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Single Family ResidenceResidential
$585,402$342 / 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 $399,000 on Aug 19, 2021

18B GRINDSTONE DR

PROSPER, TX 75078
3
Beds
2
Baths
1,714 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.
1.04 ac
Lot SizeThe size of the land the home sits on, from county records.
1996
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
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

$585K
$563K low$607K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$399,000 · Aug 19, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,819 (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.$569,800 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$528,494
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$573,000

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.2005
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Mat/Raft Foundation (Slab)
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.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 148 ft²

Transaction History(1)

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
Cynthia A. Cockrell Elementary SchoolA+
Elementary · Grades KG–5 · 0.4 mi
H
Walnut Grove High School
High · Grades 9–12 · 1.5 mi
M
Rogers Middle SchoolA+
Middle · Grades 6–8 · 2.5 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

18b 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 less than 77% of homes in Prosper 75078
  • Costs more per square foot than 97% of homes in Collin County
  • Smaller than 97% of homes in Prosper 75078
  • Has a bigger lot than 95% of homes in Prosper 75078
  • Older than 97% 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
$366K$1.8M

This home is worth more than 23% 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$585,402
CheaperTypical $748,626Pricier

Pricier than 23% of homes nearby

Price per ft²$342
CheaperTypical $224Pricier

Pricier than 96% of homes nearby

Living area1,714 ft²
SmallerTypical 3,424 ft²Bigger

Bigger than 3% of homes nearby

Lot size1.04 ac
SmallerTypical 0.23 acBigger

Bigger than 95% of homes nearby

Year built1996
OlderTypical 2018Newer

Newer than 3% of homes nearby

How 18b Grindstone Dr ranks against every home in each area.
MeasureThis homeProsper 75078Collin County
Estimated valuepricier than$585,40223% of homes64% of homes
Price per ft²pricier than$34296% of homes97% of homes
Living areabigger than1,714 ft²3% of homes17% of homes
Lot sizebigger than1.04 ac95% of homes92% of homes
Year builtnewer than19963% of homes31% of homes

About 18b Grindstone Dr

How much is 18b Grindstone Dr, Prosper, TX worth?

The TopHap Estimate for 18b Grindstone Dr, Prosper, TX is $585,402 as of Sep 24, 2026. The likely range is $563,339 to $607,465. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18b Grindstone Dr, Prosper, TX last sell?

18b Grindstone Dr, Prosper, TX last sold on Aug 19, 2021 for $399,000, according to the county's recorded deed.

How big is 18b Grindstone Dr, Prosper, TX?

18b Grindstone Dr, Prosper, TX has 3 bedrooms, 2 bathrooms and 1,714 square feet of living space.

When was 18b Grindstone Dr, Prosper, TX built?

18b Grindstone Dr, Prosper, TX was built in 1996, making it 30 years old. The building has 1 story.

What schools serve 18b Grindstone Dr, Prosper, TX?

18b Grindstone Dr, Prosper, TX is assigned to Cynthia A. Cockrell Elementary School (elementary), rated A+; Walnut Grove High School (high); 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 18b Grindstone Dr, Prosper, TX compare to other homes in Prosper 75078?

Among the 19,916 homes in Prosper 75078, it is worth more than 23% of them ($585,402 against a typical $748,626), its price per square foot is higher than 96% of them ($342 against a typical $224), it is bigger than 3% of them (1,714 ft² against a typical 3,424 ft²), its lot is bigger than 95% of them (1.04 ac against a typical 0.23 ac) and it is newer than 3% of them (1996 against a typical 2018). Measured against all of Collin County, it is worth more than 64% 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 18b Grindstone Dr, Prosper, TX?

The 2025 property tax bill for 18b Grindstone Dr, Prosper, TX was $7,819. The county assessed it at $569,800.

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