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TownhouseResidential
$333,332$309 / 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 97How 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
Last sold for $280,000 on Dec 17, 2021

135 HOLLOW ROCK AVE

WESTMINSTER, MD 21157
1
Baths
1,080 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1948
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$333K
$324K low$342K 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 · Dec 17, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,760 (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.$275,200 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$72,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$202,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$246,467
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$275,200

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Townhouse
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyCARROLL
Lot (acres)The size of the land the home sits on, from county records.0.19
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
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.Porch · 98 ft²

Transaction History(3)

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
Westminster West Middle SchoolB+
Middle · Grades 6–8 · 0.9 mi
E
Friendship Valley Elementary SchoolB-
Elementary · Grades PK–5 · 1.8 mi
H
Westminster High SchoolA-
High · Grades 9–12 · 2.1 mi

District: Carroll County Public Schools

Neighborhood · ZIP 21157These 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.105
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.80
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.46

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.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.41,419
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.542 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$105,034
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$121,439
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.44 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

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

135 Hollow Rock Ave 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 84% of homes in Carroll County
  • Costs more per square foot than 77% of homes in Westminster 21157
  • Smaller than 91% of homes in Carroll County
  • Has a smaller lot than 82% of homes in Westminster 21157
  • Older than 88% of homes in Carroll County

What homes are worth in Westminster 21157

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

This home
$219K$955K

This home is worth more than 19% of homes in Westminster 21157.

How it measures up in Westminster 21157

The dot is this home. The mark in the middle is the typical home in Westminster 21157.

Estimated value$333,332
CheaperTypical $456,667Pricier

Pricier than 19% of homes nearby

Price per ft²$309
CheaperTypical $266Pricier

Pricier than 77% of homes nearby

Living area1,080 ft²
SmallerTypical 1,740 ft²Bigger

Bigger than 11% of homes nearby

Lot size0.19 ac
SmallerTypical 0.61 acBigger

Bigger than 18% of homes nearby

Year built1948
OlderTypical 1979Newer

Newer than 16% of homes nearby

How 135 Hollow Rock Ave ranks against every home in each area.
MeasureThis homeWestminster 21157Carroll County
Estimated valuepricier than$333,33219% of homes16% of homes
Price per ft²pricier than$30977% of homes73% of homes
Living areabigger than1,080 ft²11% of homes9% of homes
Lot sizebigger than0.19 ac18% of homes18% of homes
Year builtnewer than194816% of homes12% of homes

About 135 Hollow Rock Ave

How much is 135 Hollow Rock Ave, Westminster, MD worth?

The TopHap Estimate for 135 Hollow Rock Ave, Westminster, MD is $333,332 as of Jul 14, 2026. The likely range is $324,365 to $342,299. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 135 Hollow Rock Ave, Westminster, MD last sell?

135 Hollow Rock Ave, Westminster, MD last sold on Dec 17, 2021 for $280,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 135 Hollow Rock Ave, Westminster, MD?

135 Hollow Rock Ave, Westminster, MD has 1 bathrooms, 1,080 square feet of living space and a 0.19-acre lot.

When was 135 Hollow Rock Ave, Westminster, MD built?

135 Hollow Rock Ave, Westminster, MD was built in 1948, making it 78 years old. It is a townhouse home. The building has 2 stories.

What schools serve 135 Hollow Rock Ave, Westminster, MD?

135 Hollow Rock Ave, Westminster, MD is assigned to Westminster West Middle School (middle), rated B+; Friendship Valley Elementary School (elementary), rated B-; Westminster 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 135 Hollow Rock Ave, Westminster, MD compare to other homes in Westminster 21157?

Among the 12,551 homes in Westminster 21157, it is worth more than 19% of them ($333,332 against a typical $456,667), its price per square foot is higher than 77% of them ($309 against a typical $266), it is bigger than 11% of them (1,080 ft² against a typical 1,740 ft²), its lot is bigger than 18% of them (0.19 ac against a typical 0.61 ac) and it is newer than 16% of them (1948 against a typical 1979). Measured against all of Carroll County, it is worth more than 16% 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 135 Hollow Rock Ave, Westminster, MD?

The 2025 property tax bill for 135 Hollow Rock Ave, Westminster, MD was $2,760. The county assessed it at $275,200.

More homes on Hollow Rock Ave

Closest homes

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Assigned schools

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