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Single Family ResidenceResidential
$377,166$222 / 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 94How 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 $255,000 on May 20, 2019

409 PROSPECT RD

MOUNT AIRY, MD 21771
1.5
Baths
1,696 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.
0.31 ac
Lot SizeThe size of the land the home sits on, from county records.
1900
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$377K
$356K low$398K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$255,000 · May 20, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,118 (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.$302,067 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$284,133
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$320,000

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.43
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
14
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
75
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
90
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.

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
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyFREDERICK
Lot (acres)The size of the land the home sits on, from county records.0.31
RoofThe main material covering the roof, such as asphalt shingle or tile.Metal
HeatingThe type of heating system in the home.Electric
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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 · 300 ft²Porch · 341 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
Twin Ridge Elementary SchoolA+
Elementary · Grades KG–5 · 1.1 mi
H
Linganore High SchoolB
High · Grades 9–12 · 6.0 mi
M
Windsor Knolls Middle SchoolA-
Middle · Grades 6–8 · 7.4 mi

District: Frederick 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%

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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

409 Prospect Rd 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 92% of homes in Mount Airy 21771
  • Costs less per square foot than 86% of homes in Mount Airy 21771
  • Smaller than 72% of homes in Frederick County
  • Has a smaller lot than 82% of homes in Mount Airy 21771
  • Older than 96% 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
$322K$1.1M

This home is worth more than 8% 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$377,166
CheaperTypical $600,917Pricier

Pricier than 8% of homes nearby

Price per ft²$222
CheaperTypical $279Pricier

Pricier than 14% of homes nearby

Living area1,696 ft²
SmallerTypical 2,180 ft²Bigger

Bigger than 30% of homes nearby

Lot size0.31 ac
SmallerTypical 0.95 acBigger

Bigger than 18% of homes nearby

Year built1900
OlderTypical 1988Newer

Newer than 4% of homes nearby

How 409 Prospect Rd ranks against every home in each area.
MeasureThis homeMount Airy 21771Frederick County
Estimated valuepricier than$377,1668% of homes26% of homes
Price per ft²pricier than$22214% of homes46% of homes
Living areabigger than1,696 ft²30% of homes28% of homes
Lot sizebigger than0.31 ac18% of homes60% of homes
Year builtnewer than19004% of homes9% of homes

About 409 Prospect Rd

How much is 409 Prospect Rd, Mount Airy, MD worth?

The TopHap Estimate for 409 Prospect Rd, Mount Airy, MD is $377,166 as of Aug 30, 2026. The likely range is $355,846 to $398,486. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 409 Prospect Rd, Mount Airy, MD last sell?

409 Prospect Rd, Mount Airy, MD last sold on May 20, 2019 for $255,000, according to the county's recorded deed.

How big is 409 Prospect Rd, Mount Airy, MD?

409 Prospect Rd, Mount Airy, MD has 1.5 bathrooms, 1,696 square feet of living space and a 0.31-acre lot.

When was 409 Prospect Rd, Mount Airy, MD built?

409 Prospect Rd, Mount Airy, MD was built in 1900, making it 126 years old. It is a conventional home. The building has 2 stories.

What schools serve 409 Prospect Rd, Mount Airy, MD?

409 Prospect Rd, Mount Airy, MD is assigned to Twin Ridge Elementary School (elementary), rated A+; Linganore High School (high), rated B; Windsor Knolls Middle School (middle), rated A-. All sit in Frederick County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 409 Prospect Rd, Mount Airy, MD compare to other homes in Mount Airy 21771?

Among the 10,759 homes in Mount Airy 21771, it is worth more than 8% of them ($377,166 against a typical $600,917), its price per square foot is higher than 14% of them ($222 against a typical $279), it is bigger than 30% of them (1,696 ft² against a typical 2,180 ft²), its lot is bigger than 18% of them (0.31 ac against a typical 0.95 ac) and it is newer than 4% of them (1900 against a typical 1988). Measured against all of Frederick County, it is worth more than 26% 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 409 Prospect Rd, Mount Airy, MD?

The 2025 property tax bill for 409 Prospect Rd, Mount Airy, MD was $4,118. The county assessed it at $302,067.

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