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Single Family ResidenceResidential
$136,102$102 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

509 AVENUE B

SWEENY, TX 77480
6
Baths
1,328 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
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

$136K
$128K low$144K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,145 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$105,442 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$40,630
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$93,870
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$95,856
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$134,500

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

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
CountyBrazoria
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.2000
Lot (acres)The size of the land the home sits on, from county records.0.29
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Block (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Wood Furnace
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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.Deck · 48 ft²Patio · 48 ft²Porch · 64 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.

M
Sweeny Jr High SchoolC
Middle · Grades 6–8 · 0.6 mi
E
Sweeny Elementary SchoolC
Elementary · Grades PK–5 · 0.9 mi
H
Sweeny High SchoolC+
High · Grades 9–12 · 0.9 mi

District: Sweeny Independent School District

Neighborhood · ZIP 77480These 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.119
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.22

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.87%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.9,431
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.67 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$77,962
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$91,833
Average tempThe average temperature here across a full year.69°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

509 Avenue B 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 96% of homes in Brazoria County
  • Costs less per square foot than 97% of homes in Brazoria County
  • Smaller than 79% of homes in Brazoria County
  • Has a smaller lot than 76% of homes in Sweeny 77480
  • Older than 98% of homes in Brazoria County

What homes are worth in Sweeny 77480

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

This home
$86K$659K

This home is worth more than 13% of homes in Sweeny 77480.

How it measures up in Sweeny 77480

The dot is this home. The mark in the middle is the typical home in Sweeny 77480.

Estimated value$136,102
CheaperTypical $231,696Pricier

Pricier than 13% of homes nearby

Price per ft²$102
CheaperTypical $145Pricier

Pricier than 8% of homes nearby

Living area1,328 ft²
SmallerTypical 1,561 ft²Bigger

Bigger than 36% of homes nearby

Lot size0.29 ac
SmallerTypical 0.99 acBigger

Bigger than 24% of homes nearby

Year built1940
OlderTypical 1980Newer

Newer than 4% of homes nearby

How 509 Avenue B ranks against every home in each area.
MeasureThis homeSweeny 77480Brazoria County
Estimated valuepricier than$136,10213% of homes4% of homes
Price per ft²pricier than$1028% of homes3% of homes
Living areabigger than1,328 ft²36% of homes21% of homes
Lot sizebigger than0.29 ac24% of homes63% of homes
Year builtnewer than19404% of homes2% of homes

About 509 Avenue B

How much is 509 Avenue B, Sweeny, TX worth?

The TopHap Estimate for 509 Avenue B, Sweeny, TX is $136,102 as of Sep 24, 2026. The likely range is $127,830 to $144,374. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 509 Avenue B, Sweeny, TX?

509 Avenue B, Sweeny, TX has 6 bathrooms, 1,328 square feet of living space and a 0.29-acre lot.

When was 509 Avenue B, Sweeny, TX built?

509 Avenue B, Sweeny, TX was built in 1940, making it 86 years old. The building has 1 story.

What schools serve 509 Avenue B, Sweeny, TX?

509 Avenue B, Sweeny, TX is assigned to Sweeny Jr High School (middle), rated C; Sweeny Elementary School (elementary), rated C; Sweeny High School (high), rated C+. All sit in Sweeny Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Avenue B, Sweeny, TX compare to other homes in Sweeny 77480?

Among the 3,054 homes in Sweeny 77480, it is worth more than 13% of them ($136,102 against a typical $231,696), its price per square foot is higher than 8% of them ($102 against a typical $145), it is bigger than 36% of them (1,328 ft² against a typical 1,561 ft²), its lot is bigger than 24% of them (0.29 ac against a typical 0.99 ac) and it is newer than 4% of them (1940 against a typical 1980). Measured against all of Brazoria County, it is worth more than 4% 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 509 Avenue B, Sweeny, TX?

The 2024 property tax bill for 509 Avenue B, Sweeny, TX was $1,145. The county assessed it at $105,442.

More homes on Avenue B

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