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TownhouseResidential
$548,533$211 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $432,000 on Jan 2, 2020

511 GIRARD ST

GAITHERSBURG, MD 20877
3.5
Baths
2,600 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.
1,907 ft²
Lot SizeThe size of the land the home sits on, from county records.
2010
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$549K
$510K low$587K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$432,000 · Jan 2, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,649 (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.$493,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$142,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$351,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$464,767
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$493,700

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Townhouse
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.0.04
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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 · 72 ft²Porch · 80 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.

M
Gaithersburg Middle SchoolD+
Middle · Grades 6–8 · 0.4 mi
E
Gaithersburg Elementary SchoolD
Elementary · Grades PK–5 · 0.5 mi
H
Gaithersburg High SchoolD+
High · Grades 9–12 · 1.0 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20877These 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.124
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
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.38,931
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,116 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$84,983
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$109,325
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

511 Girard 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.

  • Worth more than 67% of homes in Gaithersburg 20877
  • Costs less per square foot than 90% of homes in Montgomery County
  • Bigger than 82% of homes in Gaithersburg 20877
  • Has a smaller lot than 79% of homes in Montgomery County
  • Newer than 97% of homes in Gaithersburg 20877

What homes are worth in Gaithersburg 20877

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

This home
$159K$797K

This home is worth more than 67% of homes in Gaithersburg 20877.

How it measures up in Gaithersburg 20877

The dot is this home. The mark in the middle is the typical home in Gaithersburg 20877.

Estimated value$548,533
CheaperTypical $462,302Pricier

Pricier than 67% of homes nearby

Price per ft²$211
CheaperTypical $252Pricier

Pricier than 21% of homes nearby

Living area2,600 ft²
SmallerTypical 1,715 ft²Bigger

Bigger than 82% of homes nearby

Lot size1,907 ft²
SmallerTypical 3,920 ft²Bigger

Bigger than 32% of homes nearby

Year built2010
OlderTypical 1980Newer

Newer than 97% of homes nearby

How 511 Girard St ranks against every home in each area.
MeasureThis homeGaithersburgGaithersburg 20877Montgomery County
Estimated valuepricier than$548,53356% of homes67% of homes39% of homes
Price per ft²pricier than$21113% of homes21% of homes10% of homes
Living areabigger than2,600 ft²78% of homes82% of homes69% of homes
Lot sizebigger than1,907 ft²28% of homes32% of homes21% of homes
Year builtnewer than201090% of homes97% of homes93% of homes

About 511 Girard St

How much is 511 Girard St, Gaithersburg, MD worth?

The TopHap Estimate for 511 Girard St, Gaithersburg, MD is $548,533 as of Oct 21, 2026. The likely range is $510,463 to $586,603. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 511 Girard St, Gaithersburg, MD last sell?

511 Girard St, Gaithersburg, MD last sold on Jan 2, 2020 for $432,000, according to the county's recorded deed.

How big is 511 Girard St, Gaithersburg, MD?

511 Girard St, Gaithersburg, MD has 3.5 bathrooms, 2,600 square feet of living space and a 0.04-acre lot.

When was 511 Girard St, Gaithersburg, MD built?

511 Girard St, Gaithersburg, MD was built in 2010, making it 16 years old. It is a townhouse home. The building has 3 stories.

What schools serve 511 Girard St, Gaithersburg, MD?

511 Girard St, Gaithersburg, MD is assigned to Gaithersburg Middle School (middle), rated D+; Gaithersburg Elementary School (elementary), 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 511 Girard St, Gaithersburg, MD compare to other homes in Gaithersburg 20877?

Among the 6,654 homes in Gaithersburg 20877, it is worth more than 67% of them ($548,533 against a typical $462,302), its price per square foot is higher than 21% of them ($211 against a typical $252), it is bigger than 82% of them (2,600 ft² against a typical 1,715 ft²), its lot is bigger than 32% of them (1,907 ft² against a typical 3,920 ft²) and it is newer than 97% of them (2010 against a typical 1980). Measured against all of Montgomery County, it is worth more than 39% 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 511 Girard St, Gaithersburg, MD?

The 2025 property tax bill for 511 Girard St, Gaithersburg, MD was $5,649. The county assessed it at $493,700.

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