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Single Family ResidenceResidential
$364,588$316 / 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 90How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $350,000 on May 20, 2025

8310 KARL AVE

ROSEDALE, MD 21237
1.5
Baths
1,152 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1952
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$365K
$330K low$399K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$350,000 · May 20, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,234 (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.$187,067 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$174,133
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$200,000

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

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.0.21
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
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(3)

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 · 0.3 mi
H
Overlea High SchoolD
High · Grades 9–12 · 1.4 mi
M
Nottingham Middle School
Middle · Grades 6–8 · 2.8 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

8310 Karl 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 73% of homes in Rosedale 21237
  • Costs more per square foot than 98% of homes in Rosedale 21237
  • Smaller than 77% of homes in Baltimore County
  • Has a bigger lot than 69% of homes in Rosedale 21237
  • Older than 83% 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
$170K$621K

This home is worth more than 73% 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$364,588
CheaperTypical $313,358Pricier

Pricier than 73% of homes nearby

Price per ft²$316
CheaperTypical $218Pricier

Pricier than 98% of homes nearby

Living area1,152 ft²
SmallerTypical 1,344 ft²Bigger

Bigger than 25% of homes nearby

Lot size0.21 ac
SmallerTypical 0.16 acBigger

Bigger than 69% of homes nearby

Year built1952
OlderTypical 1978Newer

Newer than 17% of homes nearby

How 8310 Karl Ave ranks against every home in each area.
MeasureThis homeRosedale 21237Baltimore County
Estimated valuepricier than$364,58873% of homes51% of homes
Price per ft²pricier than$31698% of homes88% of homes
Living areabigger than1,152 ft²25% of homes23% of homes
Lot sizebigger than0.21 ac69% of homes62% of homes
Year builtnewer than195217% of homes24% of homes

About 8310 Karl Ave

How much is 8310 Karl Ave, Rosedale, MD worth?

The TopHap Estimate for 8310 Karl Ave, Rosedale, MD is $364,588 as of Jul 14, 2026. The likely range is $329,922 to $399,254. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 8310 Karl Ave, Rosedale, MD last sell?

8310 Karl Ave, Rosedale, MD last sold on May 20, 2025 for $350,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 8310 Karl Ave, Rosedale, MD?

8310 Karl Ave, Rosedale, MD has 1.5 bathrooms, 1,152 square feet of living space and a 0.21-acre lot.

When was 8310 Karl Ave, Rosedale, MD built?

8310 Karl Ave, Rosedale, MD was built in 1952, making it 74 years old. It is a conventional home. The building has 1 story.

What schools serve 8310 Karl Ave, Rosedale, MD?

8310 Karl 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 8310 Karl Ave, Rosedale, MD compare to other homes in Rosedale 21237?

Among the 9,171 homes in Rosedale 21237, it is worth more than 73% of them ($364,588 against a typical $313,358), its price per square foot is higher than 98% of them ($316 against a typical $218), it is bigger than 25% of them (1,152 ft² against a typical 1,344 ft²), its lot is bigger than 69% of them (0.21 ac against a typical 0.16 ac) and it is newer than 17% of them (1952 against a typical 1978). Measured against all of Baltimore County, it is worth more than 51% 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 8310 Karl Ave, Rosedale, MD?

The 2025 property tax bill for 8310 Karl Ave, Rosedale, MD was $1,234. The county assessed it at $187,067.

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