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Single Family ResidenceResidential
$1,329,464$260 / 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 92How 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

1321 ARMSTRONG LN

PROSPER, TX 75078
5
Beds
6
Baths
5,109 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.
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
2021
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$1.3M
$1.2M low$1.4M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,277 (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.$1,186,664 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$291,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$895,164
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,095,139
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,186,664

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.59
35
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
42
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
93
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
52
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
74
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

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.0.26
HeatingThe type of heating system in the home.None
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Jana Thomson Elementary School
Elementary · Grades KG–5 · 0.4 mi
H
Prosper High SchoolB+
High · Grades 9–12 · 1.8 mi
M
Pete Moseley Middle School
Middle · Grades 6–8 · 2.1 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

1321 Armstrong 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 97% of homes in Collin County
  • Costs more per square foot than 87% of homes in Collin County
  • Bigger than 98% of homes in Collin County
  • Has a bigger lot than 73% of homes in Collin County
  • Newer than 87% 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
$357K$1.8M

This home is worth more than 92% 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$1,329,464
CheaperTypical $775,623Pricier

Pricier than 92% of homes nearby

Price per ft²$260
CheaperTypical $235Pricier

Pricier than 72% of homes nearby

Living area5,109 ft²
SmallerTypical 3,424 ft²Bigger

Bigger than 97% of homes nearby

Lot size0.26 ac
SmallerTypical 0.21 acBigger

Bigger than 68% of homes nearby

Year built2021
OlderTypical 2018Newer

Newer than 77% of homes nearby

How 1321 Armstrong Ln ranks against every home in each area.
MeasureThis homeProsper 75078Collin County
Estimated valuepricier than$1,329,46492% of homes97% of homes
Price per ft²pricier than$26072% of homes87% of homes
Living areabigger than5,109 ft²97% of homes98% of homes
Lot sizebigger than0.26 ac68% of homes73% of homes
Year builtnewer than202177% of homes87% of homes

About 1321 Armstrong Ln

How much is 1321 Armstrong Ln, Prosper, TX worth?

The TopHap Estimate for 1321 Armstrong Ln, Prosper, TX is $1,329,464 as of Aug 30, 2026. The likely range is $1,217,060 to $1,441,868. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1321 Armstrong Ln, Prosper, TX last sell?

1321 Armstrong Ln, Prosper, TX last sold on May 4, 2022, according to the county's recorded deed.

How big is 1321 Armstrong Ln, Prosper, TX?

1321 Armstrong Ln, Prosper, TX has 5 bedrooms, 6 bathrooms, 5,109 square feet of living space and a 0.26-acre lot.

When was 1321 Armstrong Ln, Prosper, TX built?

1321 Armstrong Ln, Prosper, TX was built in 2021, making it 5 years old. The building has 2 stories.

What schools serve 1321 Armstrong Ln, Prosper, TX?

1321 Armstrong Ln, Prosper, TX is assigned to Jana Thomson Elementary School (elementary); 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 1321 Armstrong Ln, Prosper, TX compare to other homes in Prosper 75078?

Among the 18,728 homes in Prosper 75078, it is worth more than 92% of them ($1,329,464 against a typical $775,623), its price per square foot is higher than 72% of them ($260 against a typical $235), it is bigger than 97% of them (5,109 ft² against a typical 3,424 ft²), its lot is bigger than 68% of them (0.26 ac against a typical 0.21 ac) and it is newer than 77% of them (2021 against a typical 2018). Measured against all of Collin County, it is worth more than 97% 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 1321 Armstrong Ln, Prosper, TX?

The 2024 property tax bill for 1321 Armstrong Ln, Prosper, TX was $16,277. The county assessed it at $1,186,664.

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