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TownhouseResidential
$385,505$321 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $229,500 on Jun 4, 2010

51 PORTSIDE CT

GAITHERSBURG, MD 20877
2.5
Baths
1,200 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.
2,213 ft²
Lot SizeThe size of the land the home sits on, from county records.
1985
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$386K
$371K low$400K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$229,500 · Jun 4, 2010
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$156,505
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$125,204
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.65%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$229,000
EAGLE BANK · recorded Jun 15, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,693 (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.$347,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$150,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$197,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$319,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$347,700

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.0.05
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 · 100 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
Harriet R. Tubman Elementary SchoolD+
Elementary · Grades PK–5 · 0.1 mi
M
Forest Oak Middle SchoolD-
Middle · Grades 6–8 · 0.7 mi
H
Gaithersburg High SchoolD
High · Grades 9–12 · 0.7 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

51 Portside Ct 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 83% of homes in Montgomery County
  • Costs more per square foot than 86% of homes in Gaithersburg 20877
  • Smaller than 85% of homes in Gaithersburg
  • Has a smaller lot than 74% of homes in Montgomery County
  • Newer than 65% 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
$167K$800K

This home is worth more than 28% 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$385,505
CheaperTypical $479,630Pricier

Pricier than 28% of homes nearby

Price per ft²$321
CheaperTypical $261Pricier

Pricier than 86% of homes nearby

Living area1,200 ft²
SmallerTypical 1,715 ft²Bigger

Bigger than 17% of homes nearby

Lot size2,213 ft²
SmallerTypical 3,920 ft²Bigger

Bigger than 38% of homes nearby

Year built1985
OlderTypical 1980Newer

Newer than 65% of homes nearby

How 51 Portside Ct ranks against every home in each area.
MeasureThis homeGaithersburgGaithersburg 20877Montgomery County
Estimated valuepricier than$385,50520% of homes28% of homes17% of homes
Price per ft²pricier than$32168% of homes86% of homes57% of homes
Living areabigger than1,200 ft²15% of homes17% of homes16% of homes
Lot sizebigger than2,213 ft²42% of homes38% of homes26% of homes
Year builtnewer than198546% of homes65% of homes63% of homes

About 51 Portside Ct

How much is 51 Portside Ct, Gaithersburg, MD worth?

The TopHap Estimate for 51 Portside Ct, Gaithersburg, MD is $385,505 as of Jul 14, 2026. The likely range is $371,422 to $399,588. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 51 Portside Ct, Gaithersburg, MD last sell?

51 Portside Ct, Gaithersburg, MD last sold on Jun 4, 2010 for $229,500, according to the county's recorded deed.

How big is 51 Portside Ct, Gaithersburg, MD?

51 Portside Ct, Gaithersburg, MD has 2.5 bathrooms, 1,200 square feet of living space and a 0.05-acre lot.

When was 51 Portside Ct, Gaithersburg, MD built?

51 Portside Ct, Gaithersburg, MD was built in 1985, making it 41 years old. It is a townhouse home. The building has 2 stories.

What schools serve 51 Portside Ct, Gaithersburg, MD?

51 Portside Ct, Gaithersburg, MD is assigned to Harriet R. Tubman Elementary School (elementary), rated D+; Forest Oak 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 51 Portside Ct, Gaithersburg, MD compare to other homes in Gaithersburg 20877?

Among the 6,654 homes in Gaithersburg 20877, it is worth more than 28% of them ($385,505 against a typical $479,630), its price per square foot is higher than 86% of them ($321 against a typical $261), it is bigger than 17% of them (1,200 ft² against a typical 1,715 ft²), its lot is bigger than 38% of them (2,213 ft² against a typical 3,920 ft²) and it is newer than 65% of them (1985 against a typical 1980). Measured against all of Montgomery County, it is worth more than 17% 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 51 Portside Ct, Gaithersburg, MD?

The 2025 property tax bill for 51 Portside Ct, Gaithersburg, MD was $3,693. The county assessed it at $347,700.

Closest homes

More homes in Gaithersburg 20877

Assigned schools

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