Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,648,932$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 93How 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 $837,900 on Jul 8, 2024

821 HALLMARK

PROSPER, TX 75078
4
Beds
4.5
Baths
4,803 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.
0.51 ac
Lot SizeThe size of the land the home sits on, from county records.
2018
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.6M
$1.5M low$1.8M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$837,900 · Jul 8, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$22,562 (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.$1,320,337 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$350,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$970,337
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,431,034
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,320,337

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyCOLLIN
Lot (acres)The size of the land the home sits on, from county records.0.51
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
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.Yes

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
Hall Elementary SchoolA
Elementary · Grades KG–5 · 0.2 mi
M
Pete Moseley Middle School
Middle · Grades 6–8 · 1.9 mi
H
Prosper High SchoolB+
High · Grades 9–12 · 2.3 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%

Owner Tools

Do you own this home?
Claim this home

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

821 Hallmark 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 Collin County
  • Costs more per square foot than 97% of homes in Collin County
  • Bigger than 97% of homes in Collin County
  • Has a bigger lot than 92% of homes in Prosper 75078
  • Newer than 78% of homes in Collin County

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
$381K$2M

This home is worth more than 96% 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$1,648,932
CheaperTypical $779,283Pricier

Pricier than 96% of homes nearby

Price per ft²$343
CheaperTypical $235Pricier

Pricier than 94% of homes nearby

Living area4,803 ft²
SmallerTypical 3,426 ft²Bigger

Bigger than 94% of homes nearby

Lot size0.51 ac
SmallerTypical 0.21 acBigger

Bigger than 92% of homes nearby

Year built2018
OlderTypical 2018Newer

Newer than 54% of homes nearby

How 821 Hallmark ranks against every home in each area.
MeasureThis homeProsper 75078Collin County
Estimated valuepricier than$1,648,93296% of homesalmost all homes
Price per ft²pricier than$34394% of homes97% of homes
Living areabigger than4,803 ft²94% of homes97% of homes
Lot sizebigger than0.51 ac92% of homes83% of homes
Year builtnewer than201854% of homes78% of homes

About 821 Hallmark

How much is 821 Hallmark, Prosper, TX worth?

The TopHap Estimate for 821 Hallmark, Prosper, TX is $1,648,932 as of Aug 30, 2026. The likely range is $1,540,143 to $1,757,721. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 821 Hallmark, Prosper, TX last sell?

821 Hallmark, Prosper, TX last sold on Jul 8, 2024 for $837,900, according to the county's recorded deed.

How big is 821 Hallmark, Prosper, TX?

821 Hallmark, Prosper, TX has 4 bedrooms, 4.5 bathrooms, 4,803 square feet of living space and a 0.51-acre lot.

When was 821 Hallmark, Prosper, TX built?

821 Hallmark, Prosper, TX was built in 2018, making it 8 years old. The building has 2 stories.

What schools serve 821 Hallmark, Prosper, TX?

821 Hallmark, Prosper, TX is assigned to Hall Elementary School (elementary), rated A; Pete Moseley Middle School (middle); Prosper High School (high), rated B+. All sit in Prosper Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 821 Hallmark, Prosper, TX compare to other homes in Prosper 75078?

Among the 18,883 homes in Prosper 75078, it is worth more than 96% of them ($1,648,932 against a typical $779,283), its price per square foot is higher than 94% of them ($343 against a typical $235), it is bigger than 94% of them (4,803 ft² against a typical 3,426 ft²), its lot is bigger than 92% of them (0.51 ac against a typical 0.21 ac) and it is newer than 54% of them (2018 against a typical 2018). Measured against all of Collin 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 821 Hallmark, Prosper, TX?

The 2025 property tax bill for 821 Hallmark, Prosper, TX was $22,562. The county assessed it at $1,320,337.

More homes on Hallmark

Closest homes

More homes in Prosper 75078

Assigned schools

Explore the area

See this home in context

Open 821 Hallmark on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map