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Single Family ResidenceResidential
$462,931$283 / 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 89How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $450,000 on Oct 31, 2025

4509 GRENOBLE CT

ROCKVILLE, MD 20853
1
Baths
1,633 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
1952
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$463K
$413K low$513K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$450,000 · Oct 31, 2025
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$237,931
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$190,345
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.49%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$225,000
LOWER LLC · recorded Oct 31, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,060 (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.$428,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$202,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$226,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$402,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$428,600

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.0.13
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.Central
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 · 30 ft²Patio · 352 ft²

Transaction History(3)

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
Wheaton Woods Elementary SchoolB+
Elementary · Grades PK–5 · 0.1 mi
M
Parkland Middle SchoolB-
Middle · Grades 6–8 · 1.0 mi
H
Wheaton High SchoolC+
High · Grades 9–12 · 1.3 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20853These 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.60
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.38

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
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.30,497
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,373 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$145,074
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$169,691
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

4509 Grenoble Ct 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 Rockville 20853
  • Costs less per square foot than 69% of homes in Rockville 20853
  • Smaller than 78% of homes in Rockville 20853
  • Has a smaller lot than 92% of homes in Rockville 20853
  • Older than 95% of homes in Rockville 20853

What homes are worth in Rockville 20853

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

This home
$239K$1.2M

This home is worth more than 8% of homes in Rockville 20853.

How it measures up in Rockville 20853

The dot is this home. The mark in the middle is the typical home in Rockville 20853.

Estimated value$462,931
CheaperTypical $641,524Pricier

Pricier than 8% of homes nearby

Price per ft²$283
CheaperTypical $309Pricier

Pricier than 31% of homes nearby

Living area1,633 ft²
SmallerTypical 2,032 ft²Bigger

Bigger than 22% of homes nearby

Lot size0.13 ac
SmallerTypical 0.23 acBigger

Bigger than 8% of homes nearby

Year built1952
OlderTypical 1965Newer

Newer than 5% of homes nearby

How 4509 Grenoble Ct ranks against every home in each area.
MeasureThis homeRockville 20853Montgomery County
Estimated valuepricier than$462,9318% of homes26% of homes
Price per ft²pricier than$28331% of homes40% of homes
Living areabigger than1,633 ft²22% of homes35% of homes
Lot sizebigger than0.13 ac8% of homes40% of homes
Year builtnewer than19525% of homes14% of homes

About 4509 Grenoble Ct

How much is 4509 Grenoble Ct, Rockville, MD worth?

The TopHap Estimate for 4509 Grenoble Ct, Rockville, MD is $462,931 as of Jul 14, 2026. The likely range is $412,678 to $513,184. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4509 Grenoble Ct, Rockville, MD last sell?

4509 Grenoble Ct, Rockville, MD last sold on Oct 31, 2025 for $450,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4509 Grenoble Ct, Rockville, MD?

4509 Grenoble Ct, Rockville, MD has 1 bathrooms, 1,633 square feet of living space and a 0.13-acre lot.

When was 4509 Grenoble Ct, Rockville, MD built?

4509 Grenoble Ct, Rockville, MD was built in 1952, making it 74 years old. It is a townhouse home. The building has 1 story.

What schools serve 4509 Grenoble Ct, Rockville, MD?

4509 Grenoble Ct, Rockville, MD is assigned to Wheaton Woods Elementary School (elementary), rated B+; Parkland Middle School (middle), rated B-; Wheaton High School (high), rated C+. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4509 Grenoble Ct, Rockville, MD compare to other homes in Rockville 20853?

Among the 9,292 homes in Rockville 20853, it is worth more than 8% of them ($462,931 against a typical $641,524), its price per square foot is higher than 31% of them ($283 against a typical $309), it is bigger than 22% of them (1,633 ft² against a typical 2,032 ft²), its lot is bigger than 8% of them (0.13 ac against a typical 0.23 ac) and it is newer than 5% of them (1952 against a typical 1965). Measured against all of Montgomery 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 4509 Grenoble Ct, Rockville, MD?

The 2025 property tax bill for 4509 Grenoble Ct, Rockville, MD was $5,060. The county assessed it at $428,600.

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