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Single Family ResidentialResidential
$316,844$298 / 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 83How 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

FM 521

TX
0
Baths
1,064 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.
6.73 ac
Lot SizeThe size of the land the home sits on, from county records.
1999
Year BuiltThe year the home was originally built, according to county records.

Valuation

$317K
$262K low$372K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,399 (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.$263,620 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$228,310
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$35,310
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$269,210
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$263,620

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.60
60
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
46
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
96
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
52
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
48
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.48 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.54%
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.1 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 Residential
CountyBrazoria
Lot (acres)The size of the land the home sits on, from county records.6.73
HeatingThe type of heating system in the home.None
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Sweeny Elementary SchoolC
Elementary · Grades PK–5 · 4.6 mi
M
Sweeny Jr High SchoolC+
Middle · Grades 6–8 · 4.8 mi
H
Sweeny High SchoolB
High · Grades 9–12 · 5.0 mi

District: Sweeny Independent School District

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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

Fm 521 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.

  • Costs more per square foot than 97% of homes in Brazoria County
  • Smaller than 90% of homes in Brazoria County
  • Has a bigger lot than 97% of homes in Brazoria County

How it measures up in Brazoria County

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

Estimated value$316,844
CheaperTypical $328,430Pricier

Pricier than 46% of homes nearby

Price per ft²$298
CheaperTypical $157Pricier

Pricier than 97% of homes nearby

Living area1,064 ft²
SmallerTypical 1,925 ft²Bigger

Bigger than 10% of homes nearby

Lot size6.73 ac
SmallerTypical 0.22 acBigger

Bigger than 97% of homes nearby

Year built1999
OlderTypical 2000Newer

Newer than 49% of homes nearby

How Fm 521 ranks against every home in each area.
MeasureThis homeBrazoria County
Estimated valuepricier than$316,84446% of homes
Price per ft²pricier than$29897% of homes
Living areabigger than1,064 ft²10% of homes
Lot sizebigger than6.73 ac97% of homes
Year builtnewer than199949% of homes

About Fm 521

How much is Fm 521, , TX worth?

The TopHap Estimate for Fm 521, , TX is $316,844 as of Sep 24, 2026. The likely range is $261,770 to $371,918. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did Fm 521, , TX last sell?

Fm 521, , TX last sold on Jun 2, 1994, according to the county's recorded deed.

How big is Fm 521, , TX?

Fm 521, , TX has 1,064 square feet of living space and a 6.73-acre lot.

When was Fm 521, , TX built?

Fm 521, , TX was built in 1999, making it 27 years old.

What schools serve Fm 521, , TX?

Fm 521, , TX is assigned to Sweeny Elementary School (elementary), rated C; Sweeny Jr High School (middle), 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 Fm 521, , TX compare to other homes in Brazoria County?

Among the 132,989 homes in Brazoria County, it is worth more than 46% of them ($316,844 against a typical $328,430), its price per square foot is higher than 97% of them ($298 against a typical $157), it is bigger than 10% of them (1,064 ft² against a typical 1,925 ft²), its lot is bigger than 97% of them (6.73 ac against a typical 0.22 ac) and it is newer than 49% of them (1999 against a typical 2000). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on Fm 521, , TX?

The 2024 property tax bill for Fm 521, , TX was $4,399. The county assessed it at $263,620.

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Assigned schools

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