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Single Family ResidenceResidential
$360,581$221 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $280,000 on Apr 22, 2020

4142 BLACK ROCK RD

HAMPSTEAD, MD 21074
1.5
Baths
1,630 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.
0.37 ac
Lot SizeThe size of the land the home sits on, from county records.
1947
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

$361K
$345K low$377K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$280,000 · Apr 22, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,371 (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.$318,700 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$293,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$369,100

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyCARROLL
Lot (acres)The size of the land the home sits on, from county records.0.37
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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, Basement
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 · 132 ft²Patio · 132 ft²Porch · 288 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
Shiloh Middle SchoolB
Middle · Grades 6–8 · 0.8 mi
E
Spring Garden Elementary SchoolB
Elementary · Grades PK–5 · 1.0 mi
H
Manchester Valley High SchoolA-
High · Grades 9–12 · 3.7 mi

District: Carroll County Public Schools

Neighborhood · ZIP 21074These 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.94
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.45

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.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.9%
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.16,114
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.408 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$108,515
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$132,821
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%

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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

4142 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 77% of homes in Carroll County
  • Costs less per square foot than 82% of homes in Carroll County
  • Has a smaller lot than 65% of homes in Carroll County
  • Older than 89% of homes in Hampstead 21074

What homes are worth in Hampstead 21074

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

This home
$201K$853K

This home is worth more than 36% of homes in Hampstead 21074.

How it measures up in Hampstead 21074

The dot is this home. The mark in the middle is the typical home in Hampstead 21074.

Estimated value$360,581
CheaperTypical $408,930Pricier

Pricier than 36% of homes nearby

Price per ft²$221
CheaperTypical $256Pricier

Pricier than 19% of homes nearby

Living area1,630 ft²
SmallerTypical 1,664 ft²Bigger

Bigger than 49% of homes nearby

Lot size0.37 ac
SmallerTypical 0.61 acBigger

Bigger than 39% of homes nearby

Year built1947
OlderTypical 1985Newer

Newer than 11% of homes nearby

How 4142 Black Rock Rd ranks against every home in each area.
MeasureThis homeHampstead 21074Carroll County
Estimated valuepricier than$360,58136% of homes23% of homes
Price per ft²pricier than$22119% of homes18% of homes
Living areabigger than1,630 ft²49% of homes42% of homes
Lot sizebigger than0.37 ac39% of homes35% of homes
Year builtnewer than194711% of homes12% of homes

About 4142 Black Rock Rd

How much is 4142 Black Rock Rd, Hampstead, MD worth?

The TopHap Estimate for 4142 Black Rock Rd, Hampstead, MD is $360,581 as of Aug 30, 2026. The likely range is $344,624 to $376,538. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4142 Black Rock Rd, Hampstead, MD last sell?

4142 Black Rock Rd, Hampstead, MD last sold on Apr 22, 2020 for $280,000, according to the county's recorded deed.

How big is 4142 Black Rock Rd, Hampstead, MD?

4142 Black Rock Rd, Hampstead, MD has 1.5 bathrooms, 1,630 square feet of living space and a 0.37-acre lot.

When was 4142 Black Rock Rd, Hampstead, MD built?

4142 Black Rock Rd, Hampstead, MD was built in 1947, making it 79 years old. The building has 1 story.

What schools serve 4142 Black Rock Rd, Hampstead, MD?

4142 Black Rock Rd, Hampstead, MD is assigned to Shiloh Middle School (middle), rated B; Spring Garden Elementary School (elementary), rated B; Manchester Valley High School (high), rated A-. All sit in Carroll County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4142 Black Rock Rd, Hampstead, MD compare to other homes in Hampstead 21074?

Among the 5,648 homes in Hampstead 21074, it is worth more than 36% of them ($360,581 against a typical $408,930), its price per square foot is higher than 19% of them ($221 against a typical $256), it is bigger than 49% of them (1,630 ft² against a typical 1,664 ft²), its lot is bigger than 39% of them (0.37 ac against a typical 0.61 ac) and it is newer than 11% of them (1947 against a typical 1985). Measured against all of Carroll County, it is worth more than 23% 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 4142 Black Rock Rd, Hampstead, MD?

The 2025 property tax bill for 4142 Black Rock Rd, Hampstead, MD was $3,371. The county assessed it at $318,700.

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