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Residential (General/Single)Residential
$323,179$209 / 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 Jul 14, 2026

3900 UPPER PASSAGE LN

ROUND ROCK, TX 78681
0
Baths
1,548 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.
1.79 ac
Lot SizeThe size of the land the home sits on, from county records.
2009
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$323K
$293K low$354K 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.$323,179
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$258,543

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$400 (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.$30,134 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$536
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$29,598
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$27,071
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$30,134

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Residential (General/Single)
CountyWilliamson
Lot (acres)The size of the land the home sits on, from county records.1.79
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.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 264 ft²Porch · 912 ft²

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

E
Chandler Oaks Elementary SchoolA+
Elementary · Grades KG–5 · 0.1 mi
M
Walsh Middle SchoolA
Middle · Grades 6–8 · 1.6 mi
H
Stony Point High SchoolC+
High · Grades 9–12 · 4.7 mi

District: Round Rock Independent School District

Neighborhood · ZIP 78681These 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.44
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 100.20

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.38%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.9%
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.72,545
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,224 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,547
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$146,868
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

3900 Upper Passage Ln 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 98% of homes in Stone Oak
  • Costs less per square foot than 65% of homes in Round Rock 78681
  • Smaller than 94% of homes in Stone Oak
  • Among the largest lots in Stone Oak
  • Among the newest homes in Stone Oak

What homes are worth in Round Rock 78681

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

This home
$256K$1.1M

This home is worth more than 10% of homes in Round Rock 78681.

How it measures up in Round Rock 78681

The dot is this home. The mark in the middle is the typical home in Round Rock 78681.

Estimated value$323,179
CheaperTypical $498,013Pricier

Pricier than 10% of homes nearby

Price per ft²$209
CheaperTypical $219Pricier

Pricier than 35% of homes nearby

Living area1,548 ft²
SmallerTypical 2,315 ft²Bigger

Bigger than 15% of homes nearby

Lot size1.79 ac
SmallerTypical 0.2 acBigger

Bigger than 98% of homes nearby

Year built2009
OlderTypical 1998Newer

Newer than 84% of homes nearby

How 3900 Upper Passage Ln ranks against every home in each area.
MeasureThis homeStone OakRound Rock 78681Williamson County
Estimated valuepricier than$323,1792% of homes10% of homes22% of homes
Price per ft²pricier than$20960% of homes35% of homes57% of homes
Living areabigger than1,548 ft²6% of homes15% of homes20% of homes
Lot sizebigger than1.79 acalmost all homes98% of homes91% of homes
Year builtnewer than2009almost all homes84% of homes55% of homes

About 3900 Upper Passage Ln

How much is 3900 Upper Passage Ln, Round Rock, TX worth?

The TopHap Estimate for 3900 Upper Passage Ln, Round Rock, TX is $323,179 as of Jul 14, 2026. The likely range is $292,559 to $353,799. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3900 Upper Passage Ln, Round Rock, TX last sell?

3900 Upper Passage Ln, Round Rock, TX last sold on Nov 2, 2018, according to the county's recorded deed.

How big is 3900 Upper Passage Ln, Round Rock, TX?

3900 Upper Passage Ln, Round Rock, TX has 1,548 square feet of living space and a 1.79-acre lot.

When was 3900 Upper Passage Ln, Round Rock, TX built?

3900 Upper Passage Ln, Round Rock, TX was built in 2009, making it 17 years old. The building has 1 story.

What schools serve 3900 Upper Passage Ln, Round Rock, TX?

3900 Upper Passage Ln, Round Rock, TX is assigned to Chandler Oaks Elementary School (elementary), rated A+; Walsh Middle School (middle), rated A; Stony Point High School (high), rated C+. All sit in Round Rock Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3900 Upper Passage Ln, Round Rock, TX compare to other homes in Round Rock 78681?

Among the 18,081 homes in Round Rock 78681, it is worth more than 10% of them ($323,179 against a typical $498,013), its price per square foot is higher than 35% of them ($209 against a typical $219), it is bigger than 15% of them (1,548 ft² against a typical 2,315 ft²), its lot is bigger than 98% of them (1.79 ac against a typical 0.2 ac) and it is newer than 84% of them (2009 against a typical 1998). Measured against all of Williamson County, it is worth more than 22% 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 3900 Upper Passage Ln, Round Rock, TX?

The 2025 property tax bill for 3900 Upper Passage Ln, Round Rock, TX was $400. The county assessed it at $30,134.

More homes on Upper Passage Ln

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Assigned schools

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