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Single Family ResidenceResidential
$605,756$408 / 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 94How 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 $147,000 on Dec 19, 1997

4817 ERTTER DR

ROCKVILLE, MD 20852
2
Baths
1,484 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$606K
$571K low$641K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$147,000 · Dec 19, 1997

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,789 (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.$485,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$266,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$218,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$465,233
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$485,100

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.Townhouse
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.16
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
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.Patio · 144 ft²

Transaction History(2)

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
Viers Mill Elementary SchoolC
Elementary · Grades PK–5 · 0.8 mi
M
A. Mario Loiederman Middle SchoolD+
Middle · Grades 6–8 · 1.6 mi
H
Wheaton High SchoolB-
High · Grades 9–12 · 1.6 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20852These 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.128
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.36

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.96%
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.7.6%
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.51,764
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,168 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$117,549
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$148,499
Average tempThe average temperature here across a full year.55°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

4817 Ertter 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.

  • Costs more per square foot than 83% of homes in Montgomery County
  • Smaller than 71% of homes in Montgomery County
  • Has a bigger lot than 66% of homes in Rockville 20852
  • Older than 93% of homes in Rockville 20852

What homes are worth in Rockville 20852

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

This home
$171K$1.7M

This home is worth more than 49% of homes in Rockville 20852.

How it measures up in Rockville 20852

The dot is this home. The mark in the middle is the typical home in Rockville 20852.

Estimated value$605,756
CheaperTypical $622,591Pricier

Pricier than 49% of homes nearby

Price per ft²$408
CheaperTypical $363Pricier

Pricier than 72% of homes nearby

Living area1,484 ft²
SmallerTypical 1,565 ft²Bigger

Bigger than 47% of homes nearby

Lot size0.16 ac
SmallerTypical 2,047 ft²Bigger

Bigger than 66% of homes nearby

Year built1956
OlderTypical 1980Newer

Newer than 7% of homes nearby

How 4817 Ertter Dr ranks against every home in each area.
MeasureThis homeRockville 20852Montgomery County
Estimated valuepricier than$605,75649% of homes47% of homes
Price per ft²pricier than$40872% of homes83% of homes
Living areabigger than1,484 ft²47% of homes29% of homes
Lot sizebigger than0.16 ac66% of homes49% of homes
Year builtnewer than19567% of homes19% of homes

About 4817 Ertter Dr

How much is 4817 Ertter Dr, Rockville, MD worth?

The TopHap Estimate for 4817 Ertter Dr, Rockville, MD is $605,756 as of Sep 24, 2026. The likely range is $570,894 to $640,618. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4817 Ertter Dr, Rockville, MD last sell?

4817 Ertter Dr, Rockville, MD last sold on Dec 19, 1997 for $147,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4817 Ertter Dr, Rockville, MD?

4817 Ertter Dr, Rockville, MD has 2 bathrooms, 1,484 square feet of living space and a 0.16-acre lot.

When was 4817 Ertter Dr, Rockville, MD built?

4817 Ertter Dr, Rockville, MD was built in 1956, making it 70 years old. It is a townhouse home. The building has 1 story.

What schools serve 4817 Ertter Dr, Rockville, MD?

4817 Ertter Dr, Rockville, MD is assigned to Viers Mill Elementary School (elementary), rated C; A. Mario Loiederman Middle School (middle), rated D+; Wheaton High School (high), rated B-. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4817 Ertter Dr, Rockville, MD compare to other homes in Rockville 20852?

Among the 13,874 homes in Rockville 20852, it is worth more than 49% of them ($605,756 against a typical $622,591), its price per square foot is higher than 72% of them ($408 against a typical $363), it is bigger than 47% of them (1,484 ft² against a typical 1,565 ft²), its lot is bigger than 66% of them (0.16 ac against a typical 2,047 ft²) and it is newer than 7% of them (1956 against a typical 1980). Measured against all of Montgomery County, it is worth more than 47% 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 4817 Ertter Dr, Rockville, MD?

The 2025 property tax bill for 4817 Ertter Dr, Rockville, MD was $1,789. The county assessed it at $485,100.

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