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TownhouseResidential
$680,964$377 / 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 97How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $310,000 on Feb 15, 2011

6407 KNAPSACK LN

CENTREVILLE, VA 20121
4
Beds
4 / 1
Baths
1,804 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.
2,380 ft²
Lot SizeThe size of the land the home sits on, from county records.
1995
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$681K
$662K low$700K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$310,000 · Feb 15, 2011

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,860 (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.$593,420 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$175,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$418,420
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$579,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$593,420

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Townhouse
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.0.06
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.Forced Air
CoolingThe type of cooling or air conditioning in the home.Yes
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 · 220 ft²Patio · 220 ft²Porch · 60 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.

E
Centre Ridge Elementary SchoolD+
Elementary · Grades PK–6 · 0.2 mi
H
Centreville High SchoolB+
High · Grades 9–12 · 1.8 mi
M
Liberty Middle SchoolB+
Middle · Grades 7–8 · 2.1 mi

District: Fairfax County Public Schools

Neighborhood · ZIP 20121These 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.70
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
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.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.29,165
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,182 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$127,130
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$143,940
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%

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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

6407 Knapsack Ln 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 Centreville 20121
  • Costs less per square foot than 72% of homes in Fairfax County
  • Bigger than 79% of homes in Centreville 20121
  • Has a smaller lot than 77% of homes in Fairfax County
  • Newer than 80% of homes in Centreville 20121

What homes are worth in Centreville 20121

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

This home
$281K$1.1M

This home is worth more than 76% of homes in Centreville 20121.

How it measures up in Centreville 20121

The dot is this home. The mark in the middle is the typical home in Centreville 20121.

Estimated value$680,964
CheaperTypical $579,802Pricier

Pricier than 76% of homes nearby

Price per ft²$377
CheaperTypical $398Pricier

Pricier than 35% of homes nearby

Living area1,804 ft²
SmallerTypical 1,408 ft²Bigger

Bigger than 79% of homes nearby

Lot size2,380 ft²
SmallerTypical 2,004 ft²Bigger

Bigger than 61% of homes nearby

Year built1995
OlderTypical 1991Newer

Newer than 80% of homes nearby

How 6407 Knapsack Ln ranks against every home in each area.
MeasureThis homeCentreville 20121Fairfax County
Estimated valuepricier than$680,96476% of homes39% of homes
Price per ft²pricier than$37735% of homes28% of homes
Living areabigger than1,804 ft²79% of homes58% of homes
Lot sizebigger than2,380 ft²61% of homes23% of homes
Year builtnewer than199580% of homes79% of homes

About 6407 Knapsack Ln

How much is 6407 Knapsack Ln, Centreville, VA worth?

The TopHap Estimate for 6407 Knapsack Ln, Centreville, VA is $680,964 as of Sep 24, 2026. The likely range is $662,356 to $699,572. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 6407 Knapsack Ln, Centreville, VA last sell?

6407 Knapsack Ln, Centreville, VA last sold on Feb 15, 2011 for $310,000, according to the county's recorded deed.

How big is 6407 Knapsack Ln, Centreville, VA?

6407 Knapsack Ln, Centreville, VA has 4 bedrooms, 4 bathrooms, 1,804 square feet of living space and a 0.06-acre lot.

When was 6407 Knapsack Ln, Centreville, VA built?

6407 Knapsack Ln, Centreville, VA was built in 1995, making it 31 years old. It is a split level home. The building has 2 stories.

What schools serve 6407 Knapsack Ln, Centreville, VA?

6407 Knapsack Ln, Centreville, VA is assigned to Centre Ridge Elementary School (elementary), rated D+; Centreville High School (high), rated B+; Liberty Middle School (middle), rated B+. All sit in Fairfax County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 6407 Knapsack Ln, Centreville, VA compare to other homes in Centreville 20121?

Among the 8,274 homes in Centreville 20121, it is worth more than 76% of them ($680,964 against a typical $579,802), its price per square foot is higher than 35% of them ($377 against a typical $398), it is bigger than 79% of them (1,804 ft² against a typical 1,408 ft²), its lot is bigger than 61% of them (2,380 ft² against a typical 2,004 ft²) and it is newer than 80% of them (1995 against a typical 1991). Measured against all of Fairfax County, it is worth more than 39% 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 6407 Knapsack Ln, Centreville, VA?

The 2025 property tax bill for 6407 Knapsack Ln, Centreville, VA was $6,860. The county assessed it at $593,420.

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