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Single Family ResidenceResidential
$580,014$271 / 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 92How 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

9109 ROSEMONT DR

GAITHERSBURG, MD 20877
2.5
Baths
2,144 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.
0.47 ac
Lot SizeThe size of the land the home sits on, from county records.
1964
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

$580K
$536K low$624K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,109 (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.$519,400 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$173,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$346,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$471,467
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$519,400

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.Bi-Level
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.47
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.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.Carport (Unspecified)
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 · 364 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Rosemont Elementary SchoolC+
Elementary · Grades PK–5 · 0.3 mi
H
Gaithersburg High SchoolD+
High · Grades 9–12 · 0.7 mi
M
Forest Oak Middle SchoolD+
Middle · Grades 6–8 · 1.8 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20877These 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.124
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.36

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
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.38,931
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,116 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$84,983
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$109,325
Average tempThe average temperature here across a full year.54°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

9109 Rosemont 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 71% of homes in Gaithersburg 20877
  • Costs less per square foot than 66% of homes in Montgomery County
  • Bigger than 69% of homes in Gaithersburg 20877
  • Has a bigger lot than 98% of homes in Gaithersburg
  • Older than 96% of homes in Gaithersburg

What homes are worth in Gaithersburg 20877

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

This home
$161K$798K

This home is worth more than 71% of homes in Gaithersburg 20877.

How it measures up in Gaithersburg 20877

The dot is this home. The mark in the middle is the typical home in Gaithersburg 20877.

Estimated value$580,014
CheaperTypical $469,845Pricier

Pricier than 71% of homes nearby

Price per ft²$271
CheaperTypical $259Pricier

Pricier than 60% of homes nearby

Living area2,144 ft²
SmallerTypical 1,696 ft²Bigger

Bigger than 69% of homes nearby

Lot size0.47 ac
SmallerTypical 3,920 ft²Bigger

Bigger than 94% of homes nearby

Year built1964
OlderTypical 1980Newer

Newer than 13% of homes nearby

How 9109 Rosemont Dr ranks against every home in each area.
MeasureThis homeGaithersburgGaithersburg 20877Montgomery County
Estimated valuepricier than$580,01458% of homes71% of homes43% of homes
Price per ft²pricier than$27137% of homes60% of homes34% of homes
Living areabigger than2,144 ft²64% of homes69% of homes55% of homes
Lot sizebigger than0.47 ac98% of homes94% of homes88% of homes
Year builtnewer than19644% of homes13% of homes29% of homes

About 9109 Rosemont Dr

How much is 9109 Rosemont Dr, Gaithersburg, MD worth?

The TopHap Estimate for 9109 Rosemont Dr, Gaithersburg, MD is $580,014 as of Sep 24, 2026. The likely range is $535,569 to $624,459. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9109 Rosemont Dr, Gaithersburg, MD last sell?

9109 Rosemont Dr, Gaithersburg, MD last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 9109 Rosemont Dr, Gaithersburg, MD?

9109 Rosemont Dr, Gaithersburg, MD has 2.5 bathrooms, 2,144 square feet of living space and a 0.47-acre lot.

When was 9109 Rosemont Dr, Gaithersburg, MD built?

9109 Rosemont Dr, Gaithersburg, MD was built in 1964, making it 62 years old. It is a bi-level home. The building has 2 stories.

What schools serve 9109 Rosemont Dr, Gaithersburg, MD?

9109 Rosemont Dr, Gaithersburg, MD is assigned to Rosemont Elementary School (elementary), rated C+; Gaithersburg High School (high), rated D+; Forest Oak Middle School (middle), rated D+. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9109 Rosemont Dr, Gaithersburg, MD compare to other homes in Gaithersburg 20877?

Among the 6,654 homes in Gaithersburg 20877, it is worth more than 71% of them ($580,014 against a typical $469,845), its price per square foot is higher than 60% of them ($271 against a typical $259), it is bigger than 69% of them (2,144 ft² against a typical 1,696 ft²), its lot is bigger than 94% of them (0.47 ac against a typical 3,920 ft²) and it is newer than 13% of them (1964 against a typical 1980). Measured against all of Montgomery County, it is worth more than 43% 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 9109 Rosemont Dr, Gaithersburg, MD?

The 2025 property tax bill for 9109 Rosemont Dr, Gaithersburg, MD was $6,109. The county assessed it at $519,400.

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