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Single Family ResidenceResidential
$205,982$279 / 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 92How 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

400 ARMSTRONG ST

SAN MARCOS, TX 78666
0
Baths
738 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1945
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$206K
$190K low$221K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,380 (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.$119,320 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$41,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$78,020
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$120,910
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$119,320

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.71 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.Metal
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 · 54 ft²

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 · 1.6 mi
M
Miller Middle SchoolC+
Middle · Grades 6–8 · 2.0 mi
H
San Marcos High SchoolC-
High · Grades 9–12 · 3.4 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

400 Armstrong 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.

  • Worth less than 97% of homes in Hays County
  • Costs more per square foot than 97% of homes in Victory Gardens
  • Among the smallest homes in Hays County
  • Has a smaller lot than 94% of homes in San Marcos 78666
  • Among the oldest homes in Hays County

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
$161K$890K

This home is worth more than 9% 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$205,982
CheaperTypical $316,482Pricier

Pricier than 9% of homes nearby

Price per ft²$279
CheaperTypical $192Pricier

Pricier than 91% of homes nearby

Living area738 ft²
SmallerTypical 1,654 ft²Bigger

Bigger than 3% of homes nearby

Lot size0.11 ac
SmallerTypical 0.34 acBigger

Bigger than 6% of homes nearby

Year built1945
OlderTypical 2010Newer

Older than almost all homes nearby

How 400 Armstrong St ranks against every home in each area.
MeasureThis homeVictory GardensSan Marcos 78666Hays County
Estimated valuepricier than$205,98253% of homes9% of homes3% of homes
Price per ft²pricier than$27997% of homes91% of homes80% of homes
Living areabigger than738 ft²21% of homes3% of homesalmost no homes
Lot sizebigger than0.11 ac18% of homes6% of homes9% of homes
Year builtnewer than19454% of homesalmost no homesalmost no homes

About 400 Armstrong St

How much is 400 Armstrong St, San Marcos, TX worth?

The TopHap Estimate for 400 Armstrong St, San Marcos, TX is $205,982 as of Sep 24, 2026. The likely range is $190,481 to $221,483. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 400 Armstrong St, San Marcos, TX last sell?

400 Armstrong St, San Marcos, TX last sold on Nov 15, 2009, according to the county's recorded deed.

When was 400 Armstrong St, San Marcos, TX built?

400 Armstrong St, San Marcos, TX was built in 1945, making it 81 years old. The building has 1 story.

What schools serve 400 Armstrong St, San Marcos, TX?

400 Armstrong 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 400 Armstrong St, San Marcos, TX compare to other homes in San Marcos 78666?

Among the 22,690 homes in San Marcos 78666, it is worth more than 9% of them ($205,982 against a typical $316,482), its price per square foot is higher than 91% of them ($279 against a typical $192), it is bigger than 3% of them (738 ft² against a typical 1,654 ft²), its lot is bigger than 6% of them (0.11 ac against a typical 0.34 ac) and it is newer than almost none of them (1945 against a typical 2010). Measured against all of Hays County, it is worth more than 3% 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 400 Armstrong St, San Marcos, TX?

The 2024 property tax bill for 400 Armstrong St, San Marcos, TX was $2,380. The county assessed it at $119,320.

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