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4009 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,003 sqftBuilt 2011

Property at a Glance

This home is estimated between $284,634 and $638,532, with a best estimate of $457,976. 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

$284,634 $638,532
Best Estimate
$457,976
WCAD Value
$687,055
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 $284,634 and $638,532. 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 $576,954

Adjusted -$61,907 for 202 sqft less living space. Net adjustment: -$61,907.

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 $346,950

Adjusted -$151,089 for 493 sqft less living space. Net adjustment: -$151,089.

4112 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 3,208 sqft Built 2008
Raw Value $647,936
Adjusted Value $284,634

Adjusted -$369,294 for 1,205 sqft less living space and +$5,992 for being newer. Net adjustment: -$363,302.

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 $638,532

Adjusted +$1,839 for 6 sqft more living space. Net adjustment: +$1,839.

4 bed 3 bath 2,018 sqft Built 2000
Raw Value $440,601
Adjusted Value $457,976

Adjusted -$4,597 for 15 sqft less living space and +$21,972 for being newer. Net adjustment: +$17,375.

The Neighborhood

This home is valued 10.2% 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
$687,055
Median
$623,673

This home is +10.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $13,694 across all districts. With a homestead exemption claimed, that drops to $12,045 — saving $1,649 per year. That's $1,004 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%$7,468
Round RockCity0.3720%$2,556
Williamson CountyCounty0.3694%$2,538
Austin Community Collegespecial0.1034%$710
Williamson County FM/RdCounty0.0443%$305
Upper Brushy Creek WCIDWater0.0170%$117
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$13,694

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $457,976 would pay approximately $2,859 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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