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Multi-Family Dwellings (Generic, Any Combination)Residential
Last sold for $38,197,500 on Dec 21, 2018

1100 HIDDEN VALLEY DR

ROUND ROCK, TX 78665
0
Baths
285,760 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.
15.71 ac
Lot SizeThe size of the land the home sits on, from county records.
2016
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$38,197,500 · Dec 21, 2018
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.$382,936
PLANET HM LNDG · recorded Jul 15, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,068,680 (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.$59,395,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$5,815,674
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$53,579,326
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$61,005,087
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$59,395,000

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.24 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.Multi-Family Dwellings (Generic, Any Combination)
CountyWILLIAMSON
Lot (acres)The size of the land the home sits on, from county records.15.71
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

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.

E
Caldwell Heights Elementary SchoolB-
Elementary · Grades PK–5 · 0.5 mi
M
Hopewell Middle SchoolB-
Middle · Grades 6–8 · 1.1 mi
H
Stony Point High SchoolC+
High · Grades 9–12 · 2.3 mi

District: Round Rock 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.68,564
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.$112,731
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$135,299
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

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
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

1100 Hidden Valley Dr 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 largest homes in Round Rock 78665
  • Among the largest lots in Round Rock 78665
  • Newer than 69% of homes in Williamson County

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.

Living area285,760 ft²
SmallerTypical 2,319 ft²Bigger

Bigger than almost all homes nearby

Lot size15.71 ac
SmallerTypical 0.18 acBigger

Bigger than almost all homes nearby

Year built2016
OlderTypical 2010Newer

Newer than 66% of homes nearby

How 1100 Hidden Valley Dr ranks against every home in each area.
MeasureThis homeRound Rock 78665Williamson County
Living areabigger than285,760 ft²almost all homesalmost all homes
Lot sizebigger than15.71 acalmost all homesalmost all homes
Year builtnewer than201666% of homes69% of homes

About 1100 Hidden Valley Dr

When did 1100 Hidden Valley Dr, Round Rock, TX last sell?

1100 Hidden Valley Dr, Round Rock, TX last sold on Dec 21, 2018 for $38,197,500, according to the county's recorded deed.

How big is 1100 Hidden Valley Dr, Round Rock, TX?

1100 Hidden Valley Dr, Round Rock, TX has 285,760 square feet of living space and a 15.71-acre lot.

When was 1100 Hidden Valley Dr, Round Rock, TX built?

1100 Hidden Valley Dr, Round Rock, TX was built in 2016, making it 10 years old. The building has 1 story.

What schools serve 1100 Hidden Valley Dr, Round Rock, TX?

1100 Hidden Valley Dr, Round Rock, TX is assigned to Caldwell Heights Elementary School (elementary), rated B-; Hopewell Middle School (middle), rated B-; 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 1100 Hidden Valley Dr, Round Rock, TX compare to other homes in Round Rock 78665?

Among the 20,792 homes in Round Rock 78665, it is bigger than almost all of them (285,760 ft² against a typical 2,319 ft²), its lot is bigger than almost all of them (15.71 ac against a typical 0.18 ac) and it is newer than 66% of them (2016 against a typical 2010). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 1100 Hidden Valley Dr, Round Rock, TX?

The 2025 property tax bill for 1100 Hidden Valley Dr, Round Rock, TX was $1,068,680. The county assessed it at $59,395,000.

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Assigned schools

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