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TownhouseResidential
$330,466$278 / 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

721 HORPEL DR

MOUNT AIRY, MD 21771
2.5
Baths
1,188 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.
2,154 ft²
Lot SizeThe size of the land the home sits on, from county records.
1974
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$330K
$321K low$340K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,456 (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.$263,400 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$246,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$279,900

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.14 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.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.0.05
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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.Patio · 96 ft²

Transaction History(4)

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
Mount Airy Middle SchoolA-
Middle · Grades 6–8 · 0.2 mi
E
Parr's Ridge Elementary School
Elementary · Grades PK–2 · 0.3 mi
H
South Carroll High SchoolB+
High · Grades 9–12 · 6.9 mi

District: Carroll County Public Schools

Neighborhood · ZIP 21771These 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.59
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.37

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.1%
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.32,505
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.382 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$151,406
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$162,296
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%

Owner Tools

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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

721 Horpel 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 less than 97% of homes in Mount Airy 21771
  • Smaller than 91% of homes in Mount Airy 21771
  • Has a smaller lot than 97% of homes in Mount Airy 21771
  • Older than 78% of homes in Mount Airy 21771

What homes are worth in Mount Airy 21771

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

This home
$313K$1.1M

This home is worth more than 3% of homes in Mount Airy 21771.

How it measures up in Mount Airy 21771

The dot is this home. The mark in the middle is the typical home in Mount Airy 21771.

Estimated value$330,466
CheaperTypical $604,177Pricier

Pricier than 3% of homes nearby

Price per ft²$278
CheaperTypical $282Pricier

Pricier than 48% of homes nearby

Living area1,188 ft²
SmallerTypical 2,184 ft²Bigger

Bigger than 9% of homes nearby

Lot size2,154 ft²
SmallerTypical 0.95 acBigger

Bigger than 3% of homes nearby

Year built1974
OlderTypical 1988Newer

Newer than 22% of homes nearby

How 721 Horpel Dr ranks against every home in each area.
MeasureThis homeMount Airy 21771Carroll County
Estimated valuepricier than$330,4663% of homes17% of homes
Price per ft²pricier than$27848% of homes56% of homes
Living areabigger than1,188 ft²9% of homes16% of homes
Lot sizebigger than2,154 ft²3% of homes5% of homes
Year builtnewer than197422% of homes31% of homes

About 721 Horpel Dr

How much is 721 Horpel Dr, Mount Airy, MD worth?

The TopHap Estimate for 721 Horpel Dr, Mount Airy, MD is $330,466 as of Sep 24, 2026. The likely range is $321,080 to $339,852. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 721 Horpel Dr, Mount Airy, MD last sell?

721 Horpel Dr, Mount Airy, MD last sold on Mar 4, 2009, according to the county's recorded deed.

How big is 721 Horpel Dr, Mount Airy, MD?

721 Horpel Dr, Mount Airy, MD has 2.5 bathrooms, 1,188 square feet of living space and a 0.05-acre lot.

When was 721 Horpel Dr, Mount Airy, MD built?

721 Horpel Dr, Mount Airy, MD was built in 1974, making it 52 years old. It is a townhouse home. The building has 2 stories.

What schools serve 721 Horpel Dr, Mount Airy, MD?

721 Horpel Dr, Mount Airy, MD is assigned to Mount Airy Middle School (middle), rated A-; Parr's Ridge Elementary School (elementary); South Carroll 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 721 Horpel Dr, Mount Airy, MD compare to other homes in Mount Airy 21771?

Among the 10,756 homes in Mount Airy 21771, it is worth more than 3% of them ($330,466 against a typical $604,177), its price per square foot is higher than 48% of them ($278 against a typical $282), it is bigger than 9% of them (1,188 ft² against a typical 2,184 ft²), its lot is bigger than 3% of them (2,154 ft² against a typical 0.95 ac) and it is newer than 22% of them (1974 against a typical 1988). Measured against all of Carroll County, it is worth more than 17% 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 721 Horpel Dr, Mount Airy, MD?

The 2026 property tax bill for 721 Horpel Dr, Mount Airy, MD was $3,456. The county assessed it at $263,400.

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