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Single Family ResidenceResidential
$633,264$296 / 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 97How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $470,000 on Jan 12, 2023

3909 MOUNT OLNEY LN

OLNEY, MD 20832
2
Baths
2,140 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.
0.34 ac
Lot SizeThe size of the land the home sits on, from county records.
1970
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$633K
$617K low$650K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$470,000 · Jan 12, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,578 (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.$548,400 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$518,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$608,000

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.Townhouse
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.34
ConstructionThe main material the home's frame and walls are built from.Brick
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.Carport (Unspecified)
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
Rosa M. Parks Middle SchoolA
Middle · Grades 6–8 · 0.2 mi
E
Belmont Elementary SchoolA-
Elementary · Grades KG–5 · 0.7 mi
H
Sherwod High SchoolB-
High · Grades 9–12 · 3.6 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20832These 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.48
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.35

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.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
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.24,644
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,442 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$162,184
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$179,554
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.44 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

3909 Mount Olney Ln 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.

  • Has a bigger lot than 81% of homes in Montgomery County
  • Older than 89% of homes in Olney 20832

What homes are worth in Olney 20832

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

This home
$258K$1.4M

This home is worth more than 41% of homes in Olney 20832.

How it measures up in Olney 20832

The dot is this home. The mark in the middle is the typical home in Olney 20832.

Estimated value$633,264
CheaperTypical $676,269Pricier

Pricier than 41% of homes nearby

Price per ft²$296
CheaperTypical $292Pricier

Pricier than 54% of homes nearby

Living area2,140 ft²
SmallerTypical 2,260 ft²Bigger

Bigger than 46% of homes nearby

Lot size0.34 ac
SmallerTypical 0.23 acBigger

Bigger than 75% of homes nearby

Year built1970
OlderTypical 1986Newer

Newer than 11% of homes nearby

How 3909 Mount Olney Ln ranks against every home in each area.
MeasureThis homeOlney 20832Montgomery County
Estimated valuepricier than$633,26441% of homes50% of homes
Price per ft²pricier than$29654% of homes46% of homes
Living areabigger than2,140 ft²46% of homes55% of homes
Lot sizebigger than0.34 ac75% of homes81% of homes
Year builtnewer than197011% of homes39% of homes

About 3909 Mount Olney Ln

How much is 3909 Mount Olney Ln, Olney, MD worth?

The TopHap Estimate for 3909 Mount Olney Ln, Olney, MD is $633,264 as of Sep 24, 2026. The likely range is $616,647 to $649,881. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3909 Mount Olney Ln, Olney, MD last sell?

3909 Mount Olney Ln, Olney, MD last sold on Jan 12, 2023 for $470,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 3909 Mount Olney Ln, Olney, MD?

3909 Mount Olney Ln, Olney, MD has 2 bathrooms, 2,140 square feet of living space and a 0.34-acre lot.

When was 3909 Mount Olney Ln, Olney, MD built?

3909 Mount Olney Ln, Olney, MD was built in 1970, making it 56 years old. It is a townhouse home. The building has 1 story.

What schools serve 3909 Mount Olney Ln, Olney, MD?

3909 Mount Olney Ln, Olney, MD is assigned to Rosa M. Parks Middle School (middle), rated A; Belmont Elementary School (elementary), rated A-; Sherwod 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 3909 Mount Olney Ln, Olney, MD compare to other homes in Olney 20832?

Among the 8,619 homes in Olney 20832, it is worth more than 41% of them ($633,264 against a typical $676,269), its price per square foot is higher than 54% of them ($296 against a typical $292), it is bigger than 46% of them (2,140 ft² against a typical 2,260 ft²), its lot is bigger than 75% of them (0.34 ac against a typical 0.23 ac) and it is newer than 11% of them (1970 against a typical 1986). Measured against all of Montgomery County, it is worth more than 50% 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 3909 Mount Olney Ln, Olney, MD?

The 2025 property tax bill for 3909 Mount Olney Ln, Olney, MD was $6,578. The county assessed it at $548,400.

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