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Single Family ResidenceResidential
$531,339$238 / 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 90How 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 $205,000 on Oct 12, 1999

405 BONN CT

WESTMINSTER, MD 21157
2.5
Baths
2,228 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.
1996
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

$531K
$478K low$584K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$205,000 · Oct 12, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,638 (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.$453,900 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$121,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$332,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$427,367
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$453,900

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.12 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.0.2 percent flood zone

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.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.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.Deck · 530 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.

E
William Winchester Elementary SchoolB+
Elementary · Grades PK–5 · 1.0 mi
M
Westminster East Middle SchoolC+
Middle · Grades 6–8 · 1.3 mi
H
Winters Mill High SchoolA-
High · Grades 9–12 · 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

405 Bonn Ct 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 67% of homes in Westminster 21157
  • Costs less per square foot than 73% of homes in Carroll County
  • Bigger than 70% of homes in Westminster 21157
  • Has a smaller lot than 72% of homes in Westminster 21157
  • Newer than 80% 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
$208K$922K

This home is worth more than 67% 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$531,339
CheaperTypical $445,715Pricier

Pricier than 67% of homes nearby

Price per ft²$238
CheaperTypical $260Pricier

Pricier than 33% of homes nearby

Living area2,228 ft²
SmallerTypical 1,736 ft²Bigger

Bigger than 70% of homes nearby

Lot size0.28 ac
SmallerTypical 0.61 acBigger

Bigger than 28% of homes nearby

Year built1996
OlderTypical 1979Newer

Newer than 80% of homes nearby

How 405 Bonn Ct ranks against every home in each area.
MeasureThis homeWestminster 21157Carroll County
Estimated valuepricier than$531,33967% of homes62% of homes
Price per ft²pricier than$23833% of homes27% of homes
Living areabigger than2,228 ft²70% of homes69% of homes
Lot sizebigger than0.28 ac28% of homes29% of homes
Year builtnewer than199680% of homes73% of homes

About 405 Bonn Ct

How much is 405 Bonn Ct, Westminster, MD worth?

The TopHap Estimate for 405 Bonn Ct, Westminster, MD is $531,339 as of Aug 30, 2026. The likely range is $478,305 to $584,373. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 405 Bonn Ct, Westminster, MD last sell?

405 Bonn Ct, Westminster, MD last sold on Oct 12, 1999 for $205,000, according to the county's recorded deed.

How big is 405 Bonn Ct, Westminster, MD?

405 Bonn Ct, Westminster, MD has 2.5 bathrooms, 2,228 square feet of living space and a 0.28-acre lot.

When was 405 Bonn Ct, Westminster, MD built?

405 Bonn Ct, Westminster, MD was built in 1996, making it 30 years old. The building has 2 stories.

What schools serve 405 Bonn Ct, Westminster, MD?

405 Bonn Ct, Westminster, MD is assigned to William Winchester Elementary School (elementary), rated B+; Westminster East Middle School (middle), rated C+; Winters Mill 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 405 Bonn Ct, Westminster, MD compare to other homes in Westminster 21157?

Among the 12,568 homes in Westminster 21157, it is worth more than 67% of them ($531,339 against a typical $445,715), its price per square foot is higher than 33% of them ($238 against a typical $260), it is bigger than 70% of them (2,228 ft² against a typical 1,736 ft²), its lot is bigger than 28% of them (0.28 ac against a typical 0.61 ac) and it is newer than 80% of them (1996 against a typical 1979). Measured against all of Carroll County, it is worth more than 62% 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 405 Bonn Ct, Westminster, MD?

The 2025 property tax bill for 405 Bonn Ct, Westminster, MD was $4,638. The county assessed it at $453,900.

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