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Single Family ResidenceResidential
$603,205$352 / 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 96How 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 $419,900 on Nov 1, 2016

3101 CASTRO ST

AUSTIN, TX 78702
3
Baths
1,716 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1947
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$603K
$578K low$629K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$419,900 · Nov 1, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,538 (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.$564,330 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$281,118
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$283,212
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$533,869
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$564,330

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.22 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.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.Single Family Residence
CountyTRAVIS
Lot (acres)The size of the land the home sits on, from county records.0.14
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Pier/Post & Beam
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
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 · 153 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
Govalle Elementary SchoolF
Elementary · Grades PK–5 · 0.4 mi
H
Eastside Early College High SchoolF
High · Grades 9–12 · 1.5 mi
M
Martin Middle SchoolF
Middle · Grades 6–8 · 1.6 mi

District: Austin Independent School District

Neighborhood · ZIP 78702These 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.158
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.79
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.89%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.20%
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.26,747
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,159 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$81,325
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$119,659
Average tempThe average temperature here across a full year.68°F
Annual precipHow much rain and melted snow falls here in a typical year.34 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

3101 Castro 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.

  • Worth more than 65% of homes in Travis County
  • Costs less per square foot than 87% of homes in Austin 78702
  • Bigger than 72% of homes in Austin 78702
  • Has a smaller lot than 72% of homes in Travis County
  • Older than 97% of homes in Travis County

What homes are worth in Austin 78702

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

This home
$252K$1.3M

This home is worth more than 58% of homes in Austin 78702.

How it measures up in Austin 78702

The dot is this home. The mark in the middle is the typical home in Austin 78702.

Estimated value$603,205
CheaperTypical $552,438Pricier

Pricier than 58% of homes nearby

Price per ft²$352
CheaperTypical $446Pricier

Pricier than 13% of homes nearby

Living area1,716 ft²
SmallerTypical 1,251 ft²Bigger

Bigger than 72% of homes nearby

Lot size0.14 ac
SmallerTypical 0.12 acBigger

Bigger than 66% of homes nearby

Year built1947
OlderTypical 2004Newer

Newer than 27% of homes nearby

How 3101 Castro St ranks against every home in each area.
MeasureThis homeGovalleAustin 78702Travis County
Estimated valuepricier than$603,20560% of homes58% of homes65% of homes
Price per ft²pricier than$35216% of homes13% of homes73% of homes
Living areabigger than1,716 ft²71% of homes72% of homes42% of homes
Lot sizebigger than0.14 ac53% of homes66% of homes28% of homes
Year builtnewer than194718% of homes27% of homes3% of homes

About 3101 Castro St

How much is 3101 Castro St, Austin, TX worth?

The TopHap Estimate for 3101 Castro St, Austin, TX is $603,205 as of Oct 21, 2026. The likely range is $577,569 to $628,841. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3101 Castro St, Austin, TX last sell?

3101 Castro St, Austin, TX last sold on Nov 1, 2016 for $419,900, according to the county's recorded deed.

How big is 3101 Castro St, Austin, TX?

3101 Castro St, Austin, TX has 3 bathrooms, 1,716 square feet of living space and a 0.14-acre lot.

When was 3101 Castro St, Austin, TX built?

3101 Castro St, Austin, TX was built in 1947, making it 79 years old. The building has 1 story.

What schools serve 3101 Castro St, Austin, TX?

3101 Castro St, Austin, TX is assigned to Govalle Elementary School (elementary), rated F; Eastside Early College High School (high), rated F; Martin Middle School (middle), rated F. All sit in Austin Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3101 Castro St, Austin, TX compare to other homes in Austin 78702?

Among the 8,386 homes in Austin 78702, it is worth more than 58% of them ($603,205 against a typical $552,438), its price per square foot is higher than 13% of them ($352 against a typical $446), it is bigger than 72% of them (1,716 ft² against a typical 1,251 ft²), its lot is bigger than 66% of them (0.14 ac against a typical 0.12 ac) and it is newer than 27% of them (1947 against a typical 2004). Measured against all of Travis County, it is worth more than 65% 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 3101 Castro St, Austin, TX?

The 2025 property tax bill for 3101 Castro St, Austin, TX was $8,538. The county assessed it at $564,330.

More homes on Castro St

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