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Single Family ResidenceResidential
$1,971,140$231 / 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 Sep 24, 2026
Last sold for $1,650,000 on Aug 18, 2017

10509 BOSWELL LN

POTOMAC, MD 20854
5.5
Baths
8,528 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.
0.4 ac
Lot SizeThe size of the land the home sits on, from county records.
2008
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2M
$1.9M low$2.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,650,000 · Aug 18, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$18,963 (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.$1,625,400 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$460,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,165,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,601,467
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,625,400

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.0.40
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, Built-in
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Waterfront
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 190 ft²Patio · 2,742 ft²Porch · 77 ft²Boat access

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.

E
Wayside Elementary SchoolA+
Elementary · Grades KG–5 · 1.6 mi
M
Herbert Hoover Middle SchoolA+
Middle · Grades 6–8 · 2.7 mi
H
Winston Churchill High SchoolA-
High · Grades 9–12 · 3.0 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20854These 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.43
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
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.97%
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.2.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.51,685
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,423 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$211,237
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$271,649
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.42 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

10509 Boswell 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.

  • Worth more than 96% of homes in Montgomery County
  • Costs less per square foot than 98% of homes in Potomac 20854
  • Among the largest homes in Montgomery County
  • Has a bigger lot than 85% of homes in Montgomery County
  • Newer than 97% of homes in Potomac 20854

What homes are worth in Potomac 20854

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

This home
$608K$3.5M

This home is worth more than 86% of homes in Potomac 20854.

How it measures up in Potomac 20854

The dot is this home. The mark in the middle is the typical home in Potomac 20854.

Estimated value$1,971,140
CheaperTypical $1,259,329Pricier

Pricier than 86% of homes nearby

Price per ft²$231
CheaperTypical $367Pricier

Pricier than 2% of homes nearby

Living area8,528 ft²
SmallerTypical 3,369 ft²Bigger

Bigger than 93% of homes nearby

Lot size0.4 ac
SmallerTypical 0.3 acBigger

Bigger than 64% of homes nearby

Year built2008
OlderTypical 1977Newer

Newer than 97% of homes nearby

How 10509 Boswell Ln ranks against every home in each area.
MeasureThis homePotomac 20854Montgomery County
Estimated valuepricier than$1,971,14086% of homes96% of homes
Price per ft²pricier than$2312% of homes16% of homes
Living areabigger than8,528 ft²93% of homesalmost all homes
Lot sizebigger than0.4 ac64% of homes85% of homes
Year builtnewer than200897% of homes92% of homes

About 10509 Boswell Ln

How much is 10509 Boswell Ln, Potomac, MD worth?

The TopHap Estimate for 10509 Boswell Ln, Potomac, MD is $1,971,140 as of Sep 24, 2026. The likely range is $1,888,421 to $2,053,859. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10509 Boswell Ln, Potomac, MD last sell?

10509 Boswell Ln, Potomac, MD last sold on Aug 18, 2017 for $1,650,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 10509 Boswell Ln, Potomac, MD?

10509 Boswell Ln, Potomac, MD has 5.5 bathrooms, 8,528 square feet of living space and a 0.40-acre lot.

When was 10509 Boswell Ln, Potomac, MD built?

10509 Boswell Ln, Potomac, MD was built in 2008, making it 18 years old. It is a bi-level home. The building has 2 stories.

What schools serve 10509 Boswell Ln, Potomac, MD?

10509 Boswell Ln, Potomac, MD is assigned to Wayside Elementary School (elementary), rated A+; Herbert Hoover Middle School (middle), rated A+; Winston Churchill High School (high), rated A-. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10509 Boswell Ln, Potomac, MD compare to other homes in Potomac 20854?

Among the 17,261 homes in Potomac 20854, it is worth more than 86% of them ($1,971,140 against a typical $1,259,329), its price per square foot is higher than 2% of them ($231 against a typical $367), it is bigger than 93% of them (8,528 ft² against a typical 3,369 ft²), its lot is bigger than 64% of them (0.4 ac against a typical 0.3 ac) and it is newer than 97% of them (2008 against a typical 1977). Measured against all of Montgomery County, it is worth more than 96% 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 10509 Boswell Ln, Potomac, MD?

The 2025 property tax bill for 10509 Boswell Ln, Potomac, MD was $18,963. The county assessed it at $1,625,400.

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