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Single Family ResidenceResidential
$822,479$331 / 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 Jul 14, 2026
Last sold for $590,000 on Aug 3, 2007

16921 OLD COLONY WAY

ROCKVILLE, MD 20853
2.5
Baths
2,488 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.
0.38 ac
Lot SizeThe size of the land the home sits on, from county records.
1973
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

$822K
$775K low$870K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$590,000 · Aug 3, 2007

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,855 (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.$647,867 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$609,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$725,400

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.0.38
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.Yes
CoolingThe type of cooling or air conditioning in the home.Central
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.Garage, Attached
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 · 108 ft²

Transaction History(2)

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
Cashell Elementary SchoolA-
Elementary · Grades PK–5 · 0.1 mi
H
Col. Zadok Magruder High SchoolC
High · Grades 9–12 · 1.7 mi
M
Redland Middle SchoolC-
Middle · Grades 6–8 · 2.4 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%

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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

16921 Old Colony Way 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 76% of homes in Rockville 20853
  • Costs more per square foot than 67% of homes in Rockville 20853
  • Bigger than 71% of homes in Rockville 20853
  • Has a bigger lot than 85% of homes in Montgomery County
  • Newer than 86% 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
$240K$1.2M

This home is worth more than 76% 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$822,479
CheaperTypical $645,052Pricier

Pricier than 76% of homes nearby

Price per ft²$331
CheaperTypical $308Pricier

Pricier than 67% of homes nearby

Living area2,488 ft²
SmallerTypical 2,041 ft²Bigger

Bigger than 71% of homes nearby

Lot size0.38 ac
SmallerTypical 0.23 acBigger

Bigger than 79% of homes nearby

Year built1973
OlderTypical 1965Newer

Newer than 86% of homes nearby

How 16921 Old Colony Way ranks against every home in each area.
MeasureThis homeRockville 20853Montgomery County
Estimated valuepricier than$822,47976% of homes68% of homes
Price per ft²pricier than$33167% of homes61% of homes
Living areabigger than2,488 ft²71% of homes66% of homes
Lot sizebigger than0.38 ac79% of homes85% of homes
Year builtnewer than197386% of homes44% of homes

About 16921 Old Colony Way

How much is 16921 Old Colony Way, Rockville, MD worth?

The TopHap Estimate for 16921 Old Colony Way, Rockville, MD is $822,479 as of Jul 14, 2026. The likely range is $775,253 to $869,705. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 16921 Old Colony Way, Rockville, MD last sell?

16921 Old Colony Way, Rockville, MD last sold on Aug 3, 2007 for $590,000, according to the county's recorded deed.

How big is 16921 Old Colony Way, Rockville, MD?

16921 Old Colony Way, Rockville, MD has 2.5 bathrooms, 2,488 square feet of living space and a 0.38-acre lot.

When was 16921 Old Colony Way, Rockville, MD built?

16921 Old Colony Way, Rockville, MD was built in 1973, making it 53 years old. It is a bi-level home. The building has 2 stories.

What schools serve 16921 Old Colony Way, Rockville, MD?

16921 Old Colony Way, Rockville, MD is assigned to Cashell Elementary School (elementary), rated A-; Col. Zadok Magruder High School (high), rated C; Redland 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 16921 Old Colony Way, Rockville, MD compare to other homes in Rockville 20853?

Among the 9,294 homes in Rockville 20853, it is worth more than 76% of them ($822,479 against a typical $645,052), its price per square foot is higher than 67% of them ($331 against a typical $308), it is bigger than 71% of them (2,488 ft² against a typical 2,041 ft²), its lot is bigger than 79% of them (0.38 ac against a typical 0.23 ac) and it is newer than 86% of them (1973 against a typical 1965). Measured against all of Montgomery County, it is worth more than 68% 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 16921 Old Colony Way, Rockville, MD?

The 2025 property tax bill for 16921 Old Colony Way, Rockville, MD was $6,855. The county assessed it at $647,867.

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