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Single Family ResidenceResidential
$302,961$242 / 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 91How 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 $101,700 on Jun 19, 2002

8421 ALUM ROCK DR

AUSTIN, TX 78747
2
Baths
1,250 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
2002
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$303K
$276K low$330K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$101,700 · Jun 19, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$913 (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.$262,655 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$61,071
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$201,584
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$310,116
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$262,655

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyTRAVIS
Lot (acres)The size of the land the home sits on, from county records.0.13
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
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
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 · 115 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.

E
Palm Elementary SchoolC+
Elementary · Grades EE–5 · 0.8 mi
H
Akins High SchoolC
High · Grades 9–12 · 3.7 mi
M
Paredes Middle SchoolD
Middle · Grades 6–8 · 4.4 mi

District: Austin Independent School District

Neighborhood · ZIP 78747These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.80
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.18

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.9%
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.23,683
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.996 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,831
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$109,702
Average tempThe average temperature here across a full year.68°F
Annual precipHow much rain and melted snow falls here in a typical year.36 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

8421 Alum Rock Dr 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 85% of homes in Austin 78747
  • Costs more per square foot than 92% of homes in Austin 78747
  • Smaller than 90% of homes in Austin 78747
  • Has a smaller lot than 80% of homes in Travis County
  • Older than 69% of homes in Austin 78747

What homes are worth in Austin 78747

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

This home
$258K$671K

This home is worth more than 15% of homes in Austin 78747.

How it measures up in Austin 78747

The dot is this home. The mark in the middle is the typical home in Austin 78747.

Estimated value$302,961
CheaperTypical $358,392Pricier

Pricier than 15% of homes nearby

Price per ft²$242
CheaperTypical $190Pricier

Pricier than 92% of homes nearby

Living area1,250 ft²
SmallerTypical 1,894 ft²Bigger

Bigger than 10% of homes nearby

Lot size0.13 ac
SmallerTypical 0.14 acBigger

Bigger than 39% of homes nearby

Year built2002
OlderTypical 2008Newer

Newer than 31% of homes nearby

How 8421 Alum Rock Dr ranks against every home in each area.
MeasureThis homeAustin 78747Travis County
Estimated valuepricier than$302,96115% of homes15% of homes
Price per ft²pricier than$24292% of homes40% of homes
Living areabigger than1,250 ft²10% of homes19% of homes
Lot sizebigger than0.13 ac39% of homes20% of homes
Year builtnewer than200231% of homes58% of homes

About 8421 Alum Rock Dr

How much is 8421 Alum Rock Dr, Austin, TX worth?

The TopHap Estimate for 8421 Alum Rock Dr, Austin, TX is $302,961 as of Sep 24, 2026. The likely range is $276,409 to $329,513. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 8421 Alum Rock Dr, Austin, TX last sell?

8421 Alum Rock Dr, Austin, TX last sold on Jun 19, 2002 for $101,700, according to the county's recorded deed.

How big is 8421 Alum Rock Dr, Austin, TX?

8421 Alum Rock Dr, Austin, TX has 2 bathrooms, 1,250 square feet of living space and a 0.13-acre lot.

When was 8421 Alum Rock Dr, Austin, TX built?

8421 Alum Rock Dr, Austin, TX was built in 2002, making it 24 years old. The building has 1 story.

What schools serve 8421 Alum Rock Dr, Austin, TX?

8421 Alum Rock Dr, Austin, TX is assigned to Palm Elementary School (elementary), rated C+; Akins High School (high), rated C; Paredes Middle School (middle), rated D. All sit in Austin Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 8421 Alum Rock Dr, Austin, TX compare to other homes in Austin 78747?

Among the 8,127 homes in Austin 78747, it is worth more than 15% of them ($302,961 against a typical $358,392), its price per square foot is higher than 92% of them ($242 against a typical $190), it is bigger than 10% of them (1,250 ft² against a typical 1,894 ft²), its lot is bigger than 39% of them (0.13 ac against a typical 0.14 ac) and it is newer than 31% of them (2002 against a typical 2008). Measured against all of Travis County, it is worth more than 15% 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 8421 Alum Rock Dr, Austin, TX?

The 2025 property tax bill for 8421 Alum Rock Dr, Austin, TX was $913. The county assessed it at $262,655.

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