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Single Family ResidenceResidential
$430,629$213 / 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 86How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

528 KOLBO DR

ROUND ROCK, TX 78665
3
Beds
2
Baths
2,018 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
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

$431K
$372K low$489K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,585 (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.$470,986 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$137,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$333,986
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$496,538
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$470,986

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.80 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
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.0.2 percent flood zone

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
Lot (acres)The size of the land the home sits on, from county records.0.21
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 · 254 ft²

Transaction History(1)

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
Ridgeview Middle SchoolA-
Middle · Grades 6–8 · 1.4 mi
E
Blackland Prairie Elementary SchoolA-
Elementary · Grades KG–5 · 1.5 mi
H
Cedar Ridge High SchoolB
High · Grades 9–12 · 2.2 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.68,549
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

528 Kolbo 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 least valuable homes in Forest Grove
  • Costs more per square foot than 90% of homes in Round Rock 78665
  • Among the smallest homes in Forest Grove
  • Has a smaller lot than 81% of homes in Forest Grove
  • Newer than 88% of homes in Forest Grove

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
$283K$779K

This home is worth more than 58% 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$430,629
CheaperTypical $405,791Pricier

Pricier than 58% of homes nearby

Price per ft²$213
CheaperTypical $183Pricier

Pricier than 90% of homes nearby

Living area2,018 ft²
SmallerTypical 2,317 ft²Bigger

Bigger than 34% of homes nearby

Lot size0.21 ac
SmallerTypical 0.18 acBigger

Bigger than 73% of homes nearby

Year built2018
OlderTypical 2010Newer

Newer than 77% of homes nearby

How 528 Kolbo Dr ranks against every home in each area.
MeasureThis homeForest GroveRound Rock 78665Williamson County
Estimated valuepricier than$430,629almost no homes58% of homes56% of homes
Price per ft²pricier than$21377% of homes90% of homes64% of homes
Living areabigger than2,018 ft²almost no homes34% of homes46% of homes
Lot sizebigger than0.21 ac19% of homes73% of homes57% of homes
Year builtnewer than201888% of homes77% of homes75% of homes

About 528 Kolbo Dr

How much is 528 Kolbo Dr, Round Rock, TX worth?

The TopHap Estimate for 528 Kolbo Dr, Round Rock, TX is $430,629 as of Aug 30, 2026. The likely range is $371,764 to $489,494. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 528 Kolbo Dr, Round Rock, TX last sell?

528 Kolbo Dr, Round Rock, TX last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 528 Kolbo Dr, Round Rock, TX?

528 Kolbo Dr, Round Rock, TX has 3 bedrooms, 2 bathrooms, 2,018 square feet of living space and a 0.21-acre lot.

When was 528 Kolbo Dr, Round Rock, TX built?

528 Kolbo Dr, Round Rock, TX was built in 2018, making it 8 years old. The building has 1 story.

What schools serve 528 Kolbo Dr, Round Rock, TX?

528 Kolbo Dr, Round Rock, TX is assigned to Ridgeview Middle School (middle), rated A-; Blackland Prairie Elementary School (elementary), rated A-; 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 528 Kolbo Dr, Round Rock, TX compare to other homes in Round Rock 78665?

Among the 20,801 homes in Round Rock 78665, it is worth more than 58% of them ($430,629 against a typical $405,791), its price per square foot is higher than 90% of them ($213 against a typical $183), it is bigger than 34% of them (2,018 ft² against a typical 2,317 ft²), its lot is bigger than 73% of them (0.21 ac against a typical 0.18 ac) and it is newer than 77% of them (2018 against a typical 2010). Measured against all of Williamson County, it is worth more than 56% 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 528 Kolbo Dr, Round Rock, TX?

The 2025 property tax bill for 528 Kolbo Dr, Round Rock, TX was $7,585. The county assessed it at $470,986.

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