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Single Family ResidenceResidential
$168,551$234 / 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 95How 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

509 VALLEY ST

SAN MARCOS, TX 78666
0
Baths
720 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.
2014
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$169K
$160K low$177K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,740 (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.$179,174 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$55,780
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$123,394
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$190,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$179,174

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.96 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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 Residence
CountyHays
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 · 212 ft²

Transaction History(3)

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
Hernandez Elementary SchoolA-
Elementary · Grades KG–5 · 1.8 mi
M
Miller Middle SchoolC+
Middle · Grades 6–8 · 2.2 mi
H
San Marcos High SchoolC-
High · Grades 9–12 · 3.8 mi

District: San Marcos Consolidated Independent School District

Neighborhood · ZIP 78666These 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.131
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.72
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.16

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
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.99,796
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.548 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$54,287
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$69,670
Average tempThe average temperature here across a full year.68°F
Annual precipHow much rain and melted snow falls here in a typical year.37 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

509 Valley St 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.

  • Among the least valuable homes in Hays County
  • Costs more per square foot than 75% of homes in San Marcos 78666
  • Among the smallest homes in Hays County
  • Newer than 84% of homes in Dunbar

What homes are worth in San Marcos 78666

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

This home
$171K$900K

This home is worth more than 2% of homes in San Marcos 78666.

How it measures up in San Marcos 78666

The dot is this home. The mark in the middle is the typical home in San Marcos 78666.

Estimated value$168,551
CheaperTypical $327,927Pricier

Pricier than 2% of homes nearby

Price per ft²$234
CheaperTypical $197Pricier

Pricier than 75% of homes nearby

Living area720 ft²
SmallerTypical 1,648 ft²Bigger

Bigger than 3% of homes nearby

Year built2014
OlderTypical 2010Newer

Newer than 58% of homes nearby

How 509 Valley St ranks against every home in each area.
MeasureThis homeDunbarSan Marcos 78666Hays County
Estimated valuepricier than$168,55111% of homes2% of homesalmost no homes
Price per ft²pricier than$23457% of homes75% of homes67% of homes
Living areabigger than720 ft²13% of homes3% of homesalmost no homes
Year builtnewer than201484% of homes58% of homes55% of homes

About 509 Valley St

How much is 509 Valley St, San Marcos, TX worth?

The TopHap Estimate for 509 Valley St, San Marcos, TX is $168,551 as of Aug 30, 2026. The likely range is $160,323 to $176,779. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When was 509 Valley St, San Marcos, TX built?

509 Valley St, San Marcos, TX was built in 2014, making it 12 years old. The building has 1 story.

What schools serve 509 Valley St, San Marcos, TX?

509 Valley St, San Marcos, TX is assigned to Hernandez Elementary School (elementary), rated A-; Miller Middle School (middle), rated C+; San Marcos High School (high), rated C-. All sit in San Marcos Consolidated Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Valley St, San Marcos, TX compare to other homes in San Marcos 78666?

Among the 22,691 homes in San Marcos 78666, it is worth more than 2% of them ($168,551 against a typical $327,927), its price per square foot is higher than 75% of them ($234 against a typical $197), it is bigger than 3% of them (720 ft² against a typical 1,648 ft²) and it is newer than 58% of them (2014 against a typical 2010). Measured against all of Hays County, it is worth more than almost no 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 Valley St, San Marcos, TX?

The 2024 property tax bill for 509 Valley St, San Marcos, TX was $3,740. The county assessed it at $179,174.

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