81% of homes in Knox County
  • Older than 88% of homes in Knox County

What homes are worth in Rockland 04841

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

This home
$161K$871K

This home is worth more than 46% of homes in Rockland 04841.

How it measures up in Rockland 04841

The dot is this home. The mark in the middle is the typical home in Rockland 04841.

Estimated value$344,110
CheaperTypical $354,249Pricier

Pricier than 46% of homes nearby

Price per ft²$173
CheaperTypical $254Pricier

Pricier than 10% of homes nearby

Living area1,991 ft²
SmallerTypical 1,458 ft²Bigger

Bigger than 78% of homes nearby

Lot size0.32 ac
SmallerTypical 0.27 acBigger

Bigger than 59% of homes nearby

Year built1880
OlderTypical 1924Newer

Newer than 23% of homes nearby

How 21 Clarendon St ranks against every home in each area.
MeasureThis homeRockland 04841Knox County
Estimated valuepricier than$344,11046% of homes30% of homes
Price per ft²pricier than$17310% of homes8% of homes
Living areabigger than1,991 ft²78% of homes72% of homes
Lot sizebigger than0.32 ac59% of homes19% of homes
Year builtnewer than188023% of homes12% of homes

About 21 Clarendon St

How much is 21 Clarendon St, Rockland, ME worth?

The TopHap Estimate for 21 Clarendon St, Rockland, ME is $344,110 as of Sep 24, 2026. The likely range is $268,829 to $419,391. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Clarendon St, Rockland, ME last sell?

21 Clarendon St, Rockland, ME last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Clarendon St, Rockland, ME?

21 Clarendon St, Rockland, ME has 3 bedrooms, 1.5 bathrooms, 1,991 square feet of living space and a 0.32-acre lot.

When was 21 Clarendon St, Rockland, ME built?

21 Clarendon St, Rockland, ME was built in 1880, making it 146 years old. It is a conventional home. The building has 2 stories.

What schools serve 21 Clarendon St, Rockland, ME?

21 Clarendon St, Rockland, ME is assigned to South School (elementary), rated C+; Oceanside High School (high), rated D; Oceanside Middle School (middle), rated B-. All sit in Regional School Unit 13. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Clarendon St, Rockland, ME compare to other homes in Rockland 04841?

Among the 2,704 homes in Rockland 04841, it is worth more than 46% of them ($344,110 against a typical $354,249), its price per square foot is higher than 10% of them ($173 against a typical $254), it is bigger than 78% of them (1,991 ft² against a typical 1,458 ft²), its lot is bigger than 59% of them (0.32 ac against a typical 0.27 ac) and it is newer than 23% of them (1880 against a typical 1924). Measured against all of Knox County, it is worth more than 30% 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 Clarendon St, Rockland, ME?

The 2025 property tax bill for 21 Clarendon St, Rockland, ME was $6,892. The county assessed it at $415,700.

More homes on Clarendon St

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