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3964 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,934 sqftBuilt 2007

Property at a Glance

This home is estimated between $362,957 and $753,636, with a best estimate of $598,998. That places the property below 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

$362,957 $753,636
Best Estimate
$598,998
WCAD Value
$599,942
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 $362,957 and $753,636. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3968 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
4 bed 3 bath 1,850 sqft Built 2010
Raw Value $579,247
Adjusted Value $598,998

Adjusted +$25,743 for 84 sqft more living space and -$5,992 for being older. Net adjustment: +$19,751.

3972 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
4 bed 3 bath 1,216 sqft Built 2010
Raw Value $539,584
Adjusted Value $753,636

Adjusted +$220,044 for 718 sqft more living space and -$5,992 for being older. Net adjustment: +$214,052.

3956 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
3 bed 2 bath 2,321 sqft Built 2007
Raw Value $481,560
Adjusted Value $362,957

Adjusted -$118,603 for 387 sqft less living space. Net adjustment: -$118,603.

3952 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,950 sqft Built 2004
Raw Value $592,854
Adjusted Value $593,943

Adjusted -$4,903 for 16 sqft less living space and +$5,992 for being newer. Net adjustment: +$1,089.

3976 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,879 sqft Built 2008
Raw Value $597,975
Adjusted Value $612,834

Adjusted +$16,856 for 55 sqft more living space and -$1,997 for being older. Net adjustment: +$14,859.

The Neighborhood

This home is valued 3.8% below the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673. That positions it competitively for buyers comparing within the neighborhood. 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
$599,942
Median
$623,673

This home is -3.8% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,957 across all districts. With a homestead exemption claimed, that drops to $10,325 — saving $1,632 per year. That's $860 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%$6,521
Round RockCity0.3720%$2,232
Williamson CountyCounty0.3694%$2,216
Austin Community Collegespecial0.1034%$620
Williamson County FM/RdCounty0.0443%$266
Upper Brushy Creek WCIDWater0.0170%$102
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$11,957

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $598,998 would pay approximately $3,739 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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