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8331 FATHOM CIR, AUSTIN, TX 78750

AUSTIN, 78750 — williamson County

5 bed4 bath1,664 sqftBuilt 1977

Property at a Glance

This home is estimated between $295,041 and $578,627, with a best estimate of $527,923. That places the property above the R371X - Round Rock West Below 45 - Duplex median of $419,343, in a neighborhood that declined 8.8% over the past year.

Estimated Value Range

$295,041 $578,627
Best Estimate
$527,923
WCAD Value
$438,156
High Confidence

Based on 5 comparable properties(5 in the same subdivision)

Based on 5 comparable properties in R371X - Round Rock West Below 45 - Duplex, this home's estimated market value is between $295,041 and $578,627. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

8333 FATHOM CIR, AUSTIN, TX 78750
0.01 mi 100% similar Same subdivision
5 bed 5 bath 1,660 sqft Built 1979
Raw Value $586,051
Adjusted Value $578,627

Adjusted +$843 for 4 sqft more living space and -$8,267 for being older. Net adjustment: -$7,424.

8329 FATHOM CIR, AUSTIN, TX 78750
0.01 mi 100% similar Same subdivision
6 bed 4 bath 1,092 sqft Built 1977
Raw Value $455,911
Adjusted Value $576,436

Adjusted +$120,525 for 572 sqft more living space. Net adjustment: +$120,525.

8335 FATHOM CIR, AUSTIN, TX 78750
0.03 mi 100% similar Same subdivision
5 bed 4 bath 1,560 sqft Built 1979
Raw Value $514,276
Adjusted Value $527,923

Adjusted +$21,914 for 104 sqft more living space and -$8,267 for being older. Net adjustment: +$13,647.

8327 FATHOM CIR, AUSTIN, TX 78750
0.03 mi 100% similar Same subdivision
4 bed 4 bath 2,472 sqft Built 1978
Raw Value $469,426
Adjusted Value $295,041

Adjusted -$170,252 for 808 sqft less living space and -$4,133 for being older. Net adjustment: -$174,385.

8325 FATHOM CIR, AUSTIN, TX 78750
0.04 mi 100% similar Same subdivision
4 bed 4 bath 2,236 sqft Built 1978
Raw Value $434,312
Adjusted Value $309,654

Adjusted -$120,525 for 572 sqft less living space and -$4,133 for being older. Net adjustment: -$124,658.

The Neighborhood

This home is valued 4.5% above the R371X - Round Rock West Below 45 - Duplex median of $419,343. With 462 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.8% over the past year.

R371X - Round Rock West Below 45 - Duplex

typical
462 Properties
$419,343 Median Value
-8.8% YoY Change
0% Have Pool
94% Have Garage
This Home
$438,156
Median
$419,343

This home is +4.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,550 across all districts. With a homestead exemption claimed, that drops to $6,759 — saving $1,791 per year. That's $563 per month a buyer should budget. The assessed value increased roughly in line with the neighborhood, so a tax protest is unlikely to yield significant savings.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$3,913
AustinCity0.5240%$2,296
Williamson CountyCounty0.3694%$1,619
Austin Community Collegespecial0.1034%$453
Williamson County FM/RdCounty0.0443%$194
Upper Brushy Creek WCIDWater0.0170%$74
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$8,550

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $527,923 would pay approximately $3,295 per month (principal and interest only, excluding taxes and insurance).

Data sourced from Williamson County Appraisal District (WCAD), Texas Education Agency (TEA), and Federal Reserve Economic Data (FRED). Assessment values reflect the appraisal district's estimate, not market sale prices. Report generated 4/18/2026.

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