Skip to content
Skip to content
TopHapOpen in map
Rural ResidenceResidential
$1,250,984$611 / 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 84How 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

863 BIG MOUNTAIN TRL

ROUND MOUNTAIN, TX 78663
2
Baths
2,046 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.
49.88 ac
Lot SizeThe size of the land the home sits on, from county records.
1982
Year BuiltThe year the home was originally built, according to county records.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.3M
$1.1M low$1.4M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,258 (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.$240,960 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$240,930
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,410,690

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.57
47
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
73
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
95
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
43
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
31
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.12 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.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.Rural Residence
CountyBLANCO
Lot (acres)The size of the land the home sits on, from county records.49.88
ConstructionThe main material the home's frame and walls are built from.Brick
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
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.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 168 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Lyndon B. Johnson Elementary School
Elementary · Grades PK–5 · 12.5 mi
H
Lyndon B. Johnson High SchoolB
High · Grades 9–12 · 15.0 mi
M
Lyndon B. Johnson Middle SchoolA-
Middle · Grades 6–8 · 15.5 mi

District: Johnson City Independent School District

Neighborhood · ZIP 78663These 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.58
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.78
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.17

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.78%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.1,238
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.10 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$111,216
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$136,274
Average tempThe average temperature here across a full year.66°F
Annual precipHow much rain and melted snow falls here in a typical year.33 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.60%

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

863 Big Mountain Trl 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 85% of homes in Blanco County
  • Costs more per square foot than 82% of homes in Blanco County
  • Has a bigger lot than 91% of homes in Blanco County
  • Older than 87% of homes in Round Mountain 78663

What homes are worth in Round Mountain 78663

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

This home
$420K$2.5M

This home is worth more than 77% of homes in Round Mountain 78663.

How it measures up in Round Mountain 78663

The dot is this home. The mark in the middle is the typical home in Round Mountain 78663.

Estimated value$1,250,984
CheaperTypical $904,161Pricier

Pricier than 77% of homes nearby

Price per ft²$611
CheaperTypical $404Pricier

Pricier than 80% of homes nearby

Living area2,046 ft²
SmallerTypical 2,128 ft²Bigger

Bigger than 47% of homes nearby

Lot size49.88 ac
SmallerTypical 7.58 acBigger

Bigger than 84% of homes nearby

Year built1982
OlderTypical 2008Newer

Newer than 13% of homes nearby

How 863 Big Mountain Trl ranks against every home in each area.
MeasureThis homeRound Mountain 78663Blanco County
Estimated valuepricier than$1,250,98477% of homes85% of homes
Price per ft²pricier than$61180% of homes82% of homes
Living areabigger than2,046 ft²47% of homes62% of homes
Lot sizebigger than49.88 ac84% of homes91% of homes
Year builtnewer than198213% of homes15% of homes

About 863 Big Mountain Trl

How much is 863 Big Mountain Trl, Round Mountain, TX worth?

The TopHap Estimate for 863 Big Mountain Trl, Round Mountain, TX is $1,250,984 as of Aug 30, 2026. The likely range is $1,053,384 to $1,448,584. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 863 Big Mountain Trl, Round Mountain, TX last sell?

863 Big Mountain Trl, Round Mountain, TX last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 863 Big Mountain Trl, Round Mountain, TX?

863 Big Mountain Trl, Round Mountain, TX has 2 bathrooms, 2,046 square feet of living space and a 49.88-acre lot.

When was 863 Big Mountain Trl, Round Mountain, TX built?

863 Big Mountain Trl, Round Mountain, TX was built in 1982, making it 44 years old.

What schools serve 863 Big Mountain Trl, Round Mountain, TX?

863 Big Mountain Trl, Round Mountain, TX is assigned to Lyndon B. Johnson Elementary School (elementary); Lyndon B. Johnson High School (high), rated B; Lyndon B. Johnson Middle School (middle), rated A-. All sit in Johnson City Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 863 Big Mountain Trl, Round Mountain, TX compare to other homes in Round Mountain 78663?

Among the 470 homes in Round Mountain 78663, it is worth more than 77% of them ($1,250,984 against a typical $904,161), its price per square foot is higher than 80% of them ($611 against a typical $404), it is bigger than 47% of them (2,046 ft² against a typical 2,128 ft²), its lot is bigger than 84% of them (49.88 ac against a typical 7.58 ac) and it is newer than 13% of them (1982 against a typical 2008). Measured against all of Blanco County, it is worth more than 85% 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 863 Big Mountain Trl, Round Mountain, TX?

The 2026 property tax bill for 863 Big Mountain Trl, Round Mountain, TX was $3,258. The county assessed it at $240,960.

More homes on Big Mountain Trl

Closest homes

More homes in Round Mountain 78663

Assigned schools

Explore the area

See this home in context

Open 863 Big Mountain Trl 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