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Single Family ResidenceResidential
$693,910$184 / 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 82How 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

12100 HOOPER LN

GLEN ARM, MD 21057
2
Baths
3,772 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.
2.5 ac
Lot SizeThe size of the land the home sits on, from county records.
1892
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.

Valuation

$694K
$568K low$820K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,061 (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.$416,367 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$389,533
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$443,200

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.2.50
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Radiant
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.In-Ground Vinyl Pool
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 516 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
Carroll Manor Elementary SchoolA
Elementary · Grades KG–5 · 3.1 mi
M
Pine Grove Middle SchoolD+
Middle · Grades 6–8 · 3.9 mi
H
Loch Raven High SchoolC-
High · Grades 9–12 · 5.0 mi

District: Baltimore County Public Schools

Neighborhood · ZIP 21057These 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.74
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.47

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
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.4,918
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.295 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$156,114
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$167,405
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.47 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

12100 Hooper Ln 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 89% of homes in Baltimore County
  • Costs less per square foot than 95% of homes in Glen Arm 21057
  • Bigger than 96% of homes in Baltimore County
  • Has a bigger lot than 96% of homes in Baltimore County
  • Among the oldest homes in Baltimore County

What homes are worth in Glen Arm 21057

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

This home
$306K$1.2M

This home is worth more than 62% of homes in Glen Arm 21057.

How it measures up in Glen Arm 21057

The dot is this home. The mark in the middle is the typical home in Glen Arm 21057.

Estimated value$693,910
CheaperTypical $640,491Pricier

Pricier than 62% of homes nearby

Price per ft²$184
CheaperTypical $262Pricier

Pricier than 5% of homes nearby

Living area3,772 ft²
SmallerTypical 2,368 ft²Bigger

Bigger than 91% of homes nearby

Lot size2.5 ac
SmallerTypical 1.52 acBigger

Bigger than 71% of homes nearby

Year built1892
OlderTypical 1969Newer

Newer than 5% of homes nearby

How 12100 Hooper Ln ranks against every home in each area.
MeasureThis homeGlen Arm 21057Baltimore County
Estimated valuepricier than$693,91062% of homes89% of homes
Price per ft²pricier than$1845% of homes19% of homes
Living areabigger than3,772 ft²91% of homes96% of homes
Lot sizebigger than2.5 ac71% of homes96% of homes
Year builtnewer than18925% of homesalmost no homes

About 12100 Hooper Ln

How much is 12100 Hooper Ln, Glen Arm, MD worth?

The TopHap Estimate for 12100 Hooper Ln, Glen Arm, MD is $693,910 as of Aug 30, 2026. The likely range is $568,293 to $819,527. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 12100 Hooper Ln, Glen Arm, MD?

12100 Hooper Ln, Glen Arm, MD has 2 bathrooms, 3,772 square feet of living space and a 2.50-acre lot.

When was 12100 Hooper Ln, Glen Arm, MD built?

12100 Hooper Ln, Glen Arm, MD was built in 1892, making it 134 years old. It is a conventional home. The building has 3 stories.

What schools serve 12100 Hooper Ln, Glen Arm, MD?

12100 Hooper Ln, Glen Arm, MD is assigned to Carroll Manor Elementary School (elementary), rated A; Pine Grove Middle School (middle), rated D+; Loch Raven High School (high), rated C-. All sit in Baltimore County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12100 Hooper Ln, Glen Arm, MD compare to other homes in Glen Arm 21057?

Among the 1,461 homes in Glen Arm 21057, it is worth more than 62% of them ($693,910 against a typical $640,491), its price per square foot is higher than 5% of them ($184 against a typical $262), it is bigger than 91% of them (3,772 ft² against a typical 2,368 ft²), its lot is bigger than 71% of them (2.5 ac against a typical 1.52 ac) and it is newer than 5% of them (1892 against a typical 1969). Measured against all of Baltimore County, it is worth more than 89% 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 12100 Hooper Ln, Glen Arm, MD?

The 2025 property tax bill for 12100 Hooper Ln, Glen Arm, MD was $5,061. The county assessed it at $416,367.

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Assigned schools

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