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Single Family ResidenceResidential
$327,793$177 / 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 96How 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

5621 SACCO ST

ROUND ROCK, TX 78665
3
Beds
2
Baths
1,856 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.
2018
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

$328K
$315K low$341K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,899 (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.$368,341 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$85,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$282,841
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$386,607
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$368,341

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.Porch · 64 ft²

Transaction History(3)

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
Gus Almquist Middle SchoolB-
Middle · Grades 6–8 · 0.9 mi
E
Benjamin "Doc" Kerley Elementary SchoolB
Elementary · Grades PK–5 · 0.9 mi
H
Hutto High SchoolC+
High · Grades 10–12 · 2.6 mi

District: Hutto Independent School District

Neighborhood · ZIP 78665These 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.50
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.17

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.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.1%
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.68,549
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,056 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$112,722
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$135,285
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

5621 Sacco St 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 80% of homes in Round Rock 78665
  • Costs less per square foot than 71% of homes in Williamson County
  • Smaller than 75% of homes in Round Rock 78665
  • Newer than 77% of homes in Round Rock 78665

What homes are worth in Round Rock 78665

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

This home
$278K$782K

This home is worth more than 20% of homes in Round Rock 78665.

How it measures up in Round Rock 78665

The dot is this home. The mark in the middle is the typical home in Round Rock 78665.

Estimated value$327,793
CheaperTypical $395,674Pricier

Pricier than 20% of homes nearby

Price per ft²$177
CheaperTypical $178Pricier

Pricier than 47% of homes nearby

Living area1,856 ft²
SmallerTypical 2,314 ft²Bigger

Bigger than 25% of homes nearby

Year built2018
OlderTypical 2010Newer

Newer than 77% of homes nearby

How 5621 Sacco St ranks against every home in each area.
MeasureThis homeRound Rock 78665Williamson County
Estimated valuepricier than$327,79320% of homes27% of homes
Price per ft²pricier than$17747% of homes29% of homes
Living areabigger than1,856 ft²25% of homes37% of homes
Year builtnewer than201877% of homes75% of homes

About 5621 Sacco St

How much is 5621 Sacco St, Round Rock, TX worth?

The TopHap Estimate for 5621 Sacco St, Round Rock, TX is $327,793 as of Sep 24, 2026. The likely range is $314,535 to $341,051. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 5621 Sacco St, Round Rock, TX last sell?

5621 Sacco St, Round Rock, TX last sold on Aug 28, 2018, according to the county's recorded deed.

How big is 5621 Sacco St, Round Rock, TX?

5621 Sacco St, Round Rock, TX has 3 bedrooms, 2 bathrooms and 1,856 square feet of living space.

When was 5621 Sacco St, Round Rock, TX built?

5621 Sacco St, Round Rock, TX was built in 2018, making it 8 years old. The building has 1 story.

What schools serve 5621 Sacco St, Round Rock, TX?

5621 Sacco St, Round Rock, TX is assigned to Gus Almquist Middle School (middle), rated B-; Benjamin "Doc" Kerley Elementary School (elementary), rated B; Hutto High School (high), rated C+. All sit in Hutto Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 5621 Sacco St, Round Rock, TX compare to other homes in Round Rock 78665?

Among the 20,799 homes in Round Rock 78665, it is worth more than 20% of them ($327,793 against a typical $395,674), its price per square foot is higher than 47% of them ($177 against a typical $178), it is bigger than 25% of them (1,856 ft² against a typical 2,314 ft²) and it is newer than 77% of them (2018 against a typical 2010). Measured against all of Williamson County, it is worth more than 27% 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 5621 Sacco St, Round Rock, TX?

The 2025 property tax bill for 5621 Sacco St, Round Rock, TX was $8,899. The county assessed it at $368,341.

More homes on Sacco St

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More homes in Round Rock 78665

Assigned schools

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