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Residential (General/Single)Residential
$389,270
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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $455,000 on Jun 26, 2026

21 MERION AVE

ROSEDALE, MD 21237
0
Baths
2,838 ft²
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$389K
$375K low$404K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$455,000 · Jun 26, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,321 (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.$110,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$110,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$115,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$110,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Residential (General/Single)
CountyBALTIMORE
Lot (acres)The size of the land the home sits on, from county records.0.07
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Rossville Elementary SchoolB
Elementary · Grades PK–5 · 1.3 mi
H
Overlea High SchoolD-
High · Grades 9–12 · 2.5 mi
M
Parkville Middle SchoolC
Middle · Grades 6–8 · 2.6 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

21 Merion 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 more than 81% of homes in Rosedale 21237
  • Has a smaller lot than 75% 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
$156K$614K

This home is worth more than 81% 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$389,270
CheaperTypical $305,856Pricier

Pricier than 81% of homes nearby

Lot size2,838 ft²
SmallerTypical 0.16 acBigger

Bigger than 25% of homes nearby

How 21 Merion Ave ranks against every home in each area.
MeasureThis homeRosedale 21237Baltimore County
Estimated valuepricier than$389,27081% of homes58% of homes
Lot sizebigger than2,838 ft²25% of homes26% of homes

About 21 Merion Ave

How much is 21 Merion Ave, Rosedale, MD worth?

The TopHap Estimate for 21 Merion Ave, Rosedale, MD is $389,270 as of Oct 21, 2026. The likely range is $374,969 to $403,571. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Merion Ave, Rosedale, MD last sell?

21 Merion Ave, Rosedale, MD last sold on Jun 26, 2026 for $455,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

What schools serve 21 Merion Ave, Rosedale, MD?

21 Merion Ave, Rosedale, MD is assigned to Rossville Elementary School (elementary), rated B; Overlea High School (high), rated D-; Parkville Middle School (middle), rated C. All sit in Baltimore County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Merion Ave, Rosedale, MD compare to other homes in Rosedale 21237?

Among the 9,191 homes in Rosedale 21237, it is worth more than 81% of them ($389,270 against a typical $305,856) and its lot is bigger than 25% of them (2,838 ft² against a typical 0.16 ac). Measured against all of Baltimore County, it is worth more than 58% 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 Merion Ave, Rosedale, MD?

The 2025 property tax bill for 21 Merion Ave, Rosedale, MD was $1,321. The county assessed it at $110,000.

More homes on Merion Ave

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Assigned schools

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