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Single Family ResidenceResidential
$309,597$259 / 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 71How 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

18121 FM 521 RD

ROSHARON, TX 77583
1
Baths
1,196 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.
0.68 ac
Lot SizeThe size of the land the home sits on, from county records.
2011
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

$310K
$220K low$399K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$534 (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.$174,183 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$47,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$150,650
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$158,348
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$198,250

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyBrazoria
Lot (acres)The size of the land the home sits on, from county records.0.68
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 · 48 ft²

Transaction History(1)

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
Heartland Elementary School
Elementary · Grades PK–5 · 7.3 mi
M
Heritage Junior High School
Middle · Grades 6–8 · 7.3 mi
H
Angleton High SchoolC
High · Grades 9–12 · 9.0 mi

District: Angleton Independent School District

Neighborhood · ZIP 77583These 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.72
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
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.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.47,650
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.298 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$107,106
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$133,090
Average tempThe average temperature here across a full year.69°F
Annual precipHow much rain and melted snow falls here in a typical year.52 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

Owner Tools

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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

18121 Fm 521 Rd 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 Rosharon 77583
  • Smaller than 91% of homes in Rosharon 77583
  • Has a bigger lot than 82% of homes in Rosharon 77583
  • Newer than 73% of homes in Brazoria County

What homes are worth in Rosharon 77583

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

This home
$188K$683K

This home is worth more than 50% of homes in Rosharon 77583.

How it measures up in Rosharon 77583

The dot is this home. The mark in the middle is the typical home in Rosharon 77583.

Estimated value$309,597
CheaperTypical $310,355Pricier

Pricier than 50% of homes nearby

Price per ft²$259
CheaperTypical $149Pricier

Pricier than 97% of homes nearby

Living area1,196 ft²
SmallerTypical 2,045 ft²Bigger

Bigger than 9% of homes nearby

Lot size0.68 ac
SmallerTypical 0.17 acBigger

Bigger than 82% of homes nearby

Year built2011
OlderTypical 2018Newer

Newer than 32% of homes nearby

How 18121 Fm 521 Rd ranks against every home in each area.
MeasureThis homeRosharon 77583Brazoria County
Estimated valuepricier than$309,59750% of homes44% of homes
Price per ft²pricier than$25997% of homes95% of homes
Living areabigger than1,196 ft²9% of homes15% of homes
Lot sizebigger than0.68 ac82% of homes78% of homes
Year builtnewer than201132% of homes73% of homes

About 18121 Fm 521 Rd

How much is 18121 Fm 521 Rd, Rosharon, TX worth?

The TopHap Estimate for 18121 Fm 521 Rd, Rosharon, TX is $309,597 as of Oct 21, 2026. The likely range is $220,376 to $398,818. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 18121 Fm 521 Rd, Rosharon, TX?

18121 Fm 521 Rd, Rosharon, TX has 1 bathrooms, 1,196 square feet of living space and a 0.68-acre lot.

When was 18121 Fm 521 Rd, Rosharon, TX built?

18121 Fm 521 Rd, Rosharon, TX was built in 2011, making it 15 years old. The building has 1 story.

What schools serve 18121 Fm 521 Rd, Rosharon, TX?

18121 Fm 521 Rd, Rosharon, TX is assigned to Heartland Elementary School (elementary); Heritage Junior High School (middle); Angleton High School (high), rated C. All sit in Angleton Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18121 Fm 521 Rd, Rosharon, TX compare to other homes in Rosharon 77583?

Among the 22,154 homes in Rosharon 77583, it is worth more than 50% of them ($309,597 against a typical $310,355), its price per square foot is higher than 97% of them ($259 against a typical $149), it is bigger than 9% of them (1,196 ft² against a typical 2,045 ft²), its lot is bigger than 82% of them (0.68 ac against a typical 0.17 ac) and it is newer than 32% of them (2011 against a typical 2018). Measured against all of Brazoria County, it is worth more than 44% 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 18121 Fm 521 Rd, Rosharon, TX?

The 2024 property tax bill for 18121 Fm 521 Rd, Rosharon, TX was $534. The county assessed it at $174,183.

More homes on Fm 521 Rd

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Assigned schools

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