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Single Family ResidenceResidential
$674,995$787 / 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 $549,900 on Jan 9, 2023

400 MERCER RD

ROCKVILLE, MD 20852
2
Baths
858 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1955
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$675K
$633K low$717K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$549,900 · Jan 9, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,851 (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.$577,900 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$529,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$626,400

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.0.20
ConstructionThe main material the home's frame and walls are built from.Frame (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.Carport (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

H
Richard Montgomery High SchoolB
High · Grades 9–12 · 0.2 mi
E
Bayard Rustin Elementary SchoolB+
Elementary · Grades KG–5 · 0.4 mi
M
Julius West Middle SchoolB+
Middle · Grades 6–8 · 0.9 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

400 Mercer 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.

  • Among the highest price per square foot in Rockville
  • Smaller than 96% of homes in Rockville
  • Has a bigger lot than 75% of homes in Rockville 20852
  • Older than 95% 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 56% 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$674,995
CheaperTypical $624,533Pricier

Pricier than 56% of homes nearby

Price per ft²$787
CheaperTypical $364Pricier

Pricier than almost all homes nearby

Living area858 ft²
SmallerTypical 1,560 ft²Bigger

Bigger than 13% of homes nearby

Lot size0.2 ac
SmallerTypical 2,004 ft²Bigger

Bigger than 75% of homes nearby

Year built1955
OlderTypical 1980Newer

Newer than 5% of homes nearby

How 400 Mercer Rd ranks against every home in each area.
MeasureThis homeRockvilleRockville 20852Montgomery County
Estimated valuepricier than$674,99550% of homes56% of homes55% of homes
Price per ft²pricier than$787almost all homesalmost all homesalmost all homes
Living areabigger than858 ft²4% of homes13% of homes4% of homes
Lot sizebigger than0.2 ac68% of homes75% of homes60% of homes
Year builtnewer than195523% of homes5% of homes18% of homes

About 400 Mercer Rd

How much is 400 Mercer Rd, Rockville, MD worth?

The TopHap Estimate for 400 Mercer Rd, Rockville, MD is $674,995 as of Sep 24, 2026. The likely range is $632,940 to $717,050. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 400 Mercer Rd, Rockville, MD last sell?

400 Mercer Rd, Rockville, MD last sold on Jan 9, 2023 for $549,900, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 400 Mercer Rd, Rockville, MD?

400 Mercer Rd, Rockville, MD has 2 bathrooms, 858 square feet of living space and a 0.20-acre lot.

When was 400 Mercer Rd, Rockville, MD built?

400 Mercer Rd, Rockville, MD was built in 1955, making it 71 years old. It is a townhouse home. The building has 1 story.

What schools serve 400 Mercer Rd, Rockville, MD?

400 Mercer Rd, Rockville, MD is assigned to Richard Montgomery High School (high), rated B; Bayard Rustin Elementary School (elementary), rated B+; Julius West Middle School (middle), rated B+. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 400 Mercer Rd, Rockville, MD compare to other homes in Rockville 20852?

Among the 13,874 homes in Rockville 20852, it is worth more than 56% of them ($674,995 against a typical $624,533), its price per square foot is higher than almost all of them ($787 against a typical $364), it is bigger than 13% of them (858 ft² against a typical 1,560 ft²), its lot is bigger than 75% of them (0.2 ac against a typical 2,004 ft²) and it is newer than 5% of them (1955 against a typical 1980). Measured against all of Montgomery County, it is worth more than 55% 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 400 Mercer Rd, Rockville, MD?

The 2025 property tax bill for 400 Mercer Rd, Rockville, MD was $7,851. The county assessed it at $577,900.

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