Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$3,869,423$561 / 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 90How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $1,200,000 on Jul 16, 2018

9817 MILL RUN DR

GREAT FALLS, VA 22066
5
Beds
6.5
Baths
6,892 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.
1.47 ac
Lot SizeThe size of the land the home sits on, from county records.
2003
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$3.9M
$3.5M low$4.3M 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 · Jul 16, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$38,192 (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.$3,303,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$827,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,476,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$3,287,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$3,303,800

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
CountyFAIRFAX
Lot (acres)The size of the land the home sits on, from county records.1.47
ConstructionThe main material the home's frame and walls are built from.Wood (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, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
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.Deck · 495 ft²Patio · 962 ft²Porch · 971 ft²

Transaction History(7)

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
Colvin Run Elementary SchoolA+
Elementary · Grades PK–6 · 2.1 mi
M
Cooper Middle SchoolA+
Middle · Grades 7–8 · 5.2 mi
H
Langley High SchoolA+
High · Grades 9–12 · 6.6 mi

District: Fairfax County Public Schools

Neighborhood · ZIP 22066These 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.45
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.80
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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.9%
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.18,712
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.706 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$238,115
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$308,878
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.63%

Owner Tools

Do you own this home?
Claim this home

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

9817 Mill 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.

  • Among the most valuable homes in Fairfax County
  • Costs more per square foot than 84% of homes in Fairfax County
  • Among the largest homes in Fairfax County
  • Has a bigger lot than 96% of homes in Fairfax County
  • Newer than 89% of homes in Fairfax County

What homes are worth in Great Falls 22066

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

This home
$790K$4.5M

This home is worth more than 96% of homes in Great Falls 22066.

How it measures up in Great Falls 22066

The dot is this home. The mark in the middle is the typical home in Great Falls 22066.

Estimated value$3,869,423
CheaperTypical $1,704,340Pricier

Pricier than 96% of homes nearby

Price per ft²$561
CheaperTypical $482Pricier

Pricier than 75% of homes nearby

Living area6,892 ft²
SmallerTypical 3,576 ft²Bigger

Bigger than 93% of homes nearby

Lot size1.47 ac
SmallerTypical 1.21 acBigger

Bigger than 53% of homes nearby

Year built2003
OlderTypical 1986Newer

Newer than 86% of homes nearby

How 9817 Mill Run Dr ranks against every home in each area.
MeasureThis homeGreat Falls 22066Fairfax County
Estimated valuepricier than$3,869,42396% of homesalmost all homes
Price per ft²pricier than$56175% of homes84% of homes
Living areabigger than6,892 ft²93% of homesalmost all homes
Lot sizebigger than1.47 ac53% of homes96% of homes
Year builtnewer than200386% of homes89% of homes

About 9817 Mill Run Dr

How much is 9817 Mill Run Dr, Great Falls, VA worth?

The TopHap Estimate for 9817 Mill Run Dr, Great Falls, VA is $3,869,423 as of Aug 30, 2026. The likely range is $3,484,290 to $4,254,556. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9817 Mill Run Dr, Great Falls, VA last sell?

9817 Mill Run Dr, Great Falls, VA last sold on Jul 16, 2018 for $1,200,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 9817 Mill Run Dr, Great Falls, VA?

9817 Mill Run Dr, Great Falls, VA has 5 bedrooms, 6.5 bathrooms, 6,892 square feet of living space and a 1.47-acre lot.

When was 9817 Mill Run Dr, Great Falls, VA built?

9817 Mill Run Dr, Great Falls, VA was built in 2003, making it 23 years old. It is a bi-level home. The building has 2 stories.

What schools serve 9817 Mill Run Dr, Great Falls, VA?

9817 Mill Run Dr, Great Falls, VA is assigned to Colvin Run Elementary School (elementary), rated A+; Cooper Middle School (middle), rated A+; Langley High School (high), rated A+. All sit in Fairfax County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9817 Mill Run Dr, Great Falls, VA compare to other homes in Great Falls 22066?

Among the 6,206 homes in Great Falls 22066, it is worth more than 96% of them ($3,869,423 against a typical $1,704,340), its price per square foot is higher than 75% of them ($561 against a typical $482), it is bigger than 93% of them (6,892 ft² against a typical 3,576 ft²), its lot is bigger than 53% of them (1.47 ac against a typical 1.21 ac) and it is newer than 86% of them (2003 against a typical 1986). Measured against all of Fairfax County, it is worth more than almost all 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 9817 Mill Run Dr, Great Falls, VA?

The 2025 property tax bill for 9817 Mill Run Dr, Great Falls, VA was $38,192. The county assessed it at $3,303,800.

More homes on Mill Run Dr

Closest homes

More homes in Great Falls 22066

Assigned schools

Explore the area

See this home in context

Open 9817 Mill Run Dr on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map