Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$203,919$236 / 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 Oct 21, 2026
Last sold for $139,300 on Apr 21, 2016

909 GREENBRIAR LOOP

ROUND ROCK, TX 78664
2
Baths
864 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.
0.1 ac
Lot SizeThe size of the land the home sits on, from county records.
1984
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

$204K
$189K low$219K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$139,300 · Apr 21, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,306 (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.$239,979 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$62,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$177,479
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$256,265
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$239,979

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.1994
Lot (acres)The size of the land the home sits on, from county records.0.10
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
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.Patio · 90 ft²Porch · 16 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.

E
Voigt Elementary SchoolC-
Elementary · Grades PK–5 · 0.5 mi
M
C.D. Fulkes Middle SchoolD-
Middle · Grades 6–8 · 1.2 mi
H
Cedar Ridge High SchoolB
High · Grades 9–12 · 1.5 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%

Owner Tools

Do you own this home?
Claim this home

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

909 Greenbriar Loop 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 least valuable homes in Round Rock 78664
  • Costs more per square foot than 91% of homes in Round Rock 78664
  • Among the smallest homes in Round Rock 78664
  • Among the smallest lots in Williamson County
  • Older than 87% of homes in Williamson County

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
$222K$804K

This home is worth less than almost all 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$203,919
CheaperTypical $319,096Pricier

Cheaper than almost all homes nearby

Price per ft²$236
CheaperTypical $191Pricier

Pricier than 91% of homes nearby

Living area864 ft²
SmallerTypical 1,778 ft²Bigger

Smaller than almost all homes nearby

Lot size0.1 ac
SmallerTypical 0.18 acBigger

Bigger than 4% of homes nearby

Year built1984
OlderTypical 1998Newer

Newer than 22% of homes nearby

How 909 Greenbriar Loop ranks against every home in each area.
MeasureThis homeRound Rock 78664Williamson County
Estimated valuepricier than$203,919almost no homes2% of homes
Price per ft²pricier than$23691% of homes83% of homes
Living areabigger than864 ft²almost no homesalmost no homes
Lot sizebigger than0.1 ac4% of homesalmost no homes
Year builtnewer than198422% of homes13% of homes

About 909 Greenbriar Loop

How much is 909 Greenbriar Loop, Round Rock, TX worth?

The TopHap Estimate for 909 Greenbriar Loop, Round Rock, TX is $203,919 as of Oct 21, 2026. The likely range is $188,881 to $218,957. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 909 Greenbriar Loop, Round Rock, TX last sell?

909 Greenbriar Loop, Round Rock, TX last sold on Apr 21, 2016 for $139,300, according to the county's recorded deed.

How big is 909 Greenbriar Loop, Round Rock, TX?

909 Greenbriar Loop, Round Rock, TX has 2 bathrooms, 864 square feet of living space and a 0.10-acre lot.

When was 909 Greenbriar Loop, Round Rock, TX built?

909 Greenbriar Loop, Round Rock, TX was built in 1984, making it 42 years old. The building has 1 story.

What schools serve 909 Greenbriar Loop, Round Rock, TX?

909 Greenbriar Loop, 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 909 Greenbriar Loop, Round Rock, TX compare to other homes in Round Rock 78664?

Among the 16,307 homes in Round Rock 78664, it is worth more than almost none of them ($203,919 against a typical $319,096), its price per square foot is higher than 91% of them ($236 against a typical $191), it is bigger than almost none of them (864 ft² against a typical 1,778 ft²), its lot is bigger than 4% of them (0.1 ac against a typical 0.18 ac) and it is newer than 22% of them (1984 against a typical 1998). Measured against all of Williamson County, it is worth more than 2% 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 909 Greenbriar Loop, Round Rock, TX?

The 2025 property tax bill for 909 Greenbriar Loop, Round Rock, TX was $3,306. The county assessed it at $239,979.

More homes on Greenbriar Loop

Closest homes

More homes in Round Rock 78664

Assigned schools

Explore the area

See this home in context

Open 909 Greenbriar Loop on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map