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Single Family ResidenceResidential
$334,041$409 / 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 Aug 30, 2026

1135 MASON AVE

AUSTIN, TX 78721
1
Baths
816 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.
1957
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$334K
$310K low$358K high

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$267,509 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$228,649
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$108,586
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$243,190
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$337,235

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.49
25
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
47
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
99
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
43
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
33
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.7 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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
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.Wood Frame
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.None
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 · 192 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Norman - Sims Elementary SchoolD
Elementary · Grades PK–5 · 0.7 mi
M
Martin Middle SchoolF
Middle · Grades 6–8 · 3.1 mi
H
Northeast Early College High SchoolD+
High · Grades 9–12 · 3.4 mi

District: Austin Independent School District

Neighborhood · ZIP 78721These 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.133
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.20

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.17%
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.11,622
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,094 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,924
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$121,395
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

1135 Mason Ave 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 less than 81% of homes in Austin 78721
  • Costs more per square foot than 89% of homes in MLK-183
  • Smaller than 96% of homes in Travis County
  • Has a smaller lot than 73% of homes in Travis County
  • Older than 92% of homes in Travis County

What homes are worth in Austin 78721

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

This home
$263K$779K

This home is worth more than 19% of homes in Austin 78721.

How it measures up in Austin 78721

The dot is this home. The mark in the middle is the typical home in Austin 78721.

Estimated value$334,041
CheaperTypical $409,287Pricier

Pricier than 19% of homes nearby

Price per ft²$409
CheaperTypical $328Pricier

Pricier than 87% of homes nearby

Living area816 ft²
SmallerTypical 1,271 ft²Bigger

Bigger than 8% of homes nearby

Lot size0.14 ac
SmallerTypical 0.16 acBigger

Bigger than 40% of homes nearby

Year built1957
OlderTypical 1980Newer

Newer than 17% of homes nearby

How 1135 Mason Ave ranks against every home in each area.
MeasureThis homeMLK-183Austin 78721Travis County
Estimated valuepricier than$334,04130% of homes19% of homes22% of homes
Price per ft²pricier than$40989% of homes87% of homes80% of homes
Living areabigger than816 ft²8% of homes8% of homes4% of homes
Lot sizebigger than0.14 ac33% of homes40% of homes27% of homes
Year builtnewer than195717% of homes17% of homes8% of homes

About 1135 Mason Ave

How much is 1135 Mason Ave, Austin, TX worth?

The TopHap Estimate for 1135 Mason Ave, Austin, TX is $334,041 as of Aug 30, 2026. The likely range is $309,711 to $358,371. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1135 Mason Ave, Austin, TX last sell?

1135 Mason Ave, Austin, TX last sold on Dec 10, 1980, according to the county's recorded deed.

How big is 1135 Mason Ave, Austin, TX?

1135 Mason Ave, Austin, TX has 1 bathrooms, 816 square feet of living space and a 0.14-acre lot.

When was 1135 Mason Ave, Austin, TX built?

1135 Mason Ave, Austin, TX was built in 1957, making it 69 years old. The building has 1 story.

What schools serve 1135 Mason Ave, Austin, TX?

1135 Mason Ave, Austin, TX is assigned to Norman - Sims Elementary School (elementary), rated D; Martin Middle School (middle), rated F; Northeast Early College High School (high), rated D+. All sit in Austin Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1135 Mason Ave, Austin, TX compare to other homes in Austin 78721?

Among the 3,862 homes in Austin 78721, it is worth more than 19% of them ($334,041 against a typical $409,287), its price per square foot is higher than 87% of them ($409 against a typical $328), it is bigger than 8% of them (816 ft² against a typical 1,271 ft²), its lot is bigger than 40% of them (0.14 ac against a typical 0.16 ac) and it is newer than 17% of them (1957 against a typical 1980). Measured against all of Travis County, it is worth more than 22% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

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