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3980 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,189 sqftBuilt 2007

Property at a Glance

This home is estimated between $452,547 and $764,945, with a best estimate of $678,091. That places the property above the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673, in a neighborhood that declined 8.0% over the past year.

Estimated Value Range

$452,547 $764,945
Best Estimate
$678,091
WCAD Value
$654,854
High Confidence

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

Based on 5 comparable properties in L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP, this home's estimated market value is between $452,547 and $764,945. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3976 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
4 bed 3 bath 1,879 sqft Built 2008
Raw Value $597,975
Adjusted Value $690,983

Adjusted +$95,005 for 310 sqft more living space and -$1,997 for being older. Net adjustment: +$93,008.

3968 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,850 sqft Built 2010
Raw Value $579,247
Adjusted Value $677,148

Adjusted +$103,893 for 339 sqft more living space and -$5,992 for being older. Net adjustment: +$97,901.

3992 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,695 sqft Built 2007
Raw Value $613,550
Adjusted Value $764,945

Adjusted +$151,395 for 494 sqft more living space. Net adjustment: +$151,395.

3964 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.05 mi 100% similar Same subdivision
4 bed 3 bath 1,934 sqft Built 2007
Raw Value $599,942
Adjusted Value $678,091

Adjusted +$78,149 for 255 sqft more living space. Net adjustment: +$78,149.

3996 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.06 mi 100% similar Same subdivision
3 bed 2 bath 2,279 sqft Built 2009
Raw Value $484,124
Adjusted Value $452,547

Adjusted -$27,582 for 90 sqft less living space and -$3,995 for being older. Net adjustment: -$31,577.

The Neighborhood

This home is valued 5.0% above the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673. With 427 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.0% over the past year.

L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP

typical
427 Properties
$623,673 Median Value
-8.0% YoY Change
1% Have Pool
100% Have Garage
This Home
$654,854
Median
$623,673

This home is +5.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $13,052 across all districts. With a homestead exemption claimed, that drops to $11,409 — saving $1,643 per year. That's $951 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
Leander ISDSchool1.0869%$7,118
Round RockCity0.3720%$2,436
Williamson CountyCounty0.3694%$2,419
Austin Community Collegespecial0.1034%$677
Williamson County FM/RdCounty0.0443%$290
Upper Brushy Creek WCIDWater0.0170%$111
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$13,052

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $678,091 would pay approximately $4,233 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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