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3948 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath2,552 sqftBuilt 2006

Property at a Glance

This home is estimated between $490,896 and $764,105, with a best estimate of $561,798. 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

$490,896 $764,105
Best Estimate
$561,798
WCAD Value
$504,631
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 $490,896 and $764,105. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

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 $550,357

Adjusted +$70,794 for 231 sqft more living space and -$1,997 for being older. Net adjustment: +$68,797.

3960 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.03 mi 100% similar Same subdivision
3 bed 2 bath 2,522 sqft Built 2007
Raw Value $563,723
Adjusted Value $570,920

Adjusted +$9,194 for 30 sqft more living space and -$1,997 for being older. Net adjustment: +$7,197.

3980 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.10 mi 100% similar Same subdivision
4 bed 3 bath 2,189 sqft Built 2007
Raw Value $654,854
Adjusted Value $764,105

Adjusted +$111,248 for 363 sqft more living space and -$1,997 for being older. Net adjustment: +$109,251.

3984 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.12 mi 100% similar Same subdivision
3 bed 2 bath 2,676 sqft Built 2008
Raw Value $532,893
Adjusted Value $490,896

Adjusted -$38,002 for 124 sqft less living space and -$3,995 for being older. Net adjustment: -$41,997.

3996 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.13 mi 100% similar Same subdivision
3 bed 2 bath 2,279 sqft Built 2009
Raw Value $484,124
Adjusted Value $561,798

Adjusted +$83,666 for 273 sqft more living space and -$5,992 for being older. Net adjustment: +$77,674.

The Neighborhood

This home is valued 19.1% 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

below average
427 Properties
$623,673 Median Value
-8.0% YoY Change
1% Have Pool
100% Have Garage
This Home
$504,631
Median
$623,673

This home is -19.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $10,058 across all districts. With a homestead exemption claimed, that drops to $8,443 — saving $1,615 per year. That's $704 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%$5,485
Round RockCity0.3720%$1,877
Williamson CountyCounty0.3694%$1,864
Austin Community Collegespecial0.1034%$522
Williamson County FM/RdCounty0.0443%$224
Upper Brushy Creek WCIDWater0.0170%$86
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$10,058

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $561,798 would pay approximately $3,507 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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