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Single Family ResidenceResidential
$1,664,974$371 / 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 93How 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 $1,200,000 on May 24, 2021

10620 ROCK RUN DR

POTOMAC, MD 20854
3.5
Baths
4,484 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.
1.03 ac
Lot SizeThe size of the land the home sits on, from county records.
1959
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.7M
$1.6M low$1.8M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,200,000 · May 24, 2021
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.$854,974
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$683,979
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.48%
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.$810,000
PMAC LENDING SERVICES INC · 3.5% 1 · recorded May 24, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,824 (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.$1,189,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$561,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$627,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,139,833
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,189,000

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
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.Radiant
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.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.Deck · 290 ft²Patio · 239 ft²

Transaction History(4)

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
Carderock Springs Elementary SchoolA+
Elementary · Grades KG–5 · 2.7 mi
M
Thomas W. Pyle Middle SchoolA+
Middle · Grades 6–8 · 4.8 mi
H
Walt Whitman High SchoolA
High · Grades 9–12 · 5.0 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20854These 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.43
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.35

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.2.5%
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.51,685
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,423 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$211,237
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$271,649
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.42 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.Yes

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

10620 Rock Run 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 94% of homes in Montgomery County
  • Costs more per square foot than 74% of homes in Montgomery County
  • Bigger than 92% of homes in Montgomery County
  • Has a bigger lot than 94% of homes in Montgomery County
  • Older than 98% of homes in Potomac 20854

What homes are worth in Potomac 20854

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

This home
$615K$3.4M

This home is worth more than 73% of homes in Potomac 20854.

How it measures up in Potomac 20854

The dot is this home. The mark in the middle is the typical home in Potomac 20854.

Estimated value$1,664,974
CheaperTypical $1,271,328Pricier

Pricier than 73% of homes nearby

Price per ft²$371
CheaperTypical $371Pricier

Pricier than 50% of homes nearby

Living area4,484 ft²
SmallerTypical 3,336 ft²Bigger

Bigger than 69% of homes nearby

Lot size1.03 ac
SmallerTypical 0.3 acBigger

Bigger than 81% of homes nearby

Year built1959
OlderTypical 1977Newer

Newer than 2% of homes nearby

How 10620 Rock Run Dr ranks against every home in each area.
MeasureThis homePotomac 20854Montgomery County
Estimated valuepricier than$1,664,97473% of homes94% of homes
Price per ft²pricier than$37150% of homes74% of homes
Living areabigger than4,484 ft²69% of homes92% of homes
Lot sizebigger than1.03 ac81% of homes94% of homes
Year builtnewer than19592% of homes22% of homes

About 10620 Rock Run Dr

How much is 10620 Rock Run Dr, Potomac, MD worth?

The TopHap Estimate for 10620 Rock Run Dr, Potomac, MD is $1,664,974 as of Jul 14, 2026. The likely range is $1,550,073 to $1,779,875. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10620 Rock Run Dr, Potomac, MD last sell?

10620 Rock Run Dr, Potomac, MD last sold on May 24, 2021 for $1,200,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 10620 Rock Run Dr, Potomac, MD?

10620 Rock Run Dr, Potomac, MD has 3.5 bathrooms and 4,484 square feet of living space.

When was 10620 Rock Run Dr, Potomac, MD built?

10620 Rock Run Dr, Potomac, MD was built in 1959, making it 67 years old. It is a townhouse home. The building has 1 story.

What schools serve 10620 Rock Run Dr, Potomac, MD?

10620 Rock Run Dr, Potomac, MD is assigned to Carderock Springs Elementary School (elementary), rated A+; Thomas W. Pyle Middle School (middle), rated A+; Walt Whitman High School (high), rated A. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10620 Rock Run Dr, Potomac, MD compare to other homes in Potomac 20854?

Among the 17,109 homes in Potomac 20854, it is worth more than 73% of them ($1,664,974 against a typical $1,271,328), its price per square foot is higher than 50% of them ($371 against a typical $371), it is bigger than 69% of them (4,484 ft² against a typical 3,336 ft²), its lot is bigger than 81% of them (1.03 ac against a typical 0.3 ac) and it is newer than 2% of them (1959 against a typical 1977). Measured against all of Montgomery County, it is worth more than 94% 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 10620 Rock Run Dr, Potomac, MD?

The 2025 property tax bill for 10620 Rock Run Dr, Potomac, MD was $13,824. The county assessed it at $1,189,000.

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