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Single Family ResidenceResidential
$1,400,258$286 / 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 94How 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 $1,355,000 on Sep 30, 2025

4037 HOLLY KNOLL DR

GLEN ARM, MD 21057
4 / 2
Baths
4,890 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.
1.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1982
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.4M
$1.3M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,355,000 · Sep 30, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,214 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$885,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$199,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$685,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$849,333
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$885,300

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.1.24
ConstructionThe main material the home's frame and walls are built from.Brick
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.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 728 ft²Porch · 480 ft²

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
Carroll Manor Elementary SchoolA+
Elementary · Grades PK–5 · 0.9 mi
H
Dulaney High SchoolB-
High · Grades 9–12 · 4.7 mi
M
Cockeysville Middle SchoolB-
Middle · Grades 6–8 · 5.4 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

4037 Holly Knoll Dr 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.

  • Among the most valuable homes in Glen Arm 21057
  • Costs more per square foot than 80% of homes in Baltimore County
  • Among the largest homes in Baltimore County
  • Has a bigger lot than 91% of homes in Baltimore County
  • Newer than 77% of homes in Glen Arm 21057

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
$299K$1.2M

This home is worth more than almost all 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$1,400,258
CheaperTypical $638,091Pricier

Pricier than almost all homes nearby

Price per ft²$286
CheaperTypical $261Pricier

Pricier than 68% of homes nearby

Living area4,890 ft²
SmallerTypical 2,388 ft²Bigger

Bigger than 97% of homes nearby

Lot size1.24 ac
SmallerTypical 1.51 acBigger

Bigger than 38% of homes nearby

Year built1982
OlderTypical 1969Newer

Newer than 77% of homes nearby

How 4037 Holly Knoll Dr ranks against every home in each area.
MeasureThis homeGlen Arm 21057Baltimore County
Estimated valuepricier than$1,400,258almost all homesalmost all homes
Price per ft²pricier than$28668% of homes80% of homes
Living areabigger than4,890 ft²97% of homesalmost all homes
Lot sizebigger than1.24 ac38% of homes91% of homes
Year builtnewer than198277% of homes65% of homes

About 4037 Holly Knoll Dr

How much is 4037 Holly Knoll Dr, Glen Arm, MD worth?

The TopHap Estimate for 4037 Holly Knoll Dr, Glen Arm, MD is $1,400,258 as of Sep 24, 2026. The likely range is $1,313,602 to $1,486,914. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4037 Holly Knoll Dr, Glen Arm, MD last sell?

4037 Holly Knoll Dr, Glen Arm, MD last sold on Sep 30, 2025 for $1,355,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 4037 Holly Knoll Dr, Glen Arm, MD?

4037 Holly Knoll Dr, Glen Arm, MD has 4 bathrooms, 4,890 square feet of living space and a 1.24-acre lot.

When was 4037 Holly Knoll Dr, Glen Arm, MD built?

4037 Holly Knoll Dr, Glen Arm, MD was built in 1982, making it 44 years old. It is a conventional home. The building has 1 story.

What schools serve 4037 Holly Knoll Dr, Glen Arm, MD?

4037 Holly Knoll Dr, Glen Arm, MD is assigned to Carroll Manor Elementary School (elementary), rated A+; Dulaney High School (high), rated B-; Cockeysville Middle School (middle), rated B-. All sit in Baltimore County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4037 Holly Knoll Dr, 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 almost all of them ($1,400,258 against a typical $638,091), its price per square foot is higher than 68% of them ($286 against a typical $261), it is bigger than 97% of them (4,890 ft² against a typical 2,388 ft²), its lot is bigger than 38% of them (1.24 ac against a typical 1.51 ac) and it is newer than 77% of them (1982 against a typical 1969). Measured against all of Baltimore County, it is worth more than almost all 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 4037 Holly Knoll Dr, Glen Arm, MD?

The 2024 property tax bill for 4037 Holly Knoll Dr, Glen Arm, MD was $10,214. The county assessed it at $885,300.

More homes on Holly Knoll Dr

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Assigned schools

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