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Single Family ResidenceResidential
$205,228$249 / 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 84How 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 $145,000 on Nov 8, 2005

521 PATAPSCO AVE

BALTIMORE, MD 21237
1
Baths
824 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.
0.1 ac
Lot SizeThe size of the land the home sits on, from county records.
1942
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$205K
$172K low$238K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$145,000 · Nov 8, 2005

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,221 (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.$133,300 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$123,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$143,000

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
CountyBaltimore
Lot (acres)The size of the land the home sits on, from county records.0.10
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 88 ft²Shed · 200 ft²

Transaction History(2)

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
Red House Run Elementary SchoolC-
Elementary · Grades PK–5 · 1.7 mi
H
Overlea High SchoolD-
High · Grades 9–12 · 2.7 mi
M
Nottingham Middle SchoolD-
Middle · Grades 6–8 · 3.7 mi

District: Baltimore County Public Schools

Neighborhood · ZIP 21237These 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.92
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.44

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.17%
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.1.0%
PopulationHow many people live in this area.31,022
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,671 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,346
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$107,623
Average tempThe average temperature here across a full year.56°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

521 Patapsco Ave 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 92% of homes in Rosedale 21237
  • Costs more per square foot than 82% of homes in Rosedale 21237
  • Among the smallest homes in Rosedale 21237
  • Has a smaller lot than 69% of homes in Rosedale 21237
  • Older than 92% of homes in Rosedale 21237

What homes are worth in Rosedale 21237

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

This home
$168K$620K

This home is worth more than 8% of homes in Rosedale 21237.

How it measures up in Rosedale 21237

The dot is this home. The mark in the middle is the typical home in Rosedale 21237.

Estimated value$205,228
CheaperTypical $311,393Pricier

Pricier than 8% of homes nearby

Price per ft²$249
CheaperTypical $214Pricier

Pricier than 82% of homes nearby

Living area824 ft²
SmallerTypical 1,364 ft²Bigger

Smaller than almost all homes nearby

Lot size0.1 ac
SmallerTypical 0.16 acBigger

Bigger than 31% of homes nearby

Year built1942
OlderTypical 1978Newer

Newer than 8% of homes nearby

How 521 Patapsco Ave ranks against every home in each area.
MeasureThis homeRosedale 21237Baltimore County
Estimated valuepricier than$205,2288% of homes10% of homes
Price per ft²pricier than$24982% of homes62% of homes
Living areabigger than824 ft²almost no homes2% of homes
Lot sizebigger than0.1 ac31% of homes33% of homes
Year builtnewer than19428% of homes13% of homes

About 521 Patapsco Ave

How much is 521 Patapsco Ave, Baltimore, MD worth?

The TopHap Estimate for 521 Patapsco Ave, Baltimore, MD is $205,228 as of Sep 24, 2026. The likely range is $172,153 to $238,303. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 521 Patapsco Ave, Baltimore, MD last sell?

521 Patapsco Ave, Baltimore, MD last sold on Nov 8, 2005 for $145,000, according to the county's recorded deed.

How big is 521 Patapsco Ave, Baltimore, MD?

521 Patapsco Ave, Baltimore, MD has 1 bathrooms, 824 square feet of living space and a 0.10-acre lot.

When was 521 Patapsco Ave, Baltimore, MD built?

521 Patapsco Ave, Baltimore, MD was built in 1942, making it 84 years old. It is a conventional home. The building has 1 story.

What schools serve 521 Patapsco Ave, Baltimore, MD?

521 Patapsco Ave, Baltimore, MD is assigned to Red House Run Elementary School (elementary), rated C-; Overlea High School (high), rated D-; Nottingham Middle School (middle), rated D-. All sit in Baltimore County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 Patapsco Ave, Baltimore, MD compare to other homes in Rosedale 21237?

Among the 9,177 homes in Rosedale 21237, it is worth more than 8% of them ($205,228 against a typical $311,393), its price per square foot is higher than 82% of them ($249 against a typical $214), it is bigger than almost none of them (824 ft² against a typical 1,364 ft²), its lot is bigger than 31% of them (0.1 ac against a typical 0.16 ac) and it is newer than 8% of them (1942 against a typical 1978). Measured against all of Baltimore County, it is worth more than 10% 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 521 Patapsco Ave, Baltimore, MD?

The 2025 property tax bill for 521 Patapsco Ave, Baltimore, MD was $2,221. The county assessed it at $133,300.

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