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Single Family ResidenceResidential
$234,422$181 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

503 RUBIO AVE

ROUND ROCK, TX 78664
1
Baths
1,292 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$234K
$219K low$250K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$0
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$0
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.96%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$258,750
INVESTOR MORTGAGE FINANCE LLC · recorded Apr 5, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,245 (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.$233,252 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$79,035
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$154,217
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$219,793
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$233,252

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.12 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
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.1978
Lot (acres)The size of the land the home sits on, from county records.0.18
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Pier/Post & Beam
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.Porch · 96 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
Voigt Elementary SchoolC
Elementary · Grades PK–5 · 0.4 mi
M
C.D. Fulkes Middle SchoolD+
Middle · Grades 6–8 · 0.7 mi
H
Cedar Ridge High SchoolB
High · Grades 9–12 · 2.4 mi

District: Round Rock Independent School District

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%

Ownership

Company ownedWhether the owner is a company or trust rather than a person.Yes

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

503 Rubio Ave 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 97% of homes in Round Rock 78664
  • Costs less per square foot than 71% of homes in Williamson County
  • Smaller than 93% of homes in Williamson County
  • Among the oldest homes in Round Rock 78664

What homes are worth in Round Rock 78664

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

This home
$224K$917K

This home is worth more than 3% of 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.

Estimated value$234,422
CheaperTypical $337,883Pricier

Pricier than 3% of homes nearby

Price per ft²$181
CheaperTypical $199Pricier

Pricier than 31% of homes nearby

Living area1,292 ft²
SmallerTypical 1,764 ft²Bigger

Bigger than 17% of homes nearby

Lot size0.18 ac
SmallerTypical 0.18 acBigger

Bigger than 52% of homes nearby

Year built1940
OlderTypical 1998Newer

Older than almost all homes nearby

How 503 Rubio Ave ranks against every home in each area.
MeasureThis homeRound Rock 78664Williamson County
Estimated valuepricier than$234,4223% of homes3% of homes
Price per ft²pricier than$18131% of homes29% of homes
Living areabigger than1,292 ft²17% of homes7% of homes
Lot sizebigger than0.18 ac52% of homes39% of homes
Year builtnewer than1940almost no homes2% of homes

About 503 Rubio Ave

How much is 503 Rubio Ave, Round Rock, TX worth?

The TopHap Estimate for 503 Rubio Ave, Round Rock, TX is $234,422 as of Jul 14, 2026. The likely range is $218,777 to $250,067. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 503 Rubio Ave, Round Rock, TX last sell?

503 Rubio Ave, Round Rock, TX last sold on Feb 23, 2022, according to the county's recorded deed.

How big is 503 Rubio Ave, Round Rock, TX?

503 Rubio Ave, Round Rock, TX has 1 bathrooms, 1,292 square feet of living space and a 0.18-acre lot.

When was 503 Rubio Ave, Round Rock, TX built?

503 Rubio Ave, Round Rock, TX was built in 1940, making it 86 years old. The building has 1 story.

What schools serve 503 Rubio Ave, Round Rock, TX?

503 Rubio Ave, Round Rock, TX is assigned to Voigt Elementary School (elementary), rated C; C.D. Fulkes Middle School (middle), rated D+; Cedar Ridge High School (high), rated B. All sit in Round Rock Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 503 Rubio Ave, Round Rock, TX compare to other homes in Round Rock 78664?

Among the 17,092 homes in Round Rock 78664, it is worth more than 3% of them ($234,422 against a typical $337,883), its price per square foot is higher than 31% of them ($181 against a typical $199), it is bigger than 17% of them (1,292 ft² against a typical 1,764 ft²), its lot is bigger than 52% of them (0.18 ac against a typical 0.18 ac) and it is newer than almost none of them (1940 against a typical 1998). Measured against all of Williamson County, it is worth more than 3% 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 503 Rubio Ave, Round Rock, TX?

The 2025 property tax bill for 503 Rubio Ave, Round Rock, TX was $3,245. The county assessed it at $233,252.

More homes on Rubio Ave

Closest homes

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Assigned schools

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See this home in context

Open 503 Rubio Aveon TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

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