Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$503,162$462 / 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 Sep 24, 2026
Last sold for $96,500 on Nov 10, 1986

11509 PATAPSCO DR

ROCKVILLE, MD 20852
2
Baths
1,088 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$503K
$472K low$535K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$96,500 · Nov 10, 1986

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,111 (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.$454,900 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$260,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$194,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$433,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$454,900

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.Townhouse
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.15
ConstructionThe main material the home's frame and walls are built from.Brick
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.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 · 230 ft²

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

E
Viers Mill Elementary SchoolC-
Elementary · Grades PK–5 · 0.5 mi
H
Wheaton High SchoolC+
High · Grades 9–12 · 1.8 mi
M
A. Mario Loiederman Middle SchoolC
Middle · Grades 6–8 · 1.9 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20852These 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.128
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
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.96%
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.7.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.51,764
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,168 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$117,549
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$148,499
Average tempThe average temperature here across a full year.55°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%

Owner Tools

Do you own this home?
Claim this home

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

11509 Patapsco 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 68% of homes in Montgomery County
  • Costs more per square foot than 91% of homes in Rockville 20852
  • Smaller than 89% of homes in Montgomery County
  • Older than 93% of homes in Rockville 20852

What homes are worth in Rockville 20852

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

This home
$171K$1.7M

This home is worth more than 37% of homes in Rockville 20852.

How it measures up in Rockville 20852

The dot is this home. The mark in the middle is the typical home in Rockville 20852.

Estimated value$503,162
CheaperTypical $623,399Pricier

Pricier than 37% of homes nearby

Price per ft²$462
CheaperTypical $363Pricier

Pricier than 91% of homes nearby

Living area1,088 ft²
SmallerTypical 1,568 ft²Bigger

Bigger than 25% of homes nearby

Lot size0.15 ac
SmallerTypical 2,004 ft²Bigger

Bigger than 64% of homes nearby

Year built1956
OlderTypical 1980Newer

Newer than 7% of homes nearby

How 11509 Patapsco Dr ranks against every home in each area.
MeasureThis homeRockville 20852Montgomery County
Estimated valuepricier than$503,16237% of homes32% of homes
Price per ft²pricier than$46291% of homes90% of homes
Living areabigger than1,088 ft²25% of homes11% of homes
Lot sizebigger than0.15 ac64% of homes46% of homes
Year builtnewer than19567% of homes19% of homes

About 11509 Patapsco Dr

How much is 11509 Patapsco Dr, Rockville, MD worth?

The TopHap Estimate for 11509 Patapsco Dr, Rockville, MD is $503,162 as of Sep 24, 2026. The likely range is $471,537 to $534,787. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 11509 Patapsco Dr, Rockville, MD last sell?

11509 Patapsco Dr, Rockville, MD last sold on Nov 10, 1986 for $96,500, according to the county's recorded deed.

How big is 11509 Patapsco Dr, Rockville, MD?

11509 Patapsco Dr, Rockville, MD has 2 bathrooms, 1,088 square feet of living space and a 0.15-acre lot.

When was 11509 Patapsco Dr, Rockville, MD built?

11509 Patapsco Dr, Rockville, MD was built in 1956, making it 70 years old. It is a townhouse home. The building has 1 story.

What schools serve 11509 Patapsco Dr, Rockville, MD?

11509 Patapsco Dr, Rockville, MD is assigned to Viers Mill Elementary School (elementary), rated C-; Wheaton High School (high), rated C+; A. Mario Loiederman Middle School (middle), rated C. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 11509 Patapsco Dr, Rockville, MD compare to other homes in Rockville 20852?

Among the 13,874 homes in Rockville 20852, it is worth more than 37% of them ($503,162 against a typical $623,399), its price per square foot is higher than 91% of them ($462 against a typical $363), it is bigger than 25% of them (1,088 ft² against a typical 1,568 ft²), its lot is bigger than 64% of them (0.15 ac against a typical 2,004 ft²) and it is newer than 7% of them (1956 against a typical 1980). Measured against all of Montgomery County, it is worth more than 32% 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 11509 Patapsco Dr, Rockville, MD?

The 2025 property tax bill for 11509 Patapsco Dr, Rockville, MD was $5,111. The county assessed it at $454,900.

More homes on Patapsco Dr

Closest homes

More homes in Rockville 20852

Assigned schools

Explore the area

See this home in context

Open 11509 Patapsco Dr on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map