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Single Family ResidenceResidential
$518,036$202 / 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 Sep 24, 2026

189 OPAL AVE

WESTMINSTER, MD 21157
2
Baths
2,565 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.
1.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1979
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$518K
$500K low$536K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,566 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$424,967 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$403,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$467,100

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.Split Level
CountyCARROLL
Lot (acres)The size of the land the home sits on, from county records.1.24
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Electric
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 · 120 ft²Porch · 100 ft²

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

M
Shiloh Middle SchoolA-
Middle · Grades 6–8 · 2.6 mi
E
Hampstead Elementary SchoolA-
Elementary · Grades PK–5 · 2.7 mi
H
Manchester Valley High SchoolB
High · Grades 9–12 · 5.4 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%

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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

189 Opal 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.

  • Costs less per square foot than 91% of homes in Carroll County
  • Bigger than 80% of homes in Westminster 21157
  • Has a bigger lot than 73% of homes in Westminster 21157

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$940K

This home is worth more than 64% 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$518,036
CheaperTypical $446,691Pricier

Pricier than 64% of homes nearby

Price per ft²$202
CheaperTypical $259Pricier

Pricier than 11% of homes nearby

Living area2,565 ft²
SmallerTypical 1,732 ft²Bigger

Bigger than 80% of homes nearby

Lot size1.24 ac
SmallerTypical 0.61 acBigger

Bigger than 73% of homes nearby

Year built1979
OlderTypical 1979Newer

Newer than 50% of homes nearby

How 189 Opal Ave ranks against every home in each area.
MeasureThis homeWestminster 21157Carroll County
Estimated valuepricier than$518,03664% of homes59% of homes
Price per ft²pricier than$20211% of homes9% of homes
Living areabigger than2,565 ft²80% of homes80% of homes
Lot sizebigger than1.24 ac73% of homes69% of homes
Year builtnewer than197950% of homes41% of homes

About 189 Opal Ave

How much is 189 Opal Ave, Westminster, MD worth?

The TopHap Estimate for 189 Opal Ave, Westminster, MD is $518,036 as of Sep 24, 2026. The likely range is $499,796 to $536,276. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 189 Opal Ave, Westminster, MD last sell?

189 Opal Ave, Westminster, MD last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 189 Opal Ave, Westminster, MD?

189 Opal Ave, Westminster, MD has 2 bathrooms, 2,565 square feet of living space and a 1.24-acre lot.

When was 189 Opal Ave, Westminster, MD built?

189 Opal Ave, Westminster, MD was built in 1979, making it 47 years old. It is a split level home. The building has 2 stories.

What schools serve 189 Opal Ave, Westminster, MD?

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

How does 189 Opal Ave, Westminster, MD compare to other homes in Westminster 21157?

Among the 12,569 homes in Westminster 21157, it is worth more than 64% of them ($518,036 against a typical $446,691), its price per square foot is higher than 11% of them ($202 against a typical $259), it is bigger than 80% of them (2,565 ft² against a typical 1,732 ft²), its lot is bigger than 73% of them (1.24 ac against a typical 0.61 ac) and it is newer than 50% of them (1979 against a typical 1979). Measured against all of Carroll County, it is worth more than 59% 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 189 Opal Ave, Westminster, MD?

The 2026 property tax bill for 189 Opal Ave, Westminster, MD was $4,566. The county assessed it at $424,967.

More homes on Opal Ave

Closest homes

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Assigned schools

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