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Single Family ResidenceResidential
$230,214$295 / 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 77How 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 $225,000 on Jun 21, 2022

509 PATAPSCO AVE

ROSEDALE, MD 21237
1
Baths
780 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.
4,218 ft²
Lot SizeThe size of the land the home sits on, from county records.
1950
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$230K
$178K low$282K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$225,000 · Jun 21, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,003 (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.$157,100 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$135,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$178,400

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
CountyBaltimore
Lot (acres)The size of the land the home sits on, from county records.0.10
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air
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 · 416 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 SchoolB
Elementary · Grades PK–5 · 1.7 mi
H
Overlea High SchoolD
High · Grades 9–12 · 2.8 mi
M
Nottingham Middle School
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

509 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 85% of homes in Rosedale 21237
  • Costs more per square foot than 96% 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 87% 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
$160K$614K

This home is worth more than 15% 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$230,214
CheaperTypical $305,362Pricier

Pricier than 15% of homes nearby

Price per ft²$295
CheaperTypical $211Pricier

Pricier than 96% of homes nearby

Living area780 ft²
SmallerTypical 1,360 ft²Bigger

Smaller than almost all homes nearby

Lot size4,218 ft²
SmallerTypical 0.16 acBigger

Bigger than 31% of homes nearby

Year built1950
OlderTypical 1978Newer

Newer than 13% of homes nearby

How 509 Patapsco Ave ranks against every home in each area.
MeasureThis homeRosedale 21237Baltimore County
Estimated valuepricier than$230,21415% of homes15% of homes
Price per ft²pricier than$29596% of homes83% of homes
Living areabigger than780 ft²almost no homesalmost no homes
Lot sizebigger than4,218 ft²31% of homes32% of homes
Year builtnewer than195013% of homes19% of homes

About 509 Patapsco Ave

How much is 509 Patapsco Ave, Rosedale, MD worth?

The TopHap Estimate for 509 Patapsco Ave, Rosedale, MD is $230,214 as of Aug 30, 2026. The likely range is $178,379 to $282,049. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 Patapsco Ave, Rosedale, MD last sell?

509 Patapsco Ave, Rosedale, MD last sold on Jun 21, 2022 for $225,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 509 Patapsco Ave, Rosedale, MD?

509 Patapsco Ave, Rosedale, MD has 1 bathrooms, 780 square feet of living space and a 0.10-acre lot.

When was 509 Patapsco Ave, Rosedale, MD built?

509 Patapsco Ave, Rosedale, MD was built in 1950, making it 76 years old. It is a conventional home. The building has 1 story.

What schools serve 509 Patapsco Ave, Rosedale, MD?

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

How does 509 Patapsco Ave, Rosedale, MD compare to other homes in Rosedale 21237?

Among the 9,176 homes in Rosedale 21237, it is worth more than 15% of them ($230,214 against a typical $305,362), its price per square foot is higher than 96% of them ($295 against a typical $211), it is bigger than almost none of them (780 ft² against a typical 1,360 ft²), its lot is bigger than 31% of them (4,218 ft² against a typical 0.16 ac) and it is newer than 13% of them (1950 against a typical 1978). Measured against all of Baltimore County, it is worth more than 15% 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 509 Patapsco Ave, Rosedale, MD?

The 2025 property tax bill for 509 Patapsco Ave, Rosedale, MD was $3,003. The county assessed it at $157,100.

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