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TownhouseResidential
$685,202$289 / 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 Jun 23, 2026
Last sold for $700,186 on Sep 6, 2024

831 KING FARM BLVD

ROCKVILLE, MD 20850
3.5
Baths
2,368 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.
920 ft²
Lot SizeThe size of the land the home sits on, from county records.
2024
Year BuiltThe year the home was originally built, according to county records.
4
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$685K
$637K low$733K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$700,186 · Sep 6, 2024
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.$685,202
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$548,162

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,845 (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.$690,800 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$190,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$748,800

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.24
77
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
13
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
34
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.61 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.Townhouse
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.02
ConstructionThe main material the home's frame and walls are built from.Brick
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 192 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
Washington Grove Elementary SchoolC+
Elementary · Grades PK–5 · 1.5 mi
H
Gaithersburg High SchoolD
High · Grades 9–12 · 1.9 mi
M
Gaithersburg Middle SchoolD
Middle · Grades 6–8 · 2.3 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20850These 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.104
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.40

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.8%
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.51,693
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,703 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,425
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$154,183
Average tempThe average temperature here across a full year.54°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.57%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
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

831 King Farm Blvd 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.

  • Costs less per square foot than 83% of homes in Rockville
  • Bigger than 70% of homes in Rockville
  • Has a smaller lot than 94% of homes in Montgomery County
  • Among the newest homes in Rockville

What homes are worth in Rockville 20850

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

This home
$179K$1.6M

This home is worth more than 43% of homes in Rockville 20850.

How it measures up in Rockville 20850

The dot is this home. The mark in the middle is the typical home in Rockville 20850.

Estimated value$685,202
CheaperTypical $749,306Pricier

Pricier than 43% of homes nearby

Price per ft²$289
CheaperTypical $339Pricier

Pricier than 20% of homes nearby

Living area2,368 ft²
SmallerTypical 2,022 ft²Bigger

Bigger than 62% of homes nearby

Lot size920 ft²
SmallerTypical 0.11 acBigger

Bigger than 11% of homes nearby

Year built2024
OlderTypical 1989Newer

Newer than almost all homes nearby

How 831 King Farm Blvd ranks against every home in each area.
MeasureThis homeRockvilleRockville 20850Montgomery County
Estimated valuepricier than$685,20253% of homes43% of homes57% of homes
Price per ft²pricier than$28917% of homes20% of homes42% of homes
Living areabigger than2,368 ft²70% of homes62% of homes63% of homes
Lot sizebigger than920 ft²8% of homes11% of homes6% of homes
Year builtnewer than2024almost all homesalmost all homesalmost all homes

About 831 King Farm Blvd

How much is 831 King Farm Blvd, Rockville, MD worth?

The TopHap Estimate for 831 King Farm Blvd, Rockville, MD is $685,202 as of Jun 23, 2026. The likely range is $637,237 to $733,166. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 831 King Farm Blvd, Rockville, MD last sell?

831 King Farm Blvd, Rockville, MD last sold on Sep 6, 2024 for $700,186, according to the county's recorded deed.

How big is 831 King Farm Blvd, Rockville, MD?

831 King Farm Blvd, Rockville, MD has 3.5 bathrooms, 2,368 square feet of living space and a 0.02-acre lot.

When was 831 King Farm Blvd, Rockville, MD built?

831 King Farm Blvd, Rockville, MD was built in 2024, making it 2 years old. It is a townhouse home. The building has 4 stories.

What schools serve 831 King Farm Blvd, Rockville, MD?

831 King Farm Blvd, Rockville, MD is assigned to Washington Grove Elementary School (elementary), rated C+; Gaithersburg High School (high), rated D; Gaithersburg Middle School (middle), rated D. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 831 King Farm Blvd, Rockville, MD compare to other homes in Rockville 20850?

Among the 13,722 homes in Rockville 20850, it is worth more than 43% of them ($685,202 against a typical $749,306), its price per square foot is higher than 20% of them ($289 against a typical $339), it is bigger than 62% of them (2,368 ft² against a typical 2,022 ft²), its lot is bigger than 11% of them (920 ft² against a typical 0.11 ac) and it is newer than almost all of them (2024 against a typical 1989). Measured against all of Montgomery County, it is worth more than 57% 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 831 King Farm Blvd, Rockville, MD?

The 2025 property tax bill for 831 King Farm Blvd, Rockville, MD was $9,845. The county assessed it at $690,800.

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