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Single Family ResidenceResidential
$786,549$343 / 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 88How 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 $256,300 on Aug 9, 2017

20B GRINDSTONE DR

PROSPER, TX 75078
3
Beds
2
Baths
2,295 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.
1.07 ac
Lot SizeThe size of the land the home sits on, from county records.
1998
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$787K
$695K low$878K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$256,300 · Aug 9, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,917 (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.$577,750 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$214,420
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$363,330
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$554,639
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$577,750

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyCOLLIN
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2000
Lot (acres)The size of the land the home sits on, from county records.1.07
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Central
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.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 205 ft²

Transaction History(6)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Cynthia A. Cockrell Elementary SchoolA
Elementary · Grades KG–5 · 0.4 mi
H
Walnut Grove High SchoolB+
High · Grades 9–12 · 1.5 mi
M
Rogers Middle SchoolA+
Middle · Grades 6–8 · 2.6 mi

District: Prosper Independent School District

Neighborhood · ZIP 75078These 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.49
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.29

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.41%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.49,045
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,435 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$166,233
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$200,017
Average tempThe average temperature here across a full year.64°F
Annual precipHow much rain and melted snow falls here in a typical year.40 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.62%

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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

20b Grindstone Dr 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 83% of homes in Collin County
  • Costs more per square foot than 97% of homes in Collin County
  • Smaller than 87% of homes in Prosper 75078
  • Has a bigger lot than 96% of homes in Prosper 75078
  • Older than 96% of homes in Prosper 75078

What homes are worth in Prosper 75078

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

This home
$357K$1.8M

This home is worth more than 52% of homes in Prosper 75078.

How it measures up in Prosper 75078

The dot is this home. The mark in the middle is the typical home in Prosper 75078.

Estimated value$786,549
CheaperTypical $775,623Pricier

Pricier than 52% of homes nearby

Price per ft²$343
CheaperTypical $235Pricier

Pricier than 94% of homes nearby

Living area2,295 ft²
SmallerTypical 3,424 ft²Bigger

Bigger than 13% of homes nearby

Lot size1.07 ac
SmallerTypical 0.21 acBigger

Bigger than 96% of homes nearby

Year built1998
OlderTypical 2018Newer

Newer than 4% of homes nearby

How 20b Grindstone Dr ranks against every home in each area.
MeasureThis homeProsper 75078Collin County
Estimated valuepricier than$786,54952% of homes83% of homes
Price per ft²pricier than$34394% of homes97% of homes
Living areabigger than2,295 ft²13% of homes44% of homes
Lot sizebigger than1.07 ac96% of homes89% of homes
Year builtnewer than19984% of homes36% of homes

About 20b Grindstone Dr

How much is 20b Grindstone Dr, Prosper, TX worth?

The TopHap Estimate for 20b Grindstone Dr, Prosper, TX is $786,549 as of Aug 30, 2026. The likely range is $694,951 to $878,147. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20b Grindstone Dr, Prosper, TX last sell?

20b Grindstone Dr, Prosper, TX last sold on Aug 9, 2017 for $256,300, according to the county's recorded deed.

How big is 20b Grindstone Dr, Prosper, TX?

20b Grindstone Dr, Prosper, TX has 3 bedrooms, 2 bathrooms, 2,295 square feet of living space and a 1.07-acre lot.

When was 20b Grindstone Dr, Prosper, TX built?

20b Grindstone Dr, Prosper, TX was built in 1998, making it 28 years old. The building has 1 story.

What schools serve 20b Grindstone Dr, Prosper, TX?

20b Grindstone Dr, Prosper, TX is assigned to Cynthia A. Cockrell Elementary School (elementary), rated A; Walnut Grove High School (high), rated B+; Rogers Middle School (middle), rated A+. All sit in Prosper Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20b Grindstone Dr, Prosper, TX compare to other homes in Prosper 75078?

Among the 18,728 homes in Prosper 75078, it is worth more than 52% of them ($786,549 against a typical $775,623), its price per square foot is higher than 94% of them ($343 against a typical $235), it is bigger than 13% of them (2,295 ft² against a typical 3,424 ft²), its lot is bigger than 96% of them (1.07 ac against a typical 0.21 ac) and it is newer than 4% of them (1998 against a typical 2018). Measured against all of Collin County, it is worth more than 83% 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 20b Grindstone Dr, Prosper, TX?

The 2025 property tax bill for 20b Grindstone Dr, Prosper, TX was $8,917. The county assessed it at $577,750.

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