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Single Family ResidenceResidential
$1,258,169$245 / 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 Sep 24, 2026
Last sold for $866,700 on Nov 25, 2019

9100 RATTLESNAKE TRL

AUSTIN, TX 78717
5
Beds
4.5
Baths
5,140 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.
2019
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.3M
$1.2M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$866,700 · Nov 25, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$21,350 (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.$1,331,760 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,210,691
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,380,168

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyWILLIAMSON
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
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.Patio · 180 ft²Porch · 230 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
Pearson Ranch Middle SchoolA+
Middle · Grades 6–8 · 0.4 mi
E
England Elementary SchoolA+
Elementary · Grades PK–5 · 0.6 mi
H
McNeil High SchoolA-
High · Grades 9–12 · 3.7 mi

District: Round Rock Independent School District

Neighborhood · ZIP 78717These 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.48
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.15

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.39%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.45,672
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,880 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,403
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$153,215
Average tempThe average temperature here across a full year.67°F
Annual precipHow much rain and melted snow falls here in a typical year.35 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.60%

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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

9100 Rattlesnake Trl 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 Austin 78717
  • Costs more per square foot than 87% of homes in Williamson County
  • Among the largest homes in Austin 78717
  • Newer than 97% of homes in Austin 78717

What homes are worth in Austin 78717

Each bar is how many homes fall in that price range. The marker is this home.

This home
$306K$1.2M

This home is worth more than almost all homes in Austin 78717.

How it measures up in Austin 78717

The dot is this home. The mark in the middle is the typical home in Austin 78717.

Estimated value$1,258,169
CheaperTypical $577,719Pricier

Pricier than almost all homes nearby

Price per ft²$245
CheaperTypical $231Pricier

Pricier than 70% of homes nearby

Living area5,140 ft²
SmallerTypical 2,549 ft²Bigger

Bigger than almost all homes nearby

Year built2019
OlderTypical 2005Newer

Newer than 97% of homes nearby

How 9100 Rattlesnake Trl ranks against every home in each area.
MeasureThis homeAustin 78717Williamson County
Estimated valuepricier than$1,258,169almost all homesalmost all homes
Price per ft²pricier than$24570% of homes87% of homes
Living areabigger than5,140 ft²almost all homesalmost all homes
Year builtnewer than201997% of homes79% of homes

About 9100 Rattlesnake Trl

How much is 9100 Rattlesnake Trl, Austin, TX worth?

The TopHap Estimate for 9100 Rattlesnake Trl, Austin, TX is $1,258,169 as of Sep 24, 2026. The likely range is $1,182,913 to $1,333,425. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9100 Rattlesnake Trl, Austin, TX last sell?

9100 Rattlesnake Trl, Austin, TX last sold on Nov 25, 2019 for $866,700, according to the county's recorded deed.

How big is 9100 Rattlesnake Trl, Austin, TX?

9100 Rattlesnake Trl, Austin, TX has 5 bedrooms, 4.5 bathrooms and 5,140 square feet of living space.

When was 9100 Rattlesnake Trl, Austin, TX built?

9100 Rattlesnake Trl, Austin, TX was built in 2019, making it 7 years old. The building has 2 stories.

What schools serve 9100 Rattlesnake Trl, Austin, TX?

9100 Rattlesnake Trl, Austin, TX is assigned to Pearson Ranch Middle School (middle), rated A+; England Elementary School (elementary), rated A+; McNeil High School (high), rated A-. All sit in Round Rock Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9100 Rattlesnake Trl, Austin, TX compare to other homes in Austin 78717?

Among the 9,399 homes in Austin 78717, it is worth more than almost all of them ($1,258,169 against a typical $577,719), its price per square foot is higher than 70% of them ($245 against a typical $231), it is bigger than almost all of them (5,140 ft² against a typical 2,549 ft²) and it is newer than 97% of them (2019 against a typical 2005). Measured against all of Williamson 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 9100 Rattlesnake Trl, Austin, TX?

The 2025 property tax bill for 9100 Rattlesnake Trl, Austin, TX was $21,350. The county assessed it at $1,331,760.

More homes on Rattlesnake Trl

Closest homes

More homes in Austin 78717

Assigned schools

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