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Rural ResidenceResidential

4285 COUNTY ROAD 123

ROUND ROCK, TX 78664
0
Baths
816 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.
279.33 ac
Lot SizeThe size of the land the home sits on, from county records.
1929
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,383 (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.$235,603 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$246,685
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$4,647,594

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Rural Residence
CountyWILLIAMSON
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.1979
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

Neighborhood · ZIP 78664These 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.87
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.13

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.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.6%
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.72,016
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,336 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,209
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$105,122
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

4285 County Road 123 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 smallest homes in Williamson County
  • Among the largest lots in Round Rock 78664
  • Among the oldest homes in Round Rock 78664

How it measures up in Round Rock 78664

The dot is this home. The mark in the middle is the typical home in Round Rock 78664.

Living area816 ft²
SmallerTypical 1,765 ft²Bigger

Smaller than almost all homes nearby

Lot size279.33 ac
SmallerTypical 0.18 acBigger

Bigger than almost all homes nearby

Year built1929
OlderTypical 1998Newer

Older than almost all homes nearby

How 4285 County Road 123 ranks against every home in each area.
MeasureThis homeRound Rock 78664Williamson County
Living areabigger than816 ft²almost no homesalmost no homes
Lot sizebigger than279.33 acalmost all homesalmost all homes
Year builtnewer than1929almost no homesalmost no homes

About 4285 County Road 123

When did 4285 County Road 123, Round Rock, TX last sell?

4285 County Road 123, Round Rock, TX last sold on Jan 1, 1900, according to the county's recorded deed.

When was 4285 County Road 123, Round Rock, TX built?

4285 County Road 123, Round Rock, TX was built in 1929, making it 97 years old. The building has 1 story.

How does 4285 County Road 123, Round Rock, TX compare to other homes in Round Rock 78664?

Among the 16,951 homes in Round Rock 78664, it is bigger than almost none of them (816 ft² against a typical 1,765 ft²), its lot is bigger than almost all of them (279.33 ac against a typical 0.18 ac) and it is newer than almost none of them (1929 against a typical 1998). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 4285 County Road 123, Round Rock, TX?

The 2025 property tax bill for 4285 County Road 123, Round Rock, TX was $4,383. The county assessed it at $235,603.

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