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Single Family ResidenceResidential
$240,025$160 / 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 67How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $98,900 on Dec 30, 2016

21 BACK RIVER LN

FRIENDSHIP, ME 04547
3
Beds
1.5
Baths
1,498 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.
1.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1967
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$240K
$161K low$319K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$98,900 · Dec 30, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,723 (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.$164,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$74,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$90,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$102,400

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.A-Frame
CountyKNOX
Lot (acres)The size of the land the home sits on, from county records.1.14
ConstructionThe main material the home's frame and walls are built from.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
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
Friendship Village SchoolA
Elementary · Grades KG–6 · 1.4 mi
M
Medomak Middle SchoolB-
Middle · Grades 7–8 · 8.5 mi
H
Medomak Valley High SchoolC+
High · Grades 9–12 · 8.6 mi

District: School Administrative District 40

Neighborhood · ZIP 04547These 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.126
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.76
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.54

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.60%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.7%
PopulationHow many people live in this area.1,259
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.47 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,078
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$95,049
Average tempThe average temperature here across a full year.45°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

21 Back River Ln 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 78% of homes in Knox County
  • Costs less per square foot than 91% of homes in Knox County
  • Smaller than 80% of homes in Friendship 04547

What homes are worth in Friendship 04547

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

This home
$111K$887K

This home is worth more than 24% of homes in Friendship 04547.

How it measures up in Friendship 04547

The dot is this home. The mark in the middle is the typical home in Friendship 04547.

Estimated value$240,025
CheaperTypical $337,668Pricier

Pricier than 24% of homes nearby

Price per ft²$160
CheaperTypical $145Pricier

Pricier than 59% of homes nearby

Living area1,498 ft²
SmallerTypical 2,469 ft²Bigger

Bigger than 20% of homes nearby

Lot size1.14 ac
SmallerTypical 1.32 acBigger

Bigger than 45% of homes nearby

Year built1967
OlderTypical 1970Newer

Newer than 49% of homes nearby

How 21 Back River Ln ranks against every home in each area.
MeasureThis homeFriendship 04547Knox County
Estimated valuepricier than$240,02524% of homes22% of homes
Price per ft²pricier than$16059% of homes9% of homes
Living areabigger than1,498 ft²20% of homes49% of homes
Lot sizebigger than1.14 ac45% of homes49% of homes
Year builtnewer than196749% of homes42% of homes

About 21 Back River Ln

How much is 21 Back River Ln, Friendship, ME worth?

The TopHap Estimate for 21 Back River Ln, Friendship, ME is $240,025 as of Aug 30, 2026. The likely range is $161,316 to $318,734. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Back River Ln, Friendship, ME last sell?

21 Back River Ln, Friendship, ME last sold on Dec 30, 2016 for $98,900, according to the county's recorded deed.

How big is 21 Back River Ln, Friendship, ME?

21 Back River Ln, Friendship, ME has 3 bedrooms, 1.5 bathrooms, 1,498 square feet of living space and a 1.14-acre lot.

When was 21 Back River Ln, Friendship, ME built?

21 Back River Ln, Friendship, ME was built in 1967, making it 59 years old. It is a a-frame home. The building has 1 story.

What schools serve 21 Back River Ln, Friendship, ME?

21 Back River Ln, Friendship, ME is assigned to Friendship Village School (elementary), rated A; Medomak Middle School (middle), rated B-; Medomak Valley High School (high), rated C+. All sit in School Administrative District 40. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Back River Ln, Friendship, ME compare to other homes in Friendship 04547?

Among the 877 homes in Friendship 04547, it is worth more than 24% of them ($240,025 against a typical $337,668), its price per square foot is higher than 59% of them ($160 against a typical $145), it is bigger than 20% of them (1,498 ft² against a typical 2,469 ft²), its lot is bigger than 45% of them (1.14 ac against a typical 1.32 ac) and it is newer than 49% of them (1967 against a typical 1970). Measured against all of Knox County, it is worth more than 22% 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 Back River Ln, Friendship, ME?

The 2025 property tax bill for 21 Back River Ln, Friendship, ME was $1,723. The county assessed it at $164,900.

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