Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$386,668$219 / 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 93How 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

237 GAMMENTHALER LN

HARPER, TX 78631
1
Baths
1,762 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.
4.7 ac
Lot SizeThe size of the land the home sits on, from county records.
1971
Year BuiltThe year the home was originally built, according to county records.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$387K
$359K low$414K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,172 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$353,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$118,440
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$235,360
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$362,560
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$353,800

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.51
10
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
83
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
90
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
39
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
37
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.1 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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
CountyGILLESPIE
Lot (acres)The size of the land the home sits on, from county records.4.70
RoofThe main material covering the roof, such as asphalt shingle or tile.Metal
HeatingThe type of heating system in the home.Yes
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.Shed · 110 ft²Porch · 462 ft²Greenhouse

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.

H
Harper High SchoolB+
High · Grades 9–12 · 1.4 mi
M
Harper Middle SchoolB+
Middle · Grades 5–8 · 1.4 mi
E
Harper Elementary SchoolA
Elementary · Grades PK–4 · 1.5 mi

District: Harper Independent School District

Neighborhood · ZIP 78631These 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.140
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
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.75%
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.8.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.2,672
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,116
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$100,317
Average tempThe average temperature here across a full year.65°F
Annual precipHow much rain and melted snow falls here in a typical year.30 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.65%

Owner Tools

Do you own this home?
Claim this home

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

237 Gammenthaler Ln 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 82% of homes in Gillespie County
  • Costs less per square foot than 91% of homes in Gillespie County
  • Has a bigger lot than 90% of homes in Gillespie County
  • Older than 86% of homes in Harper 78631

What homes are worth in Harper 78631

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

This home
$189K$986K

This home is worth more than 47% of homes in Harper 78631.

How it measures up in Harper 78631

The dot is this home. The mark in the middle is the typical home in Harper 78631.

Estimated value$386,668
CheaperTypical $399,409Pricier

Pricier than 47% of homes nearby

Price per ft²$219
CheaperTypical $243Pricier

Pricier than 35% of homes nearby

Living area1,762 ft²
SmallerTypical 1,664 ft²Bigger

Bigger than 55% of homes nearby

Lot size4.7 ac
SmallerTypical 1 acBigger

Bigger than 72% of homes nearby

Year built1971
OlderTypical 2002Newer

Newer than 14% of homes nearby

How 237 Gammenthaler Ln ranks against every home in each area.
MeasureThis homeHarper 78631Gillespie County
Estimated valuepricier than$386,66847% of homes18% of homes
Price per ft²pricier than$21935% of homes9% of homes
Living areabigger than1,762 ft²55% of homes47% of homes
Lot sizebigger than4.7 ac72% of homes90% of homes
Year builtnewer than197114% of homes20% of homes

About 237 Gammenthaler Ln

How much is 237 Gammenthaler Ln, Harper, TX worth?

The TopHap Estimate for 237 Gammenthaler Ln, Harper, TX is $386,668 as of Sep 24, 2026. The likely range is $358,866 to $414,470. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 237 Gammenthaler Ln, Harper, TX last sell?

237 Gammenthaler Ln, Harper, TX last sold on Mar 15, 2022, according to the county's recorded deed.

How big is 237 Gammenthaler Ln, Harper, TX?

237 Gammenthaler Ln, Harper, TX has 1 bathrooms, 1,762 square feet of living space and a 4.70-acre lot.

When was 237 Gammenthaler Ln, Harper, TX built?

237 Gammenthaler Ln, Harper, TX was built in 1971, making it 55 years old.

What schools serve 237 Gammenthaler Ln, Harper, TX?

237 Gammenthaler Ln, Harper, TX is assigned to Harper High School (high), rated B+; Harper Middle School (middle), rated B+; Harper Elementary School (elementary), rated A. All sit in Harper Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 237 Gammenthaler Ln, Harper, TX compare to other homes in Harper 78631?

Among the 1,608 homes in Harper 78631, it is worth more than 47% of them ($386,668 against a typical $399,409), its price per square foot is higher than 35% of them ($219 against a typical $243), it is bigger than 55% of them (1,762 ft² against a typical 1,664 ft²), its lot is bigger than 72% of them (4.7 ac against a typical 1 ac) and it is newer than 14% of them (1971 against a typical 2002). Measured against all of Gillespie County, it is worth more than 18% 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 237 Gammenthaler Ln, Harper, TX?

The 2026 property tax bill for 237 Gammenthaler Ln, Harper, TX was $3,172. The county assessed it at $353,800.

More homes on Gammenthaler Ln

Closest homes

More homes in Harper 78631

Assigned schools

Explore the area

See this home in context

Open 237 Gammenthaler Ln on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map