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908 MAMMOTH CT, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath966 sqftBuilt 2000

Property at a Glance

This home is estimated between $333,535 and $406,801, with a best estimate of $346,983. That places the property below the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194, in a neighborhood that declined 10.9% over the past year.

Estimated Value Range

$333,535 $406,801
Best Estimate
$346,983
WCAD Value
$370,309
High Confidence

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

Based on 5 comparable properties in R107503F - PRESERVE AT STONE OAK - PH 3 & 4, this home's estimated market value is between $333,535 and $406,801. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

904 MAMMOTH CT, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 920 sqft Built 2000
Raw Value $397,437
Adjusted Value $406,801

Adjusted +$9,364 for 46 sqft more living space. Net adjustment: +$9,364.

905 MAMMOTH CT, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 966 sqft Built 2000
Raw Value $367,096
Adjusted Value $367,096

This comparable closely matches the subject property's features.

903 MAMMOTH CT, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,105 sqft Built 2000
Raw Value $375,280
Adjusted Value $346,983

Adjusted -$28,297 for 139 sqft less living space. Net adjustment: -$28,297.

907 MAMMOTH CT, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,105 sqft Built 2000
Raw Value $361,832
Adjusted Value $333,535

Adjusted -$28,297 for 139 sqft less living space. Net adjustment: -$28,297.

911 MAMMOTH CT, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,105 sqft Built 2000
Raw Value $363,033
Adjusted Value $334,736

Adjusted -$28,297 for 139 sqft less living space. Net adjustment: -$28,297.

The Neighborhood

This home is in line with the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194. Note that values in this subdivision declined 10.9% over the past year.

R107503F - PRESERVE AT STONE OAK - PH 3 & 4

typical
1,045 Properties
$368,194 Median Value
-10.9% YoY Change
1% Have Pool
99% Have Garage
This Home
$370,309
Median
$368,194

This home is +0.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,663 across all districts. With a homestead exemption claimed, that drops to $5,344 — saving $1,319 per year. That's $445 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%$3,307
Round RockCity0.3720%$1,378
Williamson CountyCounty0.3694%$1,368
Austin Community Collegespecial0.1034%$383
Williamson County FM/RdCounty0.0443%$164
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,663

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $346,983 would pay approximately $2,166 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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