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Single Family ResidenceResidential
$467,520$270 / 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 86How 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 $164,900 on Apr 14, 1999

4391 MILL RACE DR

UNION BRIDGE, MD 21791
3
Baths
1,732 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.
3 ac
Lot SizeThe size of the land the home sits on, from county records.
1986
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

$468K
$401K low$534K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$164,900 · Apr 14, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,474 (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.$434,300 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$394,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$474,400

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 Foyer
CountyCARROLL
Lot (acres)The size of the land the home sits on, from county records.3.00
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Heat Pump
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 · 422 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.

E
Elmer A. Wolfe Elementary SchoolC+
Elementary · Grades PK–5 · 2.7 mi
H
Francis Scott Key High SchoolB+
High · Grades 9–12 · 3.6 mi
M
Northwest Middle SchoolA-
Middle · Grades 6–8 · 7.5 mi

District: Carroll County Public Schools

Neighborhood · ZIP 21791These 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.134
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.75
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.44

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.17%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.6%
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.6,190
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.130 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$100,097
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$114,799
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.43 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

4391 Mill Race Dr 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 72% of homes in Union Bridge 21791
  • Costs more per square foot than 74% of homes in Union Bridge 21791
  • Has a bigger lot than 85% of homes in Carroll County
  • Newer than 72% of homes in Union Bridge 21791

What homes are worth in Union Bridge 21791

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

This home
$160K$829K

This home is worth more than 72% of homes in Union Bridge 21791.

How it measures up in Union Bridge 21791

The dot is this home. The mark in the middle is the typical home in Union Bridge 21791.

Estimated value$467,520
CheaperTypical $367,501Pricier

Pricier than 72% of homes nearby

Price per ft²$270
CheaperTypical $227Pricier

Pricier than 74% of homes nearby

Living area1,732 ft²
SmallerTypical 1,700 ft²Bigger

Bigger than 52% of homes nearby

Lot size3 ac
SmallerTypical 1.01 acBigger

Bigger than 80% of homes nearby

Year built1986
OlderTypical 1972Newer

Newer than 72% of homes nearby

How 4391 Mill Race Dr ranks against every home in each area.
MeasureThis homeUnion Bridge 21791Carroll County
Estimated valuepricier than$467,52072% of homes48% of homes
Price per ft²pricier than$27074% of homes50% of homes
Living areabigger than1,732 ft²52% of homes47% of homes
Lot sizebigger than3 ac80% of homes85% of homes
Year builtnewer than198672% of homes53% of homes

About 4391 Mill Race Dr

How much is 4391 Mill Race Dr, Union Bridge, MD worth?

The TopHap Estimate for 4391 Mill Race Dr, Union Bridge, MD is $467,520 as of Aug 30, 2026. The likely range is $401,300 to $533,740. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4391 Mill Race Dr, Union Bridge, MD last sell?

4391 Mill Race Dr, Union Bridge, MD last sold on Apr 14, 1999 for $164,900, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4391 Mill Race Dr, Union Bridge, MD?

4391 Mill Race Dr, Union Bridge, MD has 3 bathrooms, 1,732 square feet of living space and a 3.00-acre lot.

When was 4391 Mill Race Dr, Union Bridge, MD built?

4391 Mill Race Dr, Union Bridge, MD was built in 1986, making it 40 years old. It is a split foyer home. The building has 2 stories.

What schools serve 4391 Mill Race Dr, Union Bridge, MD?

4391 Mill Race Dr, Union Bridge, MD is assigned to Elmer A. Wolfe Elementary School (elementary), rated C+; Francis Scott Key High School (high), rated B+; Northwest Middle School (middle), rated A-. All sit in Carroll County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4391 Mill Race Dr, Union Bridge, MD compare to other homes in Union Bridge 21791?

Among the 1,920 homes in Union Bridge 21791, it is worth more than 72% of them ($467,520 against a typical $367,501), its price per square foot is higher than 74% of them ($270 against a typical $227), it is bigger than 52% of them (1,732 ft² against a typical 1,700 ft²), its lot is bigger than 80% of them (3 ac against a typical 1.01 ac) and it is newer than 72% of them (1986 against a typical 1972). Measured against all of Carroll County, it is worth more than 48% 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 4391 Mill Race Dr, Union Bridge, MD?

The 2025 property tax bill for 4391 Mill Race Dr, Union Bridge, MD was $4,474. The county assessed it at $434,300.

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