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Single Family ResidenceResidential
$1,005,602$263 / 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 90How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

1921 RIVER ROCK LN

PROSPER, TX 75078
5
Beds
5
Baths
3,828 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
2019
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
12
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1M
$903K low$1.1M high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$411,969
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$329,575
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.57%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$537,824
ASPIRE BANK · recorded Sep 1, 2021
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$55,809
CERTIFIED FNDG

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,796 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$947,083 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$199,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$747,583
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$936,701
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$947,083

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.0.19
ConstructionThe main material the home's frame and walls are built from.Wood Frame
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(3)

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 · 0.5 mi
H
Prosper High SchoolB+
High · Grades 9–12 · 2.0 mi
M
Pete Moseley Middle School
Middle · Grades 6–8 · 2.0 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

1921 River Rock Ln 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 92% of homes in Collin County
  • Costs more per square foot than 87% of homes in Collin County
  • Bigger than 87% of homes in Collin County
  • Newer than 81% 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
$376K$1.9M

This home is worth more than 75% 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$1,005,602
CheaperTypical $793,731Pricier

Pricier than 75% of homes nearby

Price per ft²$263
CheaperTypical $240Pricier

Pricier than 68% of homes nearby

Living area3,828 ft²
SmallerTypical 3,420 ft²Bigger

Bigger than 68% of homes nearby

Lot size0.19 ac
SmallerTypical 0.21 acBigger

Bigger than 37% of homes nearby

Year built2019
OlderTypical 2018Newer

Newer than 61% of homes nearby

How 1921 River Rock Ln ranks against every home in each area.
MeasureThis homeProsper 75078Collin County
Estimated valuepricier than$1,005,60275% of homes92% of homes
Price per ft²pricier than$26368% of homes87% of homes
Living areabigger than3,828 ft²68% of homes87% of homes
Lot sizebigger than0.19 ac37% of homes49% of homes
Year builtnewer than201961% of homes81% of homes

About 1921 River Rock Ln

How much is 1921 River Rock Ln, Prosper, TX worth?

The TopHap Estimate for 1921 River Rock Ln, Prosper, TX is $1,005,602 as of Jul 14, 2026. The likely range is $902,875 to $1,108,329. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1921 River Rock Ln, Prosper, TX last sell?

1921 River Rock Ln, Prosper, TX last sold on Sep 24, 2019, according to the county's recorded deed.

How big is 1921 River Rock Ln, Prosper, TX?

1921 River Rock Ln, Prosper, TX has 5 bedrooms, 5 bathrooms, 3,828 square feet of living space and a 0.19-acre lot.

When was 1921 River Rock Ln, Prosper, TX built?

1921 River Rock Ln, Prosper, TX was built in 2019, making it 7 years old. The building has 2 stories.

What schools serve 1921 River Rock Ln, Prosper, TX?

1921 River Rock Ln, Prosper, TX is assigned to Hall Elementary School (elementary), rated A; Prosper High School (high), rated B+; Pete Moseley Middle School (middle). All sit in Prosper Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1921 River Rock Ln, Prosper, TX compare to other homes in Prosper 75078?

Among the 18,714 homes in Prosper 75078, it is worth more than 75% of them ($1,005,602 against a typical $793,731), its price per square foot is higher than 68% of them ($263 against a typical $240), it is bigger than 68% of them (3,828 ft² against a typical 3,420 ft²), its lot is bigger than 37% of them (0.19 ac against a typical 0.21 ac) and it is newer than 61% of them (2019 against a typical 2018). Measured against all of Collin County, it is worth more than 92% 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 1921 River Rock Ln, Prosper, TX?

The 2024 property tax bill for 1921 River Rock Ln, Prosper, TX was $13,796. The county assessed it at $947,083.

Closest homes

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Assigned schools

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