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Single Family ResidenceResidential
$1,303,614$476 / 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 Oct 21, 2026
Last sold for $675,000 on Sep 19, 2016

6610 CASTLE KNOLL DR

CLIFTON, VA 20124
4
Beds
4 / 2
Baths
2,736 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.
5 ac
Lot SizeThe size of the land the home sits on, from county records.
1976
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
11
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

$1.3M
$1.2M low$1.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$675,000 · Sep 19, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,482 (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.$1,079,760 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$557,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$522,760
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$996,240
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,079,760

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.47 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyFAIRFAX
Lot (acres)The size of the land the home sits on, from county records.5.00
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
ViewThe type of view from the property, or another feature of the site that affects value.Buildable
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Tennis courtDeck · 399 ft²Patio · 399 ft²Porch · 480 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
Oak View Elementary SchoolA
Elementary · Grades KG–6 · 4.3 mi
M
Robinson Secondary SchoolA
Middle · Grades 7–12 · 4.6 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%

Owner Tools

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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

6610 Castle Knoll 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 87% of homes in Fairfax County
  • Costs more per square foot than 90% of homes in Clifton 20124
  • Bigger than 82% of homes in Fairfax County
  • Among the largest lots in Fairfax County
  • Older than 90% of homes in Clifton 20124

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
$362K$2.1M

This home is worth more than 79% 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$1,303,614
CheaperTypical $1,020,915Pricier

Pricier than 79% of homes nearby

Price per ft²$476
CheaperTypical $378Pricier

Pricier than 90% of homes nearby

Living area2,736 ft²
SmallerTypical 2,725 ft²Bigger

Bigger than 51% of homes nearby

Lot size5 ac
SmallerTypical 0.28 acBigger

Bigger than 86% of homes nearby

Year built1976
OlderTypical 1989Newer

Newer than 10% of homes nearby

How 6610 Castle Knoll Dr ranks against every home in each area.
MeasureThis homeCliftonClifton 20124Fairfax County
Estimated valuepricier than$1,303,61443% of homes79% of homes87% of homes
Price per ft²pricier than$47678% of homes90% of homes68% of homes
Living areabigger than2,736 ft²28% of homes51% of homes82% of homes
Lot sizebigger than5 ac63% of homes86% of homesalmost all homes
Year builtnewer than197627% of homes10% of homes39% of homes

About 6610 Castle Knoll Dr

How much is 6610 Castle Knoll Dr, Clifton, VA worth?

The TopHap Estimate for 6610 Castle Knoll Dr, Clifton, VA is $1,303,614 as of Oct 21, 2026. The likely range is $1,229,818 to $1,377,410. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 6610 Castle Knoll Dr, Clifton, VA last sell?

6610 Castle Knoll Dr, Clifton, VA last sold on Sep 19, 2016 for $675,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 6610 Castle Knoll Dr, Clifton, VA?

6610 Castle Knoll Dr, Clifton, VA has 4 bedrooms, 4 bathrooms, 2,736 square feet of living space and a 5.00-acre lot.

When was 6610 Castle Knoll Dr, Clifton, VA built?

6610 Castle Knoll Dr, Clifton, VA was built in 1976, making it 50 years old. The building has 1 story.

What schools serve 6610 Castle Knoll Dr, Clifton, VA?

6610 Castle Knoll Dr, Clifton, VA is assigned to Oak View Elementary School (elementary), rated A; Robinson Secondary School (middle), rated A. All sit in Fairfax County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 6610 Castle Knoll Dr, Clifton, VA compare to other homes in Clifton 20124?

Among the 5,002 homes in Clifton 20124, it is worth more than 79% of them ($1,303,614 against a typical $1,020,915), its price per square foot is higher than 90% of them ($476 against a typical $378), it is bigger than 51% of them (2,736 ft² against a typical 2,725 ft²), its lot is bigger than 86% of them (5 ac against a typical 0.28 ac) and it is newer than 10% of them (1976 against a typical 1989). Measured against all of Fairfax County, it is worth more than 87% 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 6610 Castle Knoll Dr, Clifton, VA?

The 2025 property tax bill for 6610 Castle Knoll Dr, Clifton, VA was $12,482. The county assessed it at $1,079,760.

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