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Single Family ResidenceResidential
$650,000$229 / 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 Sep 24, 2026
Last sold for $420,000 on Jun 29, 2018

315 MARY AVE

WESTMINSTER, MD 21157
4
Baths
2,841 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1961
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$650K
$629K low$671K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$420,000 · Jun 29, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,127 (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.$497,600 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$91,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$405,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$469,767
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$497,600

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.41
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
8
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
76
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
85
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
37
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.minimal

Scores 0–100; higher = greater projected risk.

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.0.28
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Baseboard
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 92 ft²

Transaction History(2)

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.

H
Winters Mill High SchoolA-
High · Grades 9–12 · 1.1 mi
M
Westminster East Middle SchoolC+
Middle · Grades 6–8 · 1.4 mi
E
Robert Moton Elementary SchoolC-
Elementary · Grades PK–5 · 1.5 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

315 Mary 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 more than 83% of homes in Westminster 21157
  • Costs less per square foot than 78% of homes in Carroll County
  • Bigger than 86% of homes in Westminster 21157
  • Has a smaller lot than 73% of homes in Westminster 21157
  • Older than 82% 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
$215K$924K

This home is worth more than 83% 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$650,000
CheaperTypical $447,101Pricier

Pricier than 83% of homes nearby

Price per ft²$229
CheaperTypical $259Pricier

Pricier than 26% of homes nearby

Living area2,841 ft²
SmallerTypical 1,732 ft²Bigger

Bigger than 86% of homes nearby

Lot size0.28 ac
SmallerTypical 0.6 acBigger

Bigger than 27% of homes nearby

Year built1961
OlderTypical 1980Newer

Newer than 24% of homes nearby

How 315 Mary Ave ranks against every home in each area.
MeasureThis homeWestminster 21157Carroll County
Estimated valuepricier than$650,00083% of homes79% of homes
Price per ft²pricier than$22926% of homes22% of homes
Living areabigger than2,841 ft²86% of homes86% of homes
Lot sizebigger than0.28 ac27% of homes28% of homes
Year builtnewer than196124% of homes18% of homes

About 315 Mary Ave

How much is 315 Mary Ave, Westminster, MD worth?

The TopHap Estimate for 315 Mary Ave, Westminster, MD is $650,000 as of Sep 24, 2026. The likely range is $628,940 to $671,060. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 315 Mary Ave, Westminster, MD last sell?

315 Mary Ave, Westminster, MD last sold on Jun 29, 2018 for $420,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 315 Mary Ave, Westminster, MD?

315 Mary Ave, Westminster, MD has 4 bathrooms, 2,841 square feet of living space and a 0.28-acre lot.

When was 315 Mary Ave, Westminster, MD built?

315 Mary Ave, Westminster, MD was built in 1961, making it 65 years old. The building has 1 story.

What schools serve 315 Mary Ave, Westminster, MD?

315 Mary Ave, Westminster, MD is assigned to Winters Mill High School (high), rated A-; Westminster East Middle School (middle), rated C+; Robert Moton Elementary School (elementary), rated C-. All sit in Carroll County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 315 Mary Ave, Westminster, MD compare to other homes in Westminster 21157?

Among the 12,564 homes in Westminster 21157, it is worth more than 83% of them ($650,000 against a typical $447,101), its price per square foot is higher than 26% of them ($229 against a typical $259), it is bigger than 86% of them (2,841 ft² against a typical 1,732 ft²), its lot is bigger than 27% of them (0.28 ac against a typical 0.6 ac) and it is newer than 24% of them (1961 against a typical 1980). Measured against all of Carroll County, it is worth more than 79% 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 315 Mary Ave, Westminster, MD?

The 2025 property tax bill for 315 Mary Ave, Westminster, MD was $5,127. The county assessed it at $497,600.

More homes on Mary Ave

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Assigned schools

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