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Single Family ResidenceResidential
$547,171$206 / 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 94How 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

840 SIBYL LN

PROSPER, TX 75078
4
Beds
3
Baths
2,658 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.
2003
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
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

$547K
$513K low$581K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,565 (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.$522,228 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$165,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$357,228
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$566,365
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$522,228

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.57
45
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
21
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.19 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
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.Frame (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 · 16 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.

M
Reynolds Middle SchoolA
Middle · Grades 6–8 · 0.3 mi
H
Prosper High SchoolB+
High · Grades 9–12 · 0.8 mi
E
Rucker Elementary SchoolB
Elementary · Grades KG–5 · 1.1 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%

Owner Tools

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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

840 Sibyl 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 less than 84% of homes in Prosper 75078
  • Costs less per square foot than 77% of homes in Prosper 75078
  • Smaller than 79% of homes in Prosper 75078
  • Older than 94% 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
$361K$1.9M

This home is worth more than 16% 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$547,171
CheaperTypical $776,733Pricier

Pricier than 16% of homes nearby

Price per ft²$206
CheaperTypical $235Pricier

Pricier than 23% of homes nearby

Living area2,658 ft²
SmallerTypical 3,425 ft²Bigger

Bigger than 21% of homes nearby

Year built2003
OlderTypical 2018Newer

Newer than 6% of homes nearby

How 840 Sibyl Ln ranks against every home in each area.
MeasureThis homeProsper 75078Collin County
Estimated valuepricier than$547,17116% of homes57% of homes
Price per ft²pricier than$20623% of homes45% of homes
Living areabigger than2,658 ft²21% of homes58% of homes
Year builtnewer than20036% of homes49% of homes

About 840 Sibyl Ln

How much is 840 Sibyl Ln, Prosper, TX worth?

The TopHap Estimate for 840 Sibyl Ln, Prosper, TX is $547,171 as of Aug 30, 2026. The likely range is $513,445 to $580,897. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 840 Sibyl Ln, Prosper, TX last sell?

840 Sibyl Ln, Prosper, TX last sold on Apr 30, 2004, according to the county's recorded deed.

How big is 840 Sibyl Ln, Prosper, TX?

840 Sibyl Ln, Prosper, TX has 4 bedrooms, 3 bathrooms and 2,658 square feet of living space.

When was 840 Sibyl Ln, Prosper, TX built?

840 Sibyl Ln, Prosper, TX was built in 2003, making it 23 years old. The building has 2 stories.

What schools serve 840 Sibyl Ln, Prosper, TX?

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

How does 840 Sibyl Ln, Prosper, TX compare to other homes in Prosper 75078?

Among the 18,882 homes in Prosper 75078, it is worth more than 16% of them ($547,171 against a typical $776,733), its price per square foot is higher than 23% of them ($206 against a typical $235), it is bigger than 21% of them (2,658 ft² against a typical 3,425 ft²) and it is newer than 6% of them (2003 against a typical 2018). Measured against all of Collin County, it is worth more than 57% 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 840 Sibyl Ln, Prosper, TX?

The 2024 property tax bill for 840 Sibyl Ln, Prosper, TX was $6,565. The county assessed it at $522,228.

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