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Single Family ResidenceResidential
$422,629$290 / 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 87How 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

3812 BLACK ROCK RD

UPPERCO, MD 21155
1
Baths
1,456 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.
2.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$423K
$370K low$476K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$422,629
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$338,103

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,652 (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.$251,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$113,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$138,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$248,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$251,800

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.2.46
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.Yes
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, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Fifth District Elementary SchoolA
Elementary · Grades KG–5 · 1.7 mi
H
Hereford High SchoolA+
High · Grades 9–12 · 6.6 mi
M
Hereford Middle SchoolA
Middle · Grades 6–8 · 6.8 mi

District: Baltimore County Public Schools

Neighborhood · ZIP 21155These 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.66
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.43

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
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.2,841
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.130 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$113,439
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$154,298
Average tempThe average temperature here across a full year.53°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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

3812 Black Rock 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 less than 66% of homes in Upperco 21155
  • Costs more per square foot than 79% of homes in Baltimore County
  • Smaller than 73% of homes in Upperco 21155
  • Has a bigger lot than 95% of homes in Baltimore County

What homes are worth in Upperco 21155

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

This home
$250K$1.4M

This home is worth more than 34% of homes in Upperco 21155.

How it measures up in Upperco 21155

The dot is this home. The mark in the middle is the typical home in Upperco 21155.

Estimated value$422,629
CheaperTypical $497,750Pricier

Pricier than 34% of homes nearby

Price per ft²$290
CheaperTypical $263Pricier

Pricier than 67% of homes nearby

Living area1,456 ft²
SmallerTypical 1,972 ft²Bigger

Bigger than 27% of homes nearby

Lot size2.46 ac
SmallerTypical 1.71 acBigger

Bigger than 60% of homes nearby

How 3812 Black Rock Rd ranks against every home in each area.
MeasureThis homeUpperco 21155Baltimore County
Estimated valuepricier than$422,62934% of homes63% of homes
Price per ft²pricier than$29067% of homes79% of homes
Living areabigger than1,456 ft²27% of homes50% of homes
Lot sizebigger than2.46 ac60% of homes95% of homes

About 3812 Black Rock Rd

How much is 3812 Black Rock Rd, Upperco, MD worth?

The TopHap Estimate for 3812 Black Rock Rd, Upperco, MD is $422,629 as of Jul 14, 2026. The likely range is $369,677 to $475,581. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3812 Black Rock Rd, Upperco, MD last sell?

3812 Black Rock Rd, Upperco, MD last sold on Aug 24, 1999, according to the county's recorded deed.

How big is 3812 Black Rock Rd, Upperco, MD?

3812 Black Rock Rd, Upperco, MD has 1 bathrooms, 1,456 square feet of living space and a 2.46-acre lot.

What schools serve 3812 Black Rock Rd, Upperco, MD?

3812 Black Rock Rd, Upperco, MD is assigned to Fifth District Elementary School (elementary), rated A; Hereford High School (high), rated A+; Hereford Middle School (middle), rated A. All sit in Baltimore County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3812 Black Rock Rd, Upperco, MD compare to other homes in Upperco 21155?

Among the 991 homes in Upperco 21155, it is worth more than 34% of them ($422,629 against a typical $497,750), its price per square foot is higher than 67% of them ($290 against a typical $263), it is bigger than 27% of them (1,456 ft² against a typical 1,972 ft²) and its lot is bigger than 60% of them (2.46 ac against a typical 1.71 ac). Measured against all of Baltimore County, it is worth more than 63% 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 3812 Black Rock Rd, Upperco, MD?

The 2025 property tax bill for 3812 Black Rock Rd, Upperco, MD was $2,652. The county assessed it at $251,800.

Closest homes

More homes in Upperco 21155

Assigned schools

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