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Single Family ResidenceResidential
$1,245,795$297 / 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 94How 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 $1,115,000 on Apr 20, 2007

17520 SIR GALAHAD WAY

ASHTON, MD 20861
5.5
Baths
4,192 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.
5.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1991
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

$1.2M
$1.2M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,115,000 · Apr 20, 2007

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,233 (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.$1,016,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$318,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$697,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$958,667
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,016,000

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.Bi-Level
CountyMONTGOMERY
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.Wood Shingle
HeatingThe type of heating system in the home.Heat Pump
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.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 · 504 ft²

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.

H
Sherwod High SchoolB-
High · Grades 9–12 · 1.1 mi
E
Sherwood Elementary SchoolA-
Elementary · Grades KG–5 · 1.8 mi
M
William H. Farquhar Middle SchoolB
Middle · Grades 6–8 · 2.5 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20861These 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.76
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.3%
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.2,094
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.545 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$177,998
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$201,963
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

17520 Sir Galahad Way 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 87% of homes in Montgomery County
  • Costs more per square foot than 76% of homes in Ashton 20861
  • Bigger than 90% of homes in Montgomery County
  • Among the largest lots in Montgomery County
  • Newer than 75% of homes in Montgomery County

What homes are worth in Ashton 20861

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

This home
$428K$1.6M

This home is worth more than 78% of homes in Ashton 20861.

How it measures up in Ashton 20861

The dot is this home. The mark in the middle is the typical home in Ashton 20861.

Estimated value$1,245,795
CheaperTypical $946,303Pricier

Pricier than 78% of homes nearby

Price per ft²$297
CheaperTypical $241Pricier

Pricier than 76% of homes nearby

Living area4,192 ft²
SmallerTypical 3,960 ft²Bigger

Bigger than 52% of homes nearby

Lot size5.12 ac
SmallerTypical 0.77 acBigger

Bigger than 95% of homes nearby

Year built1991
OlderTypical 1992Newer

Newer than 50% of homes nearby

How 17520 Sir Galahad Way ranks against every home in each area.
MeasureThis homeAshton 20861Montgomery County
Estimated valuepricier than$1,245,79578% of homes87% of homes
Price per ft²pricier than$29776% of homes47% of homes
Living areabigger than4,192 ft²52% of homes90% of homes
Lot sizebigger than5.12 ac95% of homesalmost all homes
Year builtnewer than199150% of homes75% of homes

About 17520 Sir Galahad Way

How much is 17520 Sir Galahad Way, Ashton, MD worth?

The TopHap Estimate for 17520 Sir Galahad Way, Ashton, MD is $1,245,795 as of Aug 30, 2026. The likely range is $1,174,865 to $1,316,725. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 17520 Sir Galahad Way, Ashton, MD last sell?

17520 Sir Galahad Way, Ashton, MD last sold on Apr 20, 2007 for $1,115,000, according to the county's recorded deed.

How big is 17520 Sir Galahad Way, Ashton, MD?

17520 Sir Galahad Way, Ashton, MD has 5.5 bathrooms and 4,192 square feet of living space.

When was 17520 Sir Galahad Way, Ashton, MD built?

17520 Sir Galahad Way, Ashton, MD was built in 1991, making it 35 years old. It is a bi-level home. The building has 2 stories.

What schools serve 17520 Sir Galahad Way, Ashton, MD?

17520 Sir Galahad Way, Ashton, MD is assigned to Sherwod High School (high), rated B-; Sherwood Elementary School (elementary), rated A-; William H. Farquhar 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 17520 Sir Galahad Way, Ashton, MD compare to other homes in Ashton 20861?

Among the 1,029 homes in Ashton 20861, it is worth more than 78% of them ($1,245,795 against a typical $946,303), its price per square foot is higher than 76% of them ($297 against a typical $241), it is bigger than 52% of them (4,192 ft² against a typical 3,960 ft²), its lot is bigger than 95% of them (5.12 ac against a typical 0.77 ac) and it is newer than 50% of them (1991 against a typical 1992). Measured against all of Montgomery County, it is worth more than 87% 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 17520 Sir Galahad Way, Ashton, MD?

The 2025 property tax bill for 17520 Sir Galahad Way, Ashton, MD was $11,233. The county assessed it at $1,016,000.

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