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Single Family ResidenceResidential
$941,242$248 / 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 $820,000 on Aug 12, 2005

20312 ROSETHORN AVE

GAITHERSBURG, MD 20882
3.5
Baths
3,799 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.
0.92 ac
Lot SizeThe size of the land the home sits on, from county records.
1996
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$941K
$870K low$1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$820,000 · Aug 12, 2005

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,857 (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.$813,400 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$238,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$575,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$757,533
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$813,400

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.Bi-Level
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.92
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.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(4)

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
Laytonsville Elementary SchoolB-
Elementary · Grades KG–5 · 1.4 mi
M
Gaithersburg Middle SchoolD
Middle · Grades 6–8 · 3.7 mi
H
Gaithersburg High SchoolD
High · Grades 9–12 · 4.3 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20882These 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.41
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.37

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.98%
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.3.7%
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.15,506
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.399 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$161,536
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$196,165
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.45 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

20312 Rosethorn 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 77% of homes in Montgomery County
  • Costs less per square foot than 77% of homes in Montgomery County
  • Bigger than 87% of homes in Montgomery County
  • Has a bigger lot than 94% of homes in Montgomery County
  • Newer than 81% of homes in Montgomery County

What homes are worth in Gaithersburg 20882

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

This home
$381K$1.5M

This home is worth more than 69% of homes in Gaithersburg 20882.

How it measures up in Gaithersburg 20882

The dot is this home. The mark in the middle is the typical home in Gaithersburg 20882.

Estimated value$941,242
CheaperTypical $772,041Pricier

Pricier than 69% of homes nearby

Price per ft²$248
CheaperTypical $253Pricier

Pricier than 45% of homes nearby

Living area3,799 ft²
SmallerTypical 3,054 ft²Bigger

Bigger than 65% of homes nearby

Lot size0.92 ac
SmallerTypical 1.34 acBigger

Bigger than 35% of homes nearby

Year built1996
OlderTypical 1986Newer

Newer than 79% of homes nearby

How 20312 Rosethorn Ave ranks against every home in each area.
MeasureThis homeGaithersburg 20882Montgomery County
Estimated valuepricier than$941,24269% of homes77% of homes
Price per ft²pricier than$24845% of homes23% of homes
Living areabigger than3,799 ft²65% of homes87% of homes
Lot sizebigger than0.92 ac35% of homes94% of homes
Year builtnewer than199679% of homes81% of homes

About 20312 Rosethorn Ave

How much is 20312 Rosethorn Ave, Gaithersburg, MD worth?

The TopHap Estimate for 20312 Rosethorn Ave, Gaithersburg, MD is $941,242 as of Aug 30, 2026. The likely range is $870,178 to $1,012,306. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20312 Rosethorn Ave, Gaithersburg, MD last sell?

20312 Rosethorn Ave, Gaithersburg, MD last sold on Aug 12, 2005 for $820,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 20312 Rosethorn Ave, Gaithersburg, MD?

20312 Rosethorn Ave, Gaithersburg, MD has 3.5 bathrooms, 3,799 square feet of living space and a 0.92-acre lot.

When was 20312 Rosethorn Ave, Gaithersburg, MD built?

20312 Rosethorn Ave, Gaithersburg, MD was built in 1996, making it 30 years old. It is a bi-level home. The building has 2 stories.

What schools serve 20312 Rosethorn Ave, Gaithersburg, MD?

20312 Rosethorn Ave, Gaithersburg, MD is assigned to Laytonsville Elementary School (elementary), rated B-; Gaithersburg 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 20312 Rosethorn Ave, Gaithersburg, MD compare to other homes in Gaithersburg 20882?

Among the 4,551 homes in Gaithersburg 20882, it is worth more than 69% of them ($941,242 against a typical $772,041), its price per square foot is higher than 45% of them ($248 against a typical $253), it is bigger than 65% of them (3,799 ft² against a typical 3,054 ft²), its lot is bigger than 35% of them (0.92 ac against a typical 1.34 ac) and it is newer than 79% of them (1996 against a typical 1986). Measured against all of Montgomery County, it is worth more than 77% 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 20312 Rosethorn Ave, Gaithersburg, MD?

The 2025 property tax bill for 20312 Rosethorn Ave, Gaithersburg, MD was $8,857. The county assessed it at $813,400.

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