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Single Family ResidenceResidential
$3,171,956$601 / 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 95How 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 $2,010,000 on Aug 21, 2018

4001 THORNAPPLE ST

CHEVY CHASE, MD 20815
4.5
Baths
5,275 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.
0.25 ac
Lot SizeThe size of the land the home sits on, from county records.
1928
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

$3.2M
$3M low$3.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$2,010,000 · Aug 21, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$29,460 (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.$2,513,300 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,015,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,497,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2,773,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,513,300

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.0.25
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.Radiant
CoolingThe type of cooling or air conditioning in the home.Yes
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.Spa/Hot Tub (Only)
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 600 ft²

Transaction History(5)

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.

H
Bethesda - Chevy Chase High SchoolA-
High · Grades 9–12 · 0.6 mi
E
Rosemary Hills Elementary School
Elementary · Grades PK–2 · 2.3 mi
M
Silver Creek Middle SchoolB+
Middle · Grades 6–8 · 2.3 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20815These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.94
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.32

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
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.32,509
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,920 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$188,904
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$263,298
Average tempThe average temperature here across a full year.55°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

4001 Thornapple St 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.

  • Among the most valuable homes in Montgomery County
  • Costs more per square foot than 96% of homes in Montgomery County
  • Bigger than 95% of homes in Montgomery County
  • Has a bigger lot than 85% of homes in Chevy Chase
  • Older than 98% of homes in Montgomery County

What homes are worth in Chevy Chase 20815

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

This home
$192K$3.9M

This home is worth more than 94% of homes in Chevy Chase 20815.

How it measures up in Chevy Chase 20815

The dot is this home. The mark in the middle is the typical home in Chevy Chase 20815.

Estimated value$3,171,956
CheaperTypical $1,466,822Pricier

Pricier than 94% of homes nearby

Price per ft²$601
CheaperTypical $557Pricier

Pricier than 59% of homes nearby

Living area5,275 ft²
SmallerTypical 2,384 ft²Bigger

Bigger than 93% of homes nearby

Lot size0.25 ac
SmallerTypical 0.16 acBigger

Bigger than 80% of homes nearby

Year built1928
OlderTypical 1955Newer

Newer than 13% of homes nearby

How 4001 Thornapple St ranks against every home in each area.
MeasureThis homeChevy ChaseChevy Chase 20815Montgomery County
Estimated valuepricier than$3,171,95693% of homes94% of homesalmost all homes
Price per ft²pricier than$60139% of homes59% of homes96% of homes
Living areabigger than5,275 ft²91% of homes93% of homes95% of homes
Lot sizebigger than0.25 ac85% of homes80% of homes71% of homes
Year builtnewer than192842% of homes13% of homes2% of homes

About 4001 Thornapple St

How much is 4001 Thornapple St, Chevy Chase, MD worth?

The TopHap Estimate for 4001 Thornapple St, Chevy Chase, MD is $3,171,956 as of Sep 24, 2026. The likely range is $2,998,447 to $3,345,465. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4001 Thornapple St, Chevy Chase, MD last sell?

4001 Thornapple St, Chevy Chase, MD last sold on Aug 21, 2018 for $2,010,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4001 Thornapple St, Chevy Chase, MD?

4001 Thornapple St, Chevy Chase, MD has 4.5 bathrooms, 5,275 square feet of living space and a 0.25-acre lot.

When was 4001 Thornapple St, Chevy Chase, MD built?

4001 Thornapple St, Chevy Chase, MD was built in 1928, making it 98 years old. It is a bi-level home. The building has 2 stories.

What schools serve 4001 Thornapple St, Chevy Chase, MD?

4001 Thornapple St, Chevy Chase, MD is assigned to Bethesda - Chevy Chase High School (high), rated A-; Rosemary Hills Elementary School (elementary); Silver Creek Middle School (middle), rated B+. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4001 Thornapple St, Chevy Chase, MD compare to other homes in Chevy Chase 20815?

Among the 10,593 homes in Chevy Chase 20815, it is worth more than 94% of them ($3,171,956 against a typical $1,466,822), its price per square foot is higher than 59% of them ($601 against a typical $557), it is bigger than 93% of them (5,275 ft² against a typical 2,384 ft²), its lot is bigger than 80% of them (0.25 ac against a typical 0.16 ac) and it is newer than 13% of them (1928 against a typical 1955). Measured against all of Montgomery County, it is worth more than almost all 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 4001 Thornapple St, Chevy Chase, MD?

The 2025 property tax bill for 4001 Thornapple St, Chevy Chase, MD was $29,460. The county assessed it at $2,513,300.

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