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Single Family ResidenceResidential
$533,671$463 / 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 85How 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 $397,000 on Jun 4, 2020

8420 ROCKY RD

GAITHERSBURG, MD 20882
2
Baths
1,152 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 ac
Lot SizeThe size of the land the home sits on, from county records.
1947
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$534K
$454K low$614K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$397,000 · Jun 4, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,090 (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.$449,300 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$192,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$257,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$425,067
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$449,300

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.
17
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.Single Family Residence
CountyMONTGOMERY
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.Yes
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, Detached
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.Shed · 400 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
Laytonsville Elementary SchoolB-
Elementary · Grades KG–5 · 2.3 mi
M
Gaithersburg Middle SchoolD
Middle · Grades 6–8 · 5.9 mi
H
Gaithersburg High SchoolD
High · Grades 9–12 · 6.5 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20882These 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.41
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.37

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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.7%
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.15,506
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.399 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$161,536
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$196,165
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.45 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

8420 Rocky Rd 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 less than 82% of homes in Gaithersburg 20882
  • Among the highest price per square foot in Gaithersburg 20882
  • Smaller than 96% of homes in Gaithersburg 20882
  • Has a bigger lot than 95% of homes in Montgomery County
  • Older than 96% of homes in Gaithersburg 20882

What homes are worth in Gaithersburg 20882

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

This home
$371K$1.4M

This home is worth more than 18% of homes in Gaithersburg 20882.

How it measures up in Gaithersburg 20882

The dot is this home. The mark in the middle is the typical home in Gaithersburg 20882.

Estimated value$533,671
CheaperTypical $767,955Pricier

Pricier than 18% of homes nearby

Price per ft²$463
CheaperTypical $253Pricier

Pricier than almost all homes nearby

Living area1,152 ft²
SmallerTypical 3,044 ft²Bigger

Bigger than 4% of homes nearby

Lot size1 ac
SmallerTypical 1.32 acBigger

Bigger than 39% of homes nearby

Year built1947
OlderTypical 1986Newer

Newer than 4% of homes nearby

How 8420 Rocky Rd ranks against every home in each area.
MeasureThis homeGaithersburg 20882Montgomery County
Estimated valuepricier than$533,67118% of homes37% of homes
Price per ft²pricier than$463almost all homes90% of homes
Living areabigger than1,152 ft²4% of homes13% of homes
Lot sizebigger than1 ac39% of homes95% of homes
Year builtnewer than19474% of homes7% of homes

About 8420 Rocky Rd

How much is 8420 Rocky Rd, Gaithersburg, MD worth?

The TopHap Estimate for 8420 Rocky Rd, Gaithersburg, MD is $533,671 as of Aug 30, 2026. The likely range is $453,795 to $613,547. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 8420 Rocky Rd, Gaithersburg, MD last sell?

8420 Rocky Rd, Gaithersburg, MD last sold on Jun 4, 2020 for $397,000, according to the county's recorded deed.

How big is 8420 Rocky Rd, Gaithersburg, MD?

8420 Rocky Rd, Gaithersburg, MD has 2 bathrooms and 1,152 square feet of living space.

When was 8420 Rocky Rd, Gaithersburg, MD built?

8420 Rocky Rd, Gaithersburg, MD was built in 1947, making it 79 years old. The building has 1 story.

What schools serve 8420 Rocky Rd, Gaithersburg, MD?

8420 Rocky Rd, Gaithersburg, MD is assigned to Laytonsville Elementary School (elementary), rated B-; Gaithersburg Middle School (middle), rated D; Gaithersburg High School (high), rated D. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 8420 Rocky Rd, Gaithersburg, MD compare to other homes in Gaithersburg 20882?

Among the 4,551 homes in Gaithersburg 20882, it is worth more than 18% of them ($533,671 against a typical $767,955), its price per square foot is higher than almost all of them ($463 against a typical $253), it is bigger than 4% of them (1,152 ft² against a typical 3,044 ft²), its lot is bigger than 39% of them (1 ac against a typical 1.32 ac) and it is newer than 4% of them (1947 against a typical 1986). Measured against all of Montgomery County, it is worth more than 37% 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 8420 Rocky Rd, Gaithersburg, MD?

The 2025 property tax bill for 8420 Rocky Rd, Gaithersburg, MD was $5,090. The county assessed it at $449,300.

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