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Single Family ResidenceResidential
$474,939$436 / 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 Jul 14, 2026

400 ARMSTRONG LN

BALTIMORE, MD 21221
1
Baths
1,090 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.
0.36 ac
Lot SizeThe size of the land the home sits on, from county records.
1934
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

$475K
$442K low$508K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,991 (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.$376,300 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$344,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$407,700

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.52 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.1 percent flood zone

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.0.36
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.Garage, Detached
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.Deck · 650 ft²Shed · 220 ft²Boat access

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
Middleborough Elementary SchoolB
Elementary · Grades PK–5 · 0.6 mi
H
Chesapeake High SchoolD+
High · Grades 9–12 · 0.7 mi
M
Deep Creek Middle SchoolC-
Middle · Grades 6–8 · 1.6 mi

District: Baltimore County Public Schools

Neighborhood · ZIP 21221These 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.123
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.12%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.42,396
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,898 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$76,330
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$89,410
Average tempThe average temperature here across a full year.56°F
Annual precipHow much rain and melted snow falls here in a typical year.45 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

400 Armstrong 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 87% of homes in Essex 21221
  • Among the highest price per square foot in Essex 21221
  • Smaller than 84% of homes in Baltimore County
  • Has a bigger lot than 86% of homes in Essex 21221
  • Older than 92% of homes in Baltimore County

What homes are worth in Essex 21221

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

This home
$144K$715K

This home is worth more than 87% of homes in Essex 21221.

How it measures up in Essex 21221

The dot is this home. The mark in the middle is the typical home in Essex 21221.

Estimated value$474,939
CheaperTypical $283,994Pricier

Pricier than 87% of homes nearby

Price per ft²$436
CheaperTypical $210Pricier

Pricier than almost all homes nearby

Living area1,090 ft²
SmallerTypical 1,240 ft²Bigger

Bigger than 29% of homes nearby

Lot size0.36 ac
SmallerTypical 0.16 acBigger

Bigger than 86% of homes nearby

Year built1934
OlderTypical 1957Newer

Newer than 10% of homes nearby

How 400 Armstrong Ln ranks against every home in each area.
MeasureThis homeEssex 21221Baltimore County
Estimated valuepricier than$474,93987% of homes72% of homes
Price per ft²pricier than$436almost all homesalmost all homes
Living areabigger than1,090 ft²29% of homes16% of homes
Lot sizebigger than0.36 ac86% of homes78% of homes
Year builtnewer than193410% of homes8% of homes

About 400 Armstrong Ln

How much is 400 Armstrong Ln, Baltimore, MD worth?

The TopHap Estimate for 400 Armstrong Ln, Baltimore, MD is $474,939 as of Jul 14, 2026. The likely range is $441,544 to $508,334. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 400 Armstrong Ln, Baltimore, MD last sell?

400 Armstrong Ln, Baltimore, MD last sold on Jun 14, 2024, according to the county's recorded deed.

How big is 400 Armstrong Ln, Baltimore, MD?

400 Armstrong Ln, Baltimore, MD has 1 bathrooms, 1,090 square feet of living space and a 0.36-acre lot.

When was 400 Armstrong Ln, Baltimore, MD built?

400 Armstrong Ln, Baltimore, MD was built in 1934, making it 92 years old. It is a conventional home. The building has 1 story.

What schools serve 400 Armstrong Ln, Baltimore, MD?

400 Armstrong Ln, Baltimore, MD is assigned to Middleborough Elementary School (elementary), rated B; Chesapeake High School (high), rated D+; Deep Creek 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 400 Armstrong Ln, Baltimore, MD compare to other homes in Essex 21221?

Among the 12,677 homes in Essex 21221, it is worth more than 87% of them ($474,939 against a typical $283,994), its price per square foot is higher than almost all of them ($436 against a typical $210), it is bigger than 29% of them (1,090 ft² against a typical 1,240 ft²), its lot is bigger than 86% of them (0.36 ac against a typical 0.16 ac) and it is newer than 10% of them (1934 against a typical 1957). Measured against all of Baltimore County, it is worth more than 72% 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 400 Armstrong Ln, Baltimore, MD?

The 2025 property tax bill for 400 Armstrong Ln, Baltimore, MD was $5,991. The county assessed it at $376,300.

More homes on Armstrong Ln

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More homes in Baltimore 21221

Assigned schools

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