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Single Family ResidenceResidential
$748,801$244 / 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 Aug 30, 2026

311 HIGHLAND RIDGE AVE

GAITHERSBURG, MD 20878
3.5
Baths
3,068 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.
3,038 ft²
Lot SizeThe size of the land the home sits on, from county records.
1997
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$749K
$694K low$804K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,980 (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.$685,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$239,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$446,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$648,933
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$685,700

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.Bi-Level
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.07
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.Garage, Attached
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.

M
Lakelands Park Middle SchoolB-
Middle · Grades 6–8 · 0.9 mi
E
Diamond Elementary SchoolA
Elementary · Grades KG–5 · 0.9 mi
H
Northwest High SchoolB+
High · Grades 9–12 · 3.3 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20878These 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.62
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 100.42

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.9%
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.66,167
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,976 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$145,457
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$176,656
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

311 Highland Ridge Ave 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 78% of homes in Gaithersburg
  • Costs less per square foot than 87% of homes in Gaithersburg 20878
  • Bigger than 87% of homes in Gaithersburg
  • Has a smaller lot than 67% of homes in Montgomery County
  • Newer than 82% of homes in Montgomery County

What homes are worth in Gaithersburg 20878

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

This home
$172K$1.6M

This home is worth more than 52% of homes in Gaithersburg 20878.

How it measures up in Gaithersburg 20878

The dot is this home. The mark in the middle is the typical home in Gaithersburg 20878.

Estimated value$748,801
CheaperTypical $733,777Pricier

Pricier than 52% of homes nearby

Price per ft²$244
CheaperTypical $306Pricier

Pricier than 13% of homes nearby

Living area3,068 ft²
SmallerTypical 2,254 ft²Bigger

Bigger than 73% of homes nearby

Lot size3,038 ft²
SmallerTypical 0.11 acBigger

Bigger than 42% of homes nearby

Year built1997
OlderTypical 1988Newer

Newer than 74% of homes nearby

How 311 Highland Ridge Ave ranks against every home in each area.
MeasureThis homeGaithersburgGaithersburg 20878Montgomery County
Estimated valuepricier than$748,80178% of homes52% of homes63% of homes
Price per ft²pricier than$24423% of homes13% of homes21% of homes
Living areabigger than3,068 ft²87% of homes73% of homes78% of homes
Lot sizebigger than3,038 ft²59% of homes42% of homes33% of homes
Year builtnewer than199771% of homes74% of homes82% of homes

About 311 Highland Ridge Ave

How much is 311 Highland Ridge Ave, Gaithersburg, MD worth?

The TopHap Estimate for 311 Highland Ridge Ave, Gaithersburg, MD is $748,801 as of Aug 30, 2026. The likely range is $693,886 to $803,716. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 311 Highland Ridge Ave, Gaithersburg, MD last sell?

311 Highland Ridge Ave, Gaithersburg, MD last sold on May 14, 2009, according to the county's recorded deed.

How big is 311 Highland Ridge Ave, Gaithersburg, MD?

311 Highland Ridge Ave, Gaithersburg, MD has 3.5 bathrooms, 3,068 square feet of living space and a 0.07-acre lot.

When was 311 Highland Ridge Ave, Gaithersburg, MD built?

311 Highland Ridge Ave, Gaithersburg, MD was built in 1997, making it 29 years old. It is a bi-level home. The building has 2 stories.

What schools serve 311 Highland Ridge Ave, Gaithersburg, MD?

311 Highland Ridge Ave, Gaithersburg, MD is assigned to Lakelands Park Middle School (middle), rated B-; Diamond Elementary School (elementary), rated A; Northwest 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 311 Highland Ridge Ave, Gaithersburg, MD compare to other homes in Gaithersburg 20878?

Among the 20,757 homes in Gaithersburg 20878, it is worth more than 52% of them ($748,801 against a typical $733,777), its price per square foot is higher than 13% of them ($244 against a typical $306), it is bigger than 73% of them (3,068 ft² against a typical 2,254 ft²), its lot is bigger than 42% of them (3,038 ft² against a typical 0.11 ac) and it is newer than 74% of them (1997 against a typical 1988). Measured against all of Montgomery County, it is worth more than 63% 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 311 Highland Ridge Ave, Gaithersburg, MD?

The 2025 property tax bill for 311 Highland Ridge Ave, Gaithersburg, MD was $7,980. The county assessed it at $685,700.

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