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Farm (Irrigated Or Dry)Agriculture / Farming
$870,730$201 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

400 TATUM RD

SAN MARCOS, TX 78666
5
Beds
3
Baths
4,337 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.
10.92 ac
Lot SizeThe size of the land the home sits on, from county records.
1994
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

$871K
$835K low$906K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$870,730
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$696,584

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,332 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$448,317 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$57,092
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$273,132
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$561,711
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$448,317

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.27 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Farm (Irrigated Or Dry)
CountyGUADALUPE
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Carport (Unspecified)
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.Patio · 150 ft²Porch · 555 ft²

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.

E
DeZavala Elementary SchoolD+
Elementary · Grades KG–5 · 5.4 mi
M
Goodnight Middle SchoolC-
Middle · Grades 6–8 · 5.6 mi
H
San Marcos High SchoolC-
High · Grades 9–12 · 6.0 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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 Tatum 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.

  • Among the most valuable homes in Guadalupe County
  • Costs more per square foot than 86% of homes in Guadalupe County
  • Among the largest homes in San Marcos 78666
  • Among the largest lots in Guadalupe County
  • Older than 78% of homes in San Marcos 78666

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
$160K$878K

This home is worth more than 98% 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$870,730
CheaperTypical $325,116Pricier

Pricier than 98% of homes nearby

Price per ft²$201
CheaperTypical $195Pricier

Pricier than 55% of homes nearby

Living area4,337 ft²
SmallerTypical 1,647 ft²Bigger

Bigger than almost all homes nearby

Lot size10.92 ac
SmallerTypical 0.35 acBigger

Bigger than 97% of homes nearby

Year built1994
OlderTypical 2010Newer

Newer than 22% of homes nearby

How 400 Tatum Rd ranks against every home in each area.
MeasureThis homeSan Marcos 78666Guadalupe County
Estimated valuepricier than$870,73098% of homesalmost all homes
Price per ft²pricier than$20155% of homes86% of homes
Living areabigger than4,337 ft²almost all homesalmost all homes
Lot sizebigger than10.92 ac97% of homesalmost all homes
Year builtnewer than199422% of homes25% of homes

About 400 Tatum Rd

How much is 400 Tatum Rd, San Marcos, TX worth?

The TopHap Estimate for 400 Tatum Rd, San Marcos, TX is $870,730 as of Jul 14, 2026. The likely range is $835,059 to $906,401. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 400 Tatum Rd, San Marcos, TX last sell?

400 Tatum Rd, San Marcos, TX last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 400 Tatum Rd, San Marcos, TX?

400 Tatum Rd, San Marcos, TX has 5 bedrooms, 3 bathrooms and 4,337 square feet of living space.

When was 400 Tatum Rd, San Marcos, TX built?

400 Tatum Rd, San Marcos, TX was built in 1994, making it 32 years old. The building has 1 story.

What schools serve 400 Tatum Rd, San Marcos, TX?

400 Tatum Rd, San Marcos, TX is assigned to DeZavala Elementary School (elementary), rated D+; Goodnight 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 Tatum Rd, San Marcos, TX compare to other homes in San Marcos 78666?

Among the 22,772 homes in San Marcos 78666, it is worth more than 98% of them ($870,730 against a typical $325,116), its price per square foot is higher than 55% of them ($201 against a typical $195), it is bigger than almost all of them (4,337 ft² against a typical 1,647 ft²), its lot is bigger than 97% of them (10.92 ac against a typical 0.35 ac) and it is newer than 22% of them (1994 against a typical 2010). Measured against all of Guadalupe County, it is worth more than almost all 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 Tatum Rd, San Marcos, TX?

The 2025 property tax bill for 400 Tatum Rd, San Marcos, TX was $5,332. The county assessed it at $448,317.

Closest homes

More homes in San Marcos 78666

Assigned schools

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