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Single Family ResidenceResidential
$713,866$369 / 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 92How 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 $530,000 on Oct 15, 2019

400 MANNAKEE ST

ROCKVILLE, MD 20850
2
Baths
1,935 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.
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1963
Year BuiltThe year the home was originally built, according to county records.

Valuation

$714K
$659K low$769K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$530,000 · Oct 15, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,335 (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.$640,867 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$617,333
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$664,400

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.Split Foyer
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.26
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.Deck · 96 ft²

Transaction History(3)

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
Beall Elementary SchoolB
Elementary · Grades PK–5 · 0.3 mi
M
Julius West Middle SchoolA
Middle · Grades 6–8 · 1.0 mi
H
Richard Montgomery High SchoolA-
High · Grades 9–12 · 1.3 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%

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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 Mannakee St 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 74% of homes in Montgomery County
  • Has a bigger lot than 86% of homes in Rockville
  • Older than 83% of homes in Rockville 20850

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
$184K$1.7M

This home is worth more than 45% 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$713,866
CheaperTypical $760,608Pricier

Pricier than 45% of homes nearby

Price per ft²$369
CheaperTypical $341Pricier

Pricier than 65% of homes nearby

Living area1,935 ft²
SmallerTypical 2,040 ft²Bigger

Bigger than 46% of homes nearby

Lot size0.26 ac
SmallerTypical 4,312 ft²Bigger

Bigger than 80% of homes nearby

Year built1963
OlderTypical 1990Newer

Newer than 17% of homes nearby

How 400 Mannakee St ranks against every home in each area.
MeasureThis homeRockvilleRockville 20850Montgomery County
Estimated valuepricier than$713,86654% of homes45% of homes60% of homes
Price per ft²pricier than$36959% of homes65% of homes74% of homes
Living areabigger than1,935 ft²53% of homes46% of homes47% of homes
Lot sizebigger than0.26 ac86% of homes80% of homes72% of homes
Year builtnewer than196334% of homes17% of homes27% of homes

About 400 Mannakee St

How much is 400 Mannakee St, Rockville, MD worth?

The TopHap Estimate for 400 Mannakee St, Rockville, MD is $713,866 as of Aug 30, 2026. The likely range is $658,735 to $768,997. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 400 Mannakee St, Rockville, MD last sell?

400 Mannakee St, Rockville, MD last sold on Oct 15, 2019 for $530,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 400 Mannakee St, Rockville, MD?

400 Mannakee St, Rockville, MD has 2 bathrooms, 1,935 square feet of living space and a 0.26-acre lot.

When was 400 Mannakee St, Rockville, MD built?

400 Mannakee St, Rockville, MD was built in 1963, making it 63 years old. It is a split foyer home.

What schools serve 400 Mannakee St, Rockville, MD?

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

How does 400 Mannakee St, Rockville, MD compare to other homes in Rockville 20850?

Among the 14,094 homes in Rockville 20850, it is worth more than 45% of them ($713,866 against a typical $760,608), its price per square foot is higher than 65% of them ($369 against a typical $341), it is bigger than 46% of them (1,935 ft² against a typical 2,040 ft²), its lot is bigger than 80% of them (0.26 ac against a typical 4,312 ft²) and it is newer than 17% of them (1963 against a typical 1990). Measured against all of Montgomery County, it is worth more than 60% 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 Mannakee St, Rockville, MD?

The 2025 property tax bill for 400 Mannakee St, Rockville, MD was $8,335. The county assessed it at $640,867.

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