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Single Family ResidenceResidential
$450,405$224 / 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 Jul 14, 2026

15777 N STATE HIGHWAY 123

SAN MARCOS, TX 78666
0
Baths
2,011 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.
1.07 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.
1
StoriesHow many floors the home has above ground.
4
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$450K
$414K low$487K 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.$450,405
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$360,324

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$399,768 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$158,638
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$241,130
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$418,873
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$399,768

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
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.Garage, Attached
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.Deck · 378 ft²Patio · 100 ft²Porch · 12 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.

M
Navarro Junior High SchoolB
Middle · Grades 7–8 · 9.0 mi
H
Navarro High SchoolB
High · Grades 9–12 · 9.1 mi
E
Navarro Elementary School
Elementary · Grades PK–3 · 9.1 mi

District: Navarro 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.Owner occupied
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

15777 N State Highway 123 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 more than 88% of homes in Guadalupe County
  • Costs more per square foot than 91% of homes in Guadalupe County
  • Bigger than 69% of homes in San Marcos 78666
  • Has a bigger lot than 91% of homes in Guadalupe County
  • Older than 68% 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
$161K$878K

This home is worth more than 78% 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$450,405
CheaperTypical $325,911Pricier

Pricier than 78% of homes nearby

Price per ft²$224
CheaperTypical $195Pricier

Pricier than 72% of homes nearby

Living area2,011 ft²
SmallerTypical 1,650 ft²Bigger

Bigger than 69% of homes nearby

Lot size1.07 ac
SmallerTypical 0.36 acBigger

Bigger than 76% of homes nearby

Year built1999
OlderTypical 2010Newer

Newer than 32% of homes nearby

How 15777 N State Highway 123 ranks against every home in each area.
MeasureThis homeSan Marcos 78666Guadalupe County
Estimated valuepricier than$450,40578% of homes88% of homes
Price per ft²pricier than$22472% of homes91% of homes
Living areabigger than2,011 ft²69% of homes57% of homes
Lot sizebigger than1.07 ac76% of homes91% of homes
Year builtnewer than199932% of homes35% of homes

About 15777 N State Highway 123

How much is 15777 N State Highway 123, San Marcos, TX worth?

The TopHap Estimate for 15777 N State Highway 123, San Marcos, TX is $450,405 as of Jul 14, 2026. The likely range is $414,252 to $486,558. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 15777 N State Highway 123, San Marcos, TX last sell?

15777 N State Highway 123, San Marcos, TX last sold on Sep 22, 2025, according to the county's recorded deed.

When was 15777 N State Highway 123, San Marcos, TX built?

15777 N State Highway 123, San Marcos, TX was built in 1999, making it 27 years old. The building has 1 story.

What schools serve 15777 N State Highway 123, San Marcos, TX?

15777 N State Highway 123, San Marcos, TX is assigned to Navarro Junior High School (middle), rated B; Navarro High School (high), rated B; Navarro Elementary School (elementary). All sit in Navarro Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 15777 N State Highway 123, 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 78% of them ($450,405 against a typical $325,911), its price per square foot is higher than 72% of them ($224 against a typical $195), it is bigger than 69% of them (2,011 ft² against a typical 1,650 ft²), its lot is bigger than 76% of them (1.07 ac against a typical 0.36 ac) and it is newer than 32% of them (1999 against a typical 2010). Measured against all of Guadalupe County, it is worth more than 88% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

Closest homes

More homes in San Marcos 78666

Assigned schools

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