Skip to content
Skip to content
TopHapOpen in map
Airport & RelatedPublic Works
Last sold for $7,600,000 on Aug 30, 2022

3501 FROG MORTAR RD

MIDDLE RIVER, MD 21220
0
Baths
6,455 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.
8.61 ac
Lot SizeThe size of the land the home sits on, from county records.
1960
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$7,600,000 · Aug 30, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$27,269 (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.$2,141,767 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2,141,767
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,141,900

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.75 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.Airport & Related
CountyBaltimore
Lot (acres)The size of the land the home sits on, from county records.8.61
ConstructionThe main material the home's frame and walls are built from.Brick
HeatingThe type of heating system in the home.Forced Air
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.Boat access

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.

E
Seneca Elementary SchoolC-
Elementary · Grades PK–5 · 0.6 mi
M
Stemmers Run Middle SchoolD
Middle · Grades 6–8 · 3.2 mi
H
Kenwood High SchoolD-
High · Grades 9–12 · 3.5 mi

District: Baltimore County Public Schools

Neighborhood · ZIP 21220These 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.107
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.95
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.48

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.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
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.43,388
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,388 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,236
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$102,046
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

3501 Frog Mortar 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.

  • Among the largest homes in Middle River 21220
  • Among the largest lots in Middle River 21220

How it measures up in Middle River 21220

The dot is this home. The mark in the middle is the typical home in Middle River 21220.

Living area6,455 ft²
SmallerTypical 1,410 ft²Bigger

Bigger than almost all homes nearby

Lot size8.61 ac
SmallerTypical 0.13 acBigger

Bigger than almost all homes nearby

Year built1960
OlderTypical 1980Newer

Newer than 40% of homes nearby

How 3501 Frog Mortar Rd ranks against every home in each area.
MeasureThis homeMiddle River 21220Baltimore County
Living areabigger than6,455 ft²almost all homesalmost all homes
Lot sizebigger than8.61 acalmost all homesalmost all homes
Year builtnewer than196040% of homes45% of homes

About 3501 Frog Mortar Rd

When did 3501 Frog Mortar Rd, Middle River, MD last sell?

3501 Frog Mortar Rd, Middle River, MD last sold on Aug 30, 2022 for $7,600,000, according to the county's recorded deed.

How big is 3501 Frog Mortar Rd, Middle River, MD?

3501 Frog Mortar Rd, Middle River, MD has 6,455 square feet of living space and a 8.61-acre lot.

When was 3501 Frog Mortar Rd, Middle River, MD built?

3501 Frog Mortar Rd, Middle River, MD was built in 1960, making it 66 years old. The building has 1 story.

What schools serve 3501 Frog Mortar Rd, Middle River, MD?

3501 Frog Mortar Rd, Middle River, MD is assigned to Seneca Elementary School (elementary), rated C-; Stemmers Run Middle School (middle), rated D; Kenwood High School (high), rated D-. All sit in Baltimore County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3501 Frog Mortar Rd, Middle River, MD compare to other homes in Middle River 21220?

Among the 13,087 homes in Middle River 21220, it is bigger than almost all of them (6,455 ft² against a typical 1,410 ft²), its lot is bigger than almost all of them (8.61 ac against a typical 0.13 ac) and it is newer than 40% of them (1960 against a typical 1980). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 3501 Frog Mortar Rd, Middle River, MD?

The 2025 property tax bill for 3501 Frog Mortar Rd, Middle River, MD was $27,269. The county assessed it at $2,141,767.

Closest homes

More homes in Middle River 21220

Assigned schools

Explore the area

See this home in context

Open 3501 Frog Mortar Rd on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map