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Single Family ResidenceResidential
$485,131$171 / 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

409 ROCK KNOLL ST

LIBERTY HILL, TX 78642
4
Beds
4
Baths
2,829 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.
2021
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

$485K
$450K low$520K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,333 (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.$549,760 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$88,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$461,260
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$529,846
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$549,760

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.52
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
68
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
100
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
46
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
46
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Mat/Raft Foundation (Slab)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 261 ft²

Transaction History(2)

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
Santa Rita Elementary SchoolA
Elementary · Grades PK–5 · 0.6 mi
M
Santa Rita Middle SchoolB+
Middle · Grades 6–8 · 0.8 mi
H
Liberty Hill High SchoolB+
High · Grades 9–12 · 6.9 mi

District: Liberty Hill Independent School District

Neighborhood · ZIP 78642These 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.69
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.19

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.21,590
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.222 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$117,372
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$133,171
Average tempThe average temperature here across a full year.67°F
Annual precipHow much rain and melted snow falls here in a typical year.33 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.60%

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

409 Rock Knoll 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.

  • Costs less per square foot than 79% of homes in Williamson County
  • Bigger than 78% of homes in Williamson County
  • Newer than 89% of homes in Williamson County

What homes are worth in Liberty Hill 78642

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

This home
$287K$1.2M

This home is worth more than 47% of homes in Liberty Hill 78642.

How it measures up in Liberty Hill 78642

The dot is this home. The mark in the middle is the typical home in Liberty Hill 78642.

Estimated value$485,131
CheaperTypical $500,074Pricier

Pricier than 47% of homes nearby

Price per ft²$171
CheaperTypical $201Pricier

Pricier than 22% of homes nearby

Living area2,829 ft²
SmallerTypical 2,420 ft²Bigger

Bigger than 67% of homes nearby

Year built2021
OlderTypical 2019Newer

Newer than 74% of homes nearby

How 409 Rock Knoll St ranks against every home in each area.
MeasureThis homeSanta Rita RanchLiberty Hill 78642Williamson County
Estimated valuepricier than$485,13149% of homes47% of homes64% of homes
Price per ft²pricier than$17123% of homes22% of homes21% of homes
Living areabigger than2,829 ft²57% of homes67% of homes78% of homes
Year builtnewer than202164% of homes74% of homes89% of homes

About 409 Rock Knoll St

How much is 409 Rock Knoll St, Liberty Hill, TX worth?

The TopHap Estimate for 409 Rock Knoll St, Liberty Hill, TX is $485,131 as of Jul 14, 2026. The likely range is $450,049 to $520,213. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 409 Rock Knoll St, Liberty Hill, TX last sell?

409 Rock Knoll St, Liberty Hill, TX last sold on Jul 13, 2021, according to the county's recorded deed.

How big is 409 Rock Knoll St, Liberty Hill, TX?

409 Rock Knoll St, Liberty Hill, TX has 4 bedrooms, 4 bathrooms and 2,829 square feet of living space.

When was 409 Rock Knoll St, Liberty Hill, TX built?

409 Rock Knoll St, Liberty Hill, TX was built in 2021, making it 5 years old. The building has 1 story.

What schools serve 409 Rock Knoll St, Liberty Hill, TX?

409 Rock Knoll St, Liberty Hill, TX is assigned to Santa Rita Elementary School (elementary), rated A; Santa Rita Middle School (middle), rated B+; Liberty Hill High School (high), rated B+. All sit in Liberty Hill Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 409 Rock Knoll St, Liberty Hill, TX compare to other homes in Liberty Hill 78642?

Among the 13,223 homes in Liberty Hill 78642, it is worth more than 47% of them ($485,131 against a typical $500,074), its price per square foot is higher than 22% of them ($171 against a typical $201), it is bigger than 67% of them (2,829 ft² against a typical 2,420 ft²) and it is newer than 74% of them (2021 against a typical 2019). Measured against all of Williamson County, it is worth more than 64% 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 409 Rock Knoll St, Liberty Hill, TX?

The 2025 property tax bill for 409 Rock Knoll St, Liberty Hill, TX was $9,333. The county assessed it at $549,760.

More homes on Rock Knoll St

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More homes in Liberty Hill 78642

Assigned schools

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