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Single Family ResidenceResidential
$428,119$320 / 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 93How 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 $375,500 on Mar 13, 2023

21 DOROTHY ST

PORTLAND, ME 04103
3
Beds
2
Baths
1,339 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1913
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$428K
$400K low$456K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$375,500 · Mar 13, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,827 (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.$402,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$120,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$282,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$299,600

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyCUMBERLAND
Lot (acres)The size of the land the home sits on, from county records.0.19
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(4)

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
Gerald E Talbot Community SchoolD
Elementary · Grades PK–5 · 0.5 mi
H
Casco Bay High SchoolC+
High · Grades 9–12 · 0.7 mi
M
Lincoln Middle SchoolB-
Middle · Grades 6–8 · 1.0 mi

District: Portland

Neighborhood · ZIP 04103These 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.83
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.86

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.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.31,898
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,948 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$84,945
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$108,429
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.46 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

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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 Dorothy 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 86% of homes in Portland 04103
  • Costs less per square foot than 88% of homes in Portland 04103
  • Has a smaller lot than 80% of homes in Cumberland County
  • Older than 92% of homes in Riverton

What homes are worth in Portland 04103

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

This home
$356K$1.2M

This home is worth more than 14% of homes in Portland 04103.

How it measures up in Portland 04103

The dot is this home. The mark in the middle is the typical home in Portland 04103.

Estimated value$428,119
CheaperTypical $562,425Pricier

Pricier than 14% of homes nearby

Price per ft²$320
CheaperTypical $408Pricier

Pricier than 12% of homes nearby

Living area1,339 ft²
SmallerTypical 1,512 ft²Bigger

Bigger than 38% of homes nearby

Lot size0.19 ac
SmallerTypical 0.19 acBigger

Bigger than 50% of homes nearby

Year built1913
OlderTypical 1954Newer

Newer than 18% of homes nearby

How 21 Dorothy St ranks against every home in each area.
MeasureThis homeRivertonPortland 04103Cumberland County
Estimated valuepricier than$428,11925% of homes14% of homes20% of homes
Price per ft²pricier than$32022% of homes12% of homes23% of homes
Living areabigger than1,339 ft²55% of homes38% of homes39% of homes
Lot sizebigger than0.19 ac47% of homes50% of homes20% of homes
Year builtnewer than19138% of homes18% of homes13% of homes

About 21 Dorothy St

How much is 21 Dorothy St, Portland, ME worth?

The TopHap Estimate for 21 Dorothy St, Portland, ME is $428,119 as of Sep 24, 2026. The likely range is $400,167 to $456,071. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Dorothy St, Portland, ME last sell?

21 Dorothy St, Portland, ME last sold on Mar 13, 2023 for $375,500, according to the county's recorded deed.

How big is 21 Dorothy St, Portland, ME?

21 Dorothy St, Portland, ME has 3 bedrooms, 2 bathrooms, 1,339 square feet of living space and a 0.19-acre lot.

When was 21 Dorothy St, Portland, ME built?

21 Dorothy St, Portland, ME was built in 1913, making it 113 years old. The building has 1 story.

What schools serve 21 Dorothy St, Portland, ME?

21 Dorothy St, Portland, ME is assigned to Gerald E Talbot Community School (elementary), rated D; Casco Bay High School (high), rated C+; Lincoln Middle School (middle), rated B-. All sit in Portland. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Dorothy St, Portland, ME compare to other homes in Portland 04103?

Among the 9,383 homes in Portland 04103, it is worth more than 14% of them ($428,119 against a typical $562,425), its price per square foot is higher than 12% of them ($320 against a typical $408), it is bigger than 38% of them (1,339 ft² against a typical 1,512 ft²), its lot is bigger than 50% of them (0.19 ac against a typical 0.19 ac) and it is newer than 18% of them (1913 against a typical 1954). Measured against all of Cumberland County, it is worth more than 20% 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 Dorothy St, Portland, ME?

The 2025 property tax bill for 21 Dorothy St, Portland, ME was $4,827. The county assessed it at $402,900.

More homes on Dorothy St

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Assigned schools

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