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Single Family ResidenceResidential
$1,087,386$352 / 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 95How 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

6636 ROCK LAWN DR

CLIFTON, VA 20124
4
Beds
4 / 1
Baths
3,092 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.
0.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1990
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
12
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.1M
$1M low$1.1M high
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.$734,886
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$587,909
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.34%
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.$352,500
FAIRWAY INDEPENDENT MTG · 3.375% · recorded Jun 9, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,884 (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.$941,510 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$300,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$641,510
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$879,610
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$941,510

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.Split Level
CountyFairfax
Lot (acres)The size of the land the home sits on, from county records.0.24
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.Wood Shingle
HeatingThe type of heating system in the home.Heat Pump
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.BalconyDeck · 120 ft²Patio · 120 ft²Porch · 285 ft²

Transaction History(1)

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.

M
Liberty Middle SchoolB+
Middle · Grades 7–8 · 0.4 mi
E
Union Mill Elementary SchoolA
Elementary · Grades KG–6 · 0.8 mi
H
Centreville High SchoolC+
High · Grades 9–12 · 1.2 mi

District: Fairfax County Public Schools

Neighborhood · ZIP 20124These 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.34
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.77
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.39

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.41%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.7%
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.15,747
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.715 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$200,986
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$243,143
Average tempThe average temperature here across a full year.56°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.63%

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

6636 Rock Lawn 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 78% of homes in Fairfax County
  • Costs less per square foot than 83% of homes in Fairfax County
  • Bigger than 86% of homes in Fairfax County
  • Newer than 72% of homes in Fairfax County

What homes are worth in Clifton 20124

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

This home
$374K$2.4M

This home is worth more than 58% of homes in Clifton 20124.

How it measures up in Clifton 20124

The dot is this home. The mark in the middle is the typical home in Clifton 20124.

Estimated value$1,087,386
CheaperTypical $1,042,571Pricier

Pricier than 58% of homes nearby

Price per ft²$352
CheaperTypical $382Pricier

Pricier than 27% of homes nearby

Living area3,092 ft²
SmallerTypical 2,728 ft²Bigger

Bigger than 63% of homes nearby

Lot size0.24 ac
SmallerTypical 0.28 acBigger

Bigger than 40% of homes nearby

Year built1990
OlderTypical 1989Newer

Newer than 61% of homes nearby

How 6636 Rock Lawn Dr ranks against every home in each area.
MeasureThis homeClifton 20124Fairfax County
Estimated valuepricier than$1,087,38658% of homes78% of homes
Price per ft²pricier than$35227% of homes17% of homes
Living areabigger than3,092 ft²63% of homes86% of homes
Lot sizebigger than0.24 ac40% of homes51% of homes
Year builtnewer than199061% of homes72% of homes

About 6636 Rock Lawn Dr

How much is 6636 Rock Lawn Dr, Clifton, VA worth?

The TopHap Estimate for 6636 Rock Lawn Dr, Clifton, VA is $1,087,386 as of Jul 14, 2026. The likely range is $1,037,396 to $1,137,376. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 6636 Rock Lawn Dr, Clifton, VA?

6636 Rock Lawn Dr, Clifton, VA has 4 bedrooms, 4 bathrooms, 3,092 square feet of living space and a 0.24-acre lot.

When was 6636 Rock Lawn Dr, Clifton, VA built?

6636 Rock Lawn Dr, Clifton, VA was built in 1990, making it 36 years old. It is a split level home. The building has 2 stories.

What schools serve 6636 Rock Lawn Dr, Clifton, VA?

6636 Rock Lawn Dr, Clifton, VA is assigned to Liberty Middle School (middle), rated B+; Union Mill Elementary School (elementary), rated A; Centreville High School (high), rated C+. All sit in Fairfax County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 6636 Rock Lawn Dr, Clifton, VA compare to other homes in Clifton 20124?

Among the 5,002 homes in Clifton 20124, it is worth more than 58% of them ($1,087,386 against a typical $1,042,571), its price per square foot is higher than 27% of them ($352 against a typical $382), it is bigger than 63% of them (3,092 ft² against a typical 2,728 ft²), its lot is bigger than 40% of them (0.24 ac against a typical 0.28 ac) and it is newer than 61% of them (1990 against a typical 1989). Measured against all of Fairfax County, it is worth more than 78% 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 6636 Rock Lawn Dr, Clifton, VA?

The 2025 property tax bill for 6636 Rock Lawn Dr, Clifton, VA was $10,884. The county assessed it at $941,510.

Closest homes

More homes in Clifton 20124

Assigned schools

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