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Single Family ResidenceResidential
$559,423$421 / 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 93How 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 $222,000 on May 22, 2002

18 GUNPOWDER RD

GLEN ARM, MD 21057
3 / 1
Baths
1,330 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.
1.31 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$559K
$520K low$599K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$222,000 · May 22, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,269 (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.$480,867 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$436,333
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$525,400

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.22 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.1.31
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.Forced Air
CoolingThe type of cooling or air conditioning in the home.Yes
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.Carport (Unspecified)
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.Patio · 300 ft²

Transaction History(1)

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.

M
Pine Grove Middle SchoolD+
Middle · Grades 6–8 · 1.7 mi
H
Loch Raven High SchoolC-
High · Grades 9–12 · 2.6 mi
E
Carroll Manor Elementary SchoolA
Elementary · Grades KG–5 · 4.7 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%

Owner Tools

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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

18 Gunpowder Rd 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 Baltimore County
  • Among the highest price per square foot in Baltimore County
  • Smaller than 92% of homes in Glen Arm 21057
  • Has a bigger lot than 91% of homes in Baltimore County
  • Older than 73% 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
$290K$1.1M

This home is worth more than 34% 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$559,423
CheaperTypical $635,525Pricier

Pricier than 34% of homes nearby

Price per ft²$421
CheaperTypical $261Pricier

Pricier than 98% of homes nearby

Living area1,330 ft²
SmallerTypical 2,380 ft²Bigger

Bigger than 8% of homes nearby

Lot size1.31 ac
SmallerTypical 1.52 acBigger

Bigger than 42% of homes nearby

Year built1956
OlderTypical 1969Newer

Newer than 27% of homes nearby

How 18 Gunpowder Rd ranks against every home in each area.
MeasureThis homeGlen Arm 21057Baltimore County
Estimated valuepricier than$559,42334% of homes81% of homes
Price per ft²pricier than$42198% of homesalmost all homes
Living areabigger than1,330 ft²8% of homes38% of homes
Lot sizebigger than1.31 ac42% of homes91% of homes
Year builtnewer than195627% of homes37% of homes

About 18 Gunpowder Rd

How much is 18 Gunpowder Rd, Glen Arm, MD worth?

The TopHap Estimate for 18 Gunpowder Rd, Glen Arm, MD is $559,423 as of Sep 24, 2026. The likely range is $520,007 to $598,839. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Gunpowder Rd, Glen Arm, MD last sell?

18 Gunpowder Rd, Glen Arm, MD last sold on May 22, 2002 for $222,000, according to the county's recorded deed.

How big is 18 Gunpowder Rd, Glen Arm, MD?

18 Gunpowder Rd, Glen Arm, MD has 3 bathrooms, 1,330 square feet of living space and a 1.31-acre lot.

When was 18 Gunpowder Rd, Glen Arm, MD built?

18 Gunpowder Rd, Glen Arm, MD was built in 1956, making it 70 years old. It is a conventional home. The building has 1 story.

What schools serve 18 Gunpowder Rd, Glen Arm, MD?

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

How does 18 Gunpowder Rd, 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 34% of them ($559,423 against a typical $635,525), its price per square foot is higher than 98% of them ($421 against a typical $261), it is bigger than 8% of them (1,330 ft² against a typical 2,380 ft²), its lot is bigger than 42% of them (1.31 ac against a typical 1.52 ac) and it is newer than 27% of them (1956 against a typical 1969). Measured against all of Baltimore County, it is worth more than 81% 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 18 Gunpowder Rd, Glen Arm, MD?

The 2025 property tax bill for 18 Gunpowder Rd, Glen Arm, MD was $4,269. The county assessed it at $480,867.

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