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3913 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,839 sqftBuilt 2011

Property at a Glance

This home is estimated between $296,689 and $800,818, with a best estimate of $588,271. 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

$296,689 $800,818
Best Estimate
$588,271
WCAD Value
$567,351
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $296,689 and $800,818. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3917 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,205 sqft Built 2011
Raw Value $638,861
Adjusted Value $526,694

Adjusted -$112,167 for 366 sqft less living space. Net adjustment: -$112,167.

4009 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,003 sqft Built 2011
Raw Value $687,055
Adjusted Value $636,794

Adjusted -$50,261 for 164 sqft less living space. Net adjustment: -$50,261.

3920 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,496 sqft Built 2011
Raw Value $498,039
Adjusted Value $296,689

Adjusted -$201,350 for 657 sqft less living space. Net adjustment: -$201,350.

4013 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,997 sqft Built 2011
Raw Value $636,693
Adjusted Value $588,271

Adjusted -$48,422 for 158 sqft less living space. Net adjustment: -$48,422.

4 bed 3 bath 1,704 sqft Built 2004
Raw Value $745,463
Adjusted Value $800,818

Adjusted +$41,373 for 135 sqft more living space and +$13,982 for being newer. Net adjustment: +$55,355.

The Neighborhood

This home is valued 9.0% 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
$567,351
Median
$623,673

This home is -9.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,308 across all districts. With a homestead exemption claimed, that drops to $9,681 — saving $1,627 per year. That's $807 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%$6,167
Round RockCity0.3720%$2,111
Williamson CountyCounty0.3694%$2,096
Austin Community Collegespecial0.1034%$587
Williamson County FM/RdCounty0.0443%$252
Upper Brushy Creek WCIDWater0.0170%$96
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$11,308

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $588,271 would pay approximately $3,672 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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