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Single Family ResidenceResidential
$644,770$277 / 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 89How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

12005 ONION HOLLOW RUN

AUSTIN, TX 78739
3.5
Baths
2,326 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.
1.02 ac
Lot SizeThe size of the land the home sits on, from county records.
1985
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$645K
$576K low$713K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,685 (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.$644,077 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$252,290
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$391,787
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$711,762
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$644,077

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyTRAVIS
ConstructionThe main material the home's frame and walls are built from.Wood (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 · 174 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Bailey Middle SchoolB
Middle · Grades 6–8 · 0.7 mi
E
Baranoff Elementary SchoolA
Elementary · Grades KG–5 · 0.8 mi
H
Bowie High SchoolA
High · Grades 9–12 · 2.1 mi

District: Austin Independent School District

Neighborhood · ZIP 78739These 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.11
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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.40%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.23,000
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,029 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$182,479
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$206,478
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

12005 Onion Hollow Run 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 87% of homes in Austin 78739
  • Costs less per square foot than 71% of homes in Austin 78739
  • Smaller than 82% of homes in Austin 78739
  • Has a bigger lot than 97% of homes in Austin 78739
  • Older than 94% of homes in Austin 78739

What homes are worth in Austin 78739

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

This home
$544K$1.4M

This home is worth more than 13% of homes in Austin 78739.

How it measures up in Austin 78739

The dot is this home. The mark in the middle is the typical home in Austin 78739.

Estimated value$644,770
CheaperTypical $825,901Pricier

Pricier than 13% of homes nearby

Price per ft²$277
CheaperTypical $291Pricier

Pricier than 29% of homes nearby

Living area2,326 ft²
SmallerTypical 2,911 ft²Bigger

Bigger than 18% of homes nearby

Lot size1.02 ac
SmallerTypical 0.22 acBigger

Bigger than 97% of homes nearby

Year built1985
OlderTypical 2003Newer

Newer than 6% of homes nearby

How 12005 Onion Hollow Run ranks against every home in each area.
MeasureThis homeAustin 78739Travis County
Estimated valuepricier than$644,77013% of homes68% of homes
Price per ft²pricier than$27729% of homes53% of homes
Living areabigger than2,326 ft²18% of homes69% of homes
Lot sizebigger than1.02 ac97% of homes93% of homes
Year builtnewer than19856% of homes36% of homes

About 12005 Onion Hollow Run

How much is 12005 Onion Hollow Run, Austin, TX worth?

The TopHap Estimate for 12005 Onion Hollow Run, Austin, TX is $644,770 as of Oct 21, 2026. The likely range is $576,441 to $713,100. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12005 Onion Hollow Run, Austin, TX last sell?

12005 Onion Hollow Run, Austin, TX last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 12005 Onion Hollow Run, Austin, TX?

12005 Onion Hollow Run, Austin, TX has 3.5 bathrooms and 2,326 square feet of living space.

When was 12005 Onion Hollow Run, Austin, TX built?

12005 Onion Hollow Run, Austin, TX was built in 1985, making it 41 years old. The building has 1 story.

What schools serve 12005 Onion Hollow Run, Austin, TX?

12005 Onion Hollow Run, Austin, TX is assigned to Bailey Middle School (middle), rated B; Baranoff Elementary School (elementary), rated A; Bowie High School (high), rated A. All sit in Austin Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12005 Onion Hollow Run, Austin, TX compare to other homes in Austin 78739?

Among the 7,014 homes in Austin 78739, it is worth more than 13% of them ($644,770 against a typical $825,901), its price per square foot is higher than 29% of them ($277 against a typical $291), it is bigger than 18% of them (2,326 ft² against a typical 2,911 ft²), its lot is bigger than 97% of them (1.02 ac against a typical 0.22 ac) and it is newer than 6% of them (1985 against a typical 2003). Measured against all of Travis County, it is worth more than 68% 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 12005 Onion Hollow Run, Austin, TX?

The 2025 property tax bill for 12005 Onion Hollow Run, Austin, TX was $3,685. The county assessed it at $644,077.

More homes on Onion Hollow Run

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