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Single Family ResidentialResidential
$599,900$400 / 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 90How 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

3142 COUNTY ROAD 309

BRAZORIA, TX 77422
1
Baths
1,500 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.
8.24 ac
Lot SizeThe size of the land the home sits on, from county records.
2010
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$600K
$543K low$657K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,476 (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.$192,910 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$36,530
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$156,380
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$375,031
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$321,180

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.169 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.100%

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 Residential
CountyBrazoria
Lot (acres)The size of the land the home sits on, from county records.8.24
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Mat/Raft Foundation (Slab)
RoofThe main material covering the roof, such as asphalt shingle or tile.Metal
HeatingThe type of heating system in the home.Electric
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 · 700 ft²Boat access

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 · 9.7 mi
E
Sweeny Elementary SchoolC
Elementary · Grades PK–5 · 9.8 mi
H
Sweeny High SchoolB
High · Grades 9–12 · 10.0 mi

District: Sweeny Independent School District

Neighborhood · ZIP 77422These 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.136
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.95
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.14

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.86%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.13%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.17,079
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.91 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$69,282
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$90,024
Average tempThe average temperature here across a full year.70°F
Annual precipHow much rain and melted snow falls here in a typical year.51 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

3142 County Road 309 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 97% of homes in Brazoria 77422
  • Among the highest price per square foot in Brazoria 77422
  • Smaller than 71% of homes in Brazoria County
  • Has a bigger lot than 98% of homes in Brazoria County
  • Newer than 82% of homes in Brazoria 77422

What homes are worth in Brazoria 77422

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

This home
$92K$688K

This home is worth more than 97% of homes in Brazoria 77422.

How it measures up in Brazoria 77422

The dot is this home. The mark in the middle is the typical home in Brazoria 77422.

Estimated value$599,900
CheaperTypical $244,154Pricier

Pricier than 97% of homes nearby

Price per ft²$400
CheaperTypical $164Pricier

Pricier than almost all homes nearby

Living area1,500 ft²
SmallerTypical 1,456 ft²Bigger

Bigger than 53% of homes nearby

Lot size8.24 ac
SmallerTypical 0.99 acBigger

Bigger than 92% of homes nearby

Year built2010
OlderTypical 1985Newer

Newer than 82% of homes nearby

How 3142 County Road 309 ranks against every home in each area.
MeasureThis homeBrazoria 77422Brazoria County
Estimated valuepricier than$599,90097% of homes93% of homes
Price per ft²pricier than$400almost all homesalmost all homes
Living areabigger than1,500 ft²53% of homes29% of homes
Lot sizebigger than8.24 ac92% of homes98% of homes
Year builtnewer than201082% of homes72% of homes

About 3142 County Road 309

How much is 3142 County Road 309, Brazoria, TX worth?

The TopHap Estimate for 3142 County Road 309, Brazoria, TX is $599,900 as of Aug 30, 2026. The likely range is $542,774 to $657,026. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3142 County Road 309, Brazoria, TX last sell?

3142 County Road 309, Brazoria, TX last sold on Sep 25, 2025, according to the county's recorded deed.

How big is 3142 County Road 309, Brazoria, TX?

3142 County Road 309, Brazoria, TX has 1 bathrooms, 1,500 square feet of living space and a 8.24-acre lot.

When was 3142 County Road 309, Brazoria, TX built?

3142 County Road 309, Brazoria, TX was built in 2010, making it 16 years old. The building has 1 story.

What schools serve 3142 County Road 309, Brazoria, TX?

3142 County Road 309, Brazoria, TX is assigned to Sweeny Jr High School (middle), rated C+; Sweeny Elementary School (elementary), rated C; Sweeny High School (high), rated B. All sit in Sweeny Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3142 County Road 309, Brazoria, TX compare to other homes in Brazoria 77422?

Among the 6,009 homes in Brazoria 77422, it is worth more than 97% of them ($599,900 against a typical $244,154), its price per square foot is higher than almost all of them ($400 against a typical $164), it is bigger than 53% of them (1,500 ft² against a typical 1,456 ft²), its lot is bigger than 92% of them (8.24 ac against a typical 0.99 ac) and it is newer than 82% of them (2010 against a typical 1985). Measured against all of Brazoria County, it is worth more than 93% 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 3142 County Road 309, Brazoria, TX?

The 2024 property tax bill for 3142 County Road 309, Brazoria, TX was $1,476. The county assessed it at $192,910.

More homes on County Road 309

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