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CondominiumResidential
$738,847$290 / 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 98How 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 $690,000 on Aug 9, 2023

831 ROCKWELL AVE

GAITHERSBURG, MD 20878
0
Baths
2,548 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.
2021
Year BuiltThe year the home was originally built, according to county records.

Valuation

$739K
$722K low$756K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$690,000 · Aug 9, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,739 (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.$660,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$198,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$462,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$650,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$660,000

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.10
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
16
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.
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.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyMONTGOMERY
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Rosemont Elementary SchoolC
Elementary · Grades PK–5 · 1.2 mi
H
Gaithersburg High SchoolD
High · Grades 9–12 · 1.7 mi
M
Forest Oak Middle SchoolD-
Middle · Grades 6–8 · 3.0 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20878These 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.62
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 100.42

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.4.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.66,167
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,976 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$145,457
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$176,656
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%

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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

831 Rockwell Ave 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 77% of homes in Gaithersburg
  • Bigger than 76% of homes in Gaithersburg
  • Among the newest homes in Gaithersburg

What homes are worth in Gaithersburg 20878

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

This home
$178K$1.6M

This home is worth more than 51% of homes in Gaithersburg 20878.

How it measures up in Gaithersburg 20878

The dot is this home. The mark in the middle is the typical home in Gaithersburg 20878.

Estimated value$738,847
CheaperTypical $733,703Pricier

Pricier than 51% of homes nearby

Price per ft²$290
CheaperTypical $307Pricier

Pricier than 39% of homes nearby

Living area2,548 ft²
SmallerTypical 2,265 ft²Bigger

Bigger than 60% of homes nearby

Year built2021
OlderTypical 1988Newer

Newer than almost all homes nearby

How 831 Rockwell Ave ranks against every home in each area.
MeasureThis homeGaithersburgGaithersburg 20878Montgomery County
Estimated valuepricier than$738,84777% of homes51% of homes62% of homes
Price per ft²pricier than$29052% of homes39% of homes44% of homes
Living areabigger than2,548 ft²76% of homes60% of homes68% of homes
Year builtnewer than2021almost all homesalmost all homesalmost all homes

About 831 Rockwell Ave

How much is 831 Rockwell Ave, Gaithersburg, MD worth?

The TopHap Estimate for 831 Rockwell Ave, Gaithersburg, MD is $738,847 as of Aug 30, 2026. The likely range is $721,680 to $756,014. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 831 Rockwell Ave, Gaithersburg, MD last sell?

831 Rockwell Ave, Gaithersburg, MD last sold on Aug 9, 2023 for $690,000, according to the county's recorded deed.

When was 831 Rockwell Ave, Gaithersburg, MD built?

831 Rockwell Ave, Gaithersburg, MD was built in 2021, making it 5 years old. It is a condo/apartment home.

What schools serve 831 Rockwell Ave, Gaithersburg, MD?

831 Rockwell Ave, Gaithersburg, MD is assigned to Rosemont Elementary School (elementary), rated C; Gaithersburg High School (high), rated D; Forest Oak 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 Rockwell Ave, Gaithersburg, MD compare to other homes in Gaithersburg 20878?

Among the 20,757 homes in Gaithersburg 20878, it is worth more than 51% of them ($738,847 against a typical $733,703), its price per square foot is higher than 39% of them ($290 against a typical $307), it is bigger than 60% of them (2,548 ft² against a typical 2,265 ft²) and it is newer than almost all of them (2021 against a typical 1988). Measured against all of Montgomery County, it is worth more than 62% 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 Rockwell Ave, Gaithersburg, MD?

The 2025 property tax bill for 831 Rockwell Ave, Gaithersburg, MD was $8,739. The county assessed it at $660,000.

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Assigned schools

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